Legion Y700?

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LisaMaria

Member
Oct 20, 2022
33
24
IMG20221120151034.jpg

Hey all there is this super obnoxious gray bar with apps at the bottom of my screen. Using crdroid and can't figure out how it got there or how to disable it. Ahh it's so annoying
 

LisaMaria

Member
Oct 20, 2022
33
24
I tried thos
so after everything i did, i ended up in same place as you did. bootlooped.
so first i learned driver issue, there is few different modes that y700 shows up on in windows device manager, if its not showing one of these modes without yellow mark then theres driver issue,
so in android "recovery" mode its shows in windows as "lenovo TB-9707F"
from recovery mode select "enter fastboot" which for flashing you need it to be showing in windows as "android bootloader interface" once you have that interface your good for Crdroid or customs roms.
Otherwise for bootloops you need EDL mode, this can be achieved by holding volume up while plugging in usb cable while device is turned off, if connected and correct drivers are installed then this will show in device manager under
"Port COM & LPT"
- "Qualcomm HS-USB QDLoader 9008".
2nd i didnt notice that .img.xz file for crdroid was a zipped file and needed extracted as didnt have winrar installed (doing this y700 with a fresh windows 10 install)
so after failing the install and boot looping my system followed your above guide plus this
and got back to stock rom (which now tried and tested)
so now i got that far thought mmmm why not try cr droid..... again...
so this time winrar'd crdroid .img.xz file to get the 3gb+ .img file (now things are making sense lol)
it installed without issue this time round after following the guide from
(android 13 version also available in the above link)...

3rd thing i messed up...... after trying out crdroid and not being able to get battery charge limit/protection mode, ive look at rooting the device, so i followed this https://unofficialtwrp.com/twrp-root-lenovo-legion-y700/ tutorials online to install twrp, and flashing it to recovery partition as well. i used the included twrp img file on website think it was version 3.6.2. also included the vbmeta file in to platform tools directory along with the twrp file and done command
fastboot --disable-verity --disable-verification flash vbmeta vbmeta.img
fastboot erase userdata.
rebooted device into recovery mode to find that only get a status bar at the top...... nothing else shows just blue screen with status bar at top....
same issue as this person

soooo that then again bootlooped my device again so had to go back to stock room install and start from scratch again, so... now am looking at how to get this device rooted,
is it easyer to root device from stock then upgrade to crdroid again... or crdroid thgen root device?
also now that on stock again anyone tried android 13 on this device? mite test it in mean time till find how to root this device properly......

hope this helps someone.
Same thing happen to me I just see a line on twrp so I gave up. 8buse android 12l and just ran the boot img through magisk then flashed it then turned on device and hit direct install and I was rooted
 

LisaMaria

Member
Oct 20, 2022
33
24
any one able help on why its falling to flash??????

C:\Users\Admin\Desktop\platform-tools>fastboot flash system C:\Users\Admin\Downloads\crDroid-9.0-arm64_bgN-Unofficial.img
Resizing 'system_a' OKAY [ 0.005s]
error: write_sparse_skip_chunk: don't care size 951510232 is not a multiple of the block size 4096
error: write_sparse_skip_chunk: don't care size 683078872 is not a multiple of the block size 4096
error: write_sparse_skip_chunk: don't care size 414647512 is not a multiple of the block size 4096
error: write_sparse_skip_chunk: don't care size 146216152 is not a multiple of the block size 4096
Sending sparse 'system_a' 1/5 (262140 KB) error: write_sparse_skip_chunk: don't care size 951510232 is not a multiple of the block size 4096
error: write_sparse_skip_chunk: don't care size 951510232 is not a multiple of the block size 4096
OKAY [ 10.560s]
Writing 'system_a' FAILED (remote: 'No such file or directory')
fastboot: error: Command failed
Run through fastboot-d from recovery instead
 

Saumer

Member
Mar 16, 2019
36
10
Im using GSI on zui13 that can find in lolinet. after flash zui14 vendor&boot, pen works.
but Lenovo DT2W in phh treble setting app disappears.
I tried set some props to zui13's one but DT2W still not works.
Is someone know the way how to enable DT2W ?
is it unable in this time ? or Should I flash some other img files? if then, Do I have to wipe /data ?
 

JotaroDeus

New member
Nov 21, 2022
4
0
Hello, noob question here, I got the tablet a few days ago, bought from giztop, arrived with the so called "Global rom" ZUI 13.1.570 ST. Should I change to stock rom? Can you put stock rom in english and install google play on it? Also can somebody make a quick tutorial on how to install ZUI 14? Thanks. So far tablet seems great, I encountered a pretty nasty problem that is software related?possiblly, If I am using an 18W PD charger the tablet switches from turbo charging to not charging every 30~ seconds. It's not the USB port since the OG charger works perfcetly.
 

STHellRaiser

Member
Jul 18, 2013
38
13
Hello, noob question here, I got the tablet a few days ago, bought from giztop, arrived with the so called "Global rom" ZUI 13.1.570 ST. Should I change to stock rom? Can you put stock rom in english and install google play on it? Also can somebody make a quick tutorial on how to install ZUI 14? Thanks. So far tablet seems great, I encountered a pretty nasty problem that is software related?possiblly, If I am using an 18W PD charger the tablet switches from turbo charging to not charging every 30~ seconds. It's not the USB port since the OG charger works perfcetly.
I can say currently using stock rom after using goba rom, stock is defo better.
Gobal has removed so many features that are available on the stock.... Tho am not sure if that was just my gobal or what....
But i had basically no legion feature what so ever.

Tho if i can get it rooted under crdroid then thats a 9/10 compared to the 4/10 under gobal rom and 7/10 stock rom.

For rom changes check the above previous page everything is there.... Literally everything so far.
Just not full rooting yet.....
 

JotaroDeus

New member
Nov 21, 2022
4
0
I can say currently using stock rom after using goba rom, stock is defo better.
Gobal has removed so many features that are available on the stock.... Tho am not sure if that was just my gobal or what....
But i had basically no legion feature what so ever.

Tho if i can get it rooted under crdroid then thats a 9/10 compared to the 4/10 under gobal rom and 7/10 stock rom.

For rom changes check the above previous page everything is there.... Literally everything so far.
Just not full rooting yet.....
I see, thanks, on my "global rom" I still have the legion features, PC mode, etc but the only thing I dislike currently is the icons being squares. Are you on zui13 or 14?
 

STHellRaiser

Member
Jul 18, 2013
38
13
I see, thanks, on my "global rom" I still have the legion features, PC mode, etc but the only thing I dislike currently is the icons being squares. Are you on zui13 or 14?
Pc mode was there for me, but legion assistant, legion taskbar, face id, switch button,prob few other things weren't available, could just been "aliexpress" version that is like that, unknown.
I couldn't tell u anything on the icons part as i use nova launcher (got it free with razor).
As for ur charging issue, i read somewhere y700 deosnt support pd charging just 45w charging, (what difference all new charger shizz still fully getting to grips my self)
I believe stock ware i now have is alway zui 13
 

STHellRaiser

Member
Jul 18, 2013
38
13
I tried thos

Same thing happen to me I just see a line on twrp so I gave up. 8buse android 12l and just ran the boot img through magisk then flashed it then turned on device and hit direct install and I was rooted
Ive also tried TWRP 3.7 version for yoga tab, that made me lost recovery mode altogether,
When tried to enter recovery mode it would just boot back to fastboot.
So yet again had to go back and do stock firmware install again to recover recovery mode.
so hence am now back on stock firmware....again....
am tempted to go bk to crdroid, but how to go about rooting it is issue.

i see you mention using boot.img file, i read up on that method, but do i need crdroid installed first or do it from stock rom??
Otherwise where did you get boot.img file from? Stock firmware? which ive taken boot.img file from already and patched that with magisk....but is that correct boot.img file to patch/load back into phone? No matter which os version is installed?
Or do i need the boot.img form crdroid, which hence brought to install twrp to make recovery and take boot.img file directly from crdroid on phone....
 
Last edited:
Ive also tried TWRP 3.7 version for yoga tab, that made me lost recovery mode altogether,
When tried to enter recovery mode it would just boot back to fastboot.
So yet again had to go back and do stock firmware install again to recover recovery mode.
so hence am not back on stock firmware....again....
am tempted to go bk to crdroid, but how to go about rooting it is issue.

i see you mention using boot.img file, i read up on that method, but do i need crdroid installed first or do it from stock rom??
Otherwise where did you get boot.img file from? Stock firmware? which ive taken boot.img file from already and patched that with magisk....but is that correct boot.img file to patch/load back into phone? No matter which os version is installed?
Or do i need the boot.img form crdroid, which hence brought to install twrp to make recovery and take boot.img file directly from crdroid on phone....
I tried that TWRP too, but apparently I think the Recovery is broken or not from Y700.
If you have the Stock recovery.img, I suggest you flash it again.
 

stryke-

Member
Jan 14, 2011
38
14
For now only released in China. (Just like Pad pro 2021)

Here is the ZUI 14 OTA link captured
Must be on 13.1.578 first
Thanks for the link.

For the sake of prosperity I had trouble with google play store after the update, the app went missing and I couldn't reinstall from the lenovo app store. Gave some error in chinese I can't read. Sideloading didn't exactly solve it either as it didn't seem to communicate well with the pre-existing google services on the device - got that error DF-DFERH-01.

Only fix was a factory reset and it was fine after that.
 

RenatoKazuo8w

New member
Jun 23, 2022
1
0
Thanks for the link.

For the sake of prosperity I had trouble with google play store after the update, the app went missing and I couldn't reinstall from the lenovo app store. Gave some error in chinese I can't read. Sideloading didn't exactly solve it either as it didn't seem to communicate well with the pre-existing google services on the device - got that error DF-DFERH-01.

Only fix was a factory reset and it was fine after that.
Hello, is the Security app working normally there? It doesn't open here, I also had the Google Play problem and I solved it by uninstalling the Google Play Services updates, I think about doing a factory reset if it solves the app problem.
 

LisaMaria

Member
Oct 20, 2022
33
24
Worked like a charm 👌 how dumb and invasive but easy fixed. I'm definitely happyly rooted. I always use this app called gesture control for my home button and set the haptic feed back really high. Highly recommend 👍
On LineageOS GSI, settings-system-buttons-enable taskbar if disabled, you will get normal 3-dot.
if this not works on crdroid, try this if you rooted your device. https://github.com/Coxxs/hide-tablet-taskbar
 

LisaMaria

Member
Oct 20, 2022
33
24
Install crdroid then run the boot img from stock rom in magisk then flash boot that boot. Img file open magisk then it will reboot then you are rooted on crdroid like me lol



edit: actually i just reflashed and rerooted crdroid last night so here is my fresh boot img ran through masgisk made by your truly :) https://www.mediafire.com/file/gj7fl215j3dtii1/magisk_patched-25200_Pn3KK.img/file
Ive also tried TWRP 3.7 version for yoga tab, that made me lost recovery mode altogether,
When tried to enter recovery mode it would just boot back to fastboot.
So yet again had to go back and do stock firmware install again to recover recovery mode.
so hence am now back on stock firmware....again....
am tempted to go bk to crdroid, but how to go about rooting it is issue.

i see you mention using boot.img file, i read up on that method, but do i need crdroid installed first or do it from stock rom??
Otherwise where did you get boot.img file from? Stock firmware? which ive taken boot.img file from already and patched that with magisk....but is that correct boot.img file to patch/load back into phone? No matter which os version is installed?
Or do i need the boot.img form crdroid, which hence brought to install twrp to make recovery and take boot.img file directly from crdroid on phone....
 
Last edited:

STHellRaiser

Member
Jul 18, 2013
38
13
Install crdroid then run the boot img from stock rom in magisk then flash boot that boot. Img file open magisk then it will reboot then you are rooted on crdroid like me lol



edit: actually i just reflashed and rerooted crdroid last night so here is my fresh boot img ran through masgisk made by your truly :) https://www.mediafire.com/file/gj7fl215j3dtii1/magisk_patched-25200_Pn3KK.img/file
your an absolute star. i hope all info helps other with the amazing device. shame they never released a LTE version i would defo buy it aswell and have both.

crdroid installed, and rooted without issue all within 30 mins.
what seems so easy now was so complex looking before.

now that ive got all that installed Battery charge limit as well to provide overcharge proctection on battery while plugged in, and works first time so far without issue.
checked with ampere and whille it at limit its stop charging but using the mains still. sweet....

now just need to test how cr droid works with pc mode.... as hear it was made standard feature of android 11+
 

Top Liked Posts

  • 1
    Did you ever find out how to relock it? I'm currently in the same spot you were. The option to relock the bootloader is greyed out
    No.. haven't found anything that worked.
    1
    got my y700 the other day and updated to zui 14.0.231. the legion zone doesn't go beyond 305mhz even if i uninstalled it. i've reset it a bunch of times but still the gpu doesn't go beyond 305mhz. tried to unlock the bootloader but i have an error like this:
    C:\platform-tools>fastboot oem unlock-go
    FAILED (remote: 'Command not supported in default implementation')
    fastboot: error: Command failed..
    been reading this thread from page 1 but still no luck. hope anyone has a guide of help me with this. also i wanted to remove the chinese language but cannot. legion zone is still in chinese
    1
    Seems like Lenovo is finishing with gaming phone brand "Legion". Just saw in the news. Wander if that means that they are losing interest in "Legion" tablet 8.8"? Lenovo should have public representative for such and similar questions. In today's world I find less and less thoughtful people and people who are good at solving problems..
  • 6
    Okay. I have managed to do everything from combined insights. So, let me save you guys the trouble I had by writing my proces down (and for myself for the future).
    I came from the 'global rom'. And wanted to end with 13.1.578 ROOTED

    1. Download this file. It contains the stock firmware on 13.0.586. Unzip it, and find the recovery.img as we need it later.
    2. Upgrade all the way you like through OTA.
    3. Flash TWRP from here. Know that it is a 'faulty' version with only a line on top of the screen. And this vbmeta file. Place both files in your ADB folder.
    4. Use ADB to extact the boot.img from the version you are on.
    4.1 Boot into the bootloader (adb reboot bootloader).
    4.2 disable AVB (not sure this is necessary, but it worked for me) by sending the following commands:
    fastboot --disable-verity --disable-verification flash vbmeta vbmeta.img
    fastboot erase userdata
    4.3 Instal TWRP by sending this command : fastboot flash recovery recovery.img (note that you use the name you gave your TWRP file)
    4.4 reboot in recovery mode (fastboot reboot recovery/manually on the tablet)

    Now the TWRP recovery should load, with only a line on top, and nothing else.

    4.5 In the TWRP recovery enter: adb shell (you should see a # appearing in the line)
    4.6 Send these commands out:
    dd if=/dev/block/bootdevice/by-name/boot of=/sdcard/boot.img
    adb pull /sdcard/boot.img stock_boot.img


    what this does, is extracting the boot.img of that specific version you are running, and placing a copy of it into your adb folder.
    4.7 send these commands to get back to the bootloader:
    twrp reboot bootloader

    5. Flash back the stock recovery. If you followed the guide, you have the stock recovery from step 1. Give it a fancy name, and place that file in your adb folder and sending this command:
    fastboot flash recovery yourfancyname.img
    fastboot reboot


    Now it may give some warnings and errors. It told me to do a factory wipe, wich was okay for me. After that the tablet starts normally. Stock firmware, but still on the same version I wanted.

    6. Now the easy part starts. The stock_boot.img you got in step 4.6, should be on your pc. After the inital setup on the tab, place that in your root folder. Download Magisk and install it on your tablet. When it is installed, click on 'install' and 'select and patch a file'. Select the stock_boot.img you moved to the root of your tablet. The patched file will be in your download folder. Transfer that patched file to your adb folder on the computer.

    7. Go into adb and boot the tablet into recovery mode (this should be the stock recovery again): adb reboot recovery.

    8. In recovery mode, go to fastboot. It'll say fastbootd on top.

    9. Enter this command: fastboot flash boot patched-file-of-magisk.img

    10. Restart the tablet. Congrats, you now have rooted your desired version.

    It might be to much info, but I wish I had these steps. It was late yesterday. Very late...So to save you the troubles, I present you my humble guide. If you have improvements in the steps or instructions, please let me know!!
    4
    How did you manage to get pc mode back??
    Use this apk to switch between modes :D
    3
    I'm making a fastboot ROM with extracted img files from ZUI to try GSI with various vendors & boot.
    I plan to upload a total of four versions: the final version of ZUI13, one before that, and two versions of ZUI14.
    3
    Why Chinese rom and why the annoyance? lol I'm US user so if I do, can I switch it to English?
    Chinese ROM because there is no actual global ROM and your really don't want some reseller installing some random crap, you can just do that yourself when you get it. You can easily switch to english and install Google Play store on chinese ROM.

    Annoyance because the notification pulldown is a bit janky and notifications don't always seem to show up like I would expect. Plus every once in a while there will be something in Chinese you need to translate with another phone or take a snapshot and send to Google translate to see what it is telling you (aka new version released etc).

    Even with the above it is a super nice piece of hardware. I would love a real global ROM, but at the same time I am totally happy with the device.
    2
    Hi, Can i check if the tablet with china ROM allows to install Netflix app?
    I have China ROM ZUI 14 and Netflix, Prime Video, HBO Go and Disney+ are FHD, no HDR or Dolby Vision though.
  • 11
    Bricked Lenovo Y700? Follow this guide.


    Windows guide, might work for other aswell.

    I finally solved my problem with my Lenovo Y700 tablet being stuck in bootloop mode due to trying to flash Magisk boot with a mismatched firmware version. This resulted in the UI constantly crashing, and I could not connect to Wi-Fi, and other problems...
    I tried flashing back to stock with QFIL, which put the device in a bootloop. I will explain why later on.

    I also lost recovery mode due to trying to solve the problem, and now I was stuck with either showing the bootloader screen, or restarting the tablet, which brought me back to the bootloader.

    So the tablet was now genuinely useless. This is what I did to bring back the stock ROM and later flash to crDroid 8.10.
    Flashing boot.img, system.img or recovery.img was no luck.

    First off, there is no need to have unlocked "USB debugging" before your tablet bricked.
    Second, you don't need to have your "sn.img" file from Lenovo, you can unlock the bootloader using fastboot commands.
    Fastboot commands works on the bootloader screen, without having ADB connection.

    Start by downloading these four files:
    Platform tools r33.0.2
    QPST_2.7.496
    Qualcomm_USB_Driver_v1.0
    Lenovo Y700 tablet stock ROM


    We'll start by unlocking your bootloader. You can do this from the bootloader screen. If you for some reason can enter recovery mode, enter fastboot.

    1. Connect your tablet to your PC.

    2. Open a terminal windows in the ADB folder. On Windows 11 this can be done by right-clicking inside the ADB folder and select "Open in terminal". If you don't have that option, try Shift + Right-click. If that doesn't work, you can always start the terminal by pressing Win + R, and type in "cmd" without citations. Now you have to navigate to your ADB folder by typing
    Code:
    cd (here you'll type in the location of your ADB folder)
    Without the brackets.

    3. When located, type in
    Code:
    fastboot devices
    You should see your tablet in the list.
    If not, try using another cable or USB port on your PC.

    4. Now type in
    Code:
    fastboot oem unlock-go
    Restart your tablet, and it should now say "unlocked" under "DEVICE STATE" in the bootloader.

    5. Now you can start by installing the programs on your PC, QTPS, Qualcomm driver and platform tools.

    6. Extract ALL files from your stock ROM to the "bin" folder in QTPS location (usually C:\Program Files (x86)\Qualcomm\QPST).
    This will help with Sahara errors in QFIL.

    7. Open QFIL from your QTPS bin folder, it installs with QTPS. Don't worry if it shows "No Port Available", we'll get to that. Your configuration should look like this:

    QFILconfpng.png


    Your main window should look like this:

    qfil.png


    Don't worry about the "status" window.

    Hit "browse" in the "Programmer Path" window, and navigate to your QTPS bin folder. Select "prog_firehose_ddr.elf"
    Hit "Load XML", and navigate to your QTPS bin folder. Now, select ALL of the "rawprogram" files (my first mistake, I only selected the "rawprogram_unsparse0.xml" file on first flash)

    In the next window, select ALL of the "patch" files (my second mistake, I only selected the "patch0.xml file" on first flash).
    Without doing this, you will only flash a portion of the ROM, and not all of the partitions needed.

    8. Now it's time to reboot you tablet into EDL mode to be able to flash. Start your tablet by pressing VolUp + Power button.
    If you can't turn off your tablet when connected to PC, just select "Power off", and just hold the VolUp button as soon as the device vibrates and reboots, keep holding until the screen flickers and turns off.

    9. Now QFIL should detect the Qualcomm 9008 port. If not, hit "Select Port" and select the Qualcomm 9008 port.

    10. Hit the now available "Download" button, and the flashing should begin. Allow it to run its course, and it should reboot the tablet when done. Might take a while.

    If flashing won't start properly, you might have waited too long between entering EDL mode and hitting the "Download" button.
    If so, disconnect your device, which might now be "dead".

    Don't worry, you can fix this be holding VolUp + VolDown + Power button for a long time, say about a minute to be sure. Release the Volume keys some second before releasing the Power button.
    Hit the power button again, and the tablet should boot to bootloader screen again.
    Repeat the steps to enter EDL mode, and now hit the "Download" button in QFIL when it becomes available, don't wait too long.


    You're done!

    I recommend opening "Settings", enable "Developer" option, by pressing the "Build number" on the "About tablet" screen repeatedly until a pop-up appears saying "You are now a developer".
    Open "Developer options" and hit "Enable USB debugging", it will allow you to run ADB commands from your platform tools folder.
    If you want, you can again open the terminal in the platform tools folder and type
    Code:
    adb devices
    It should now show your device in the list.

    Now you can uncheck the "OEM unlocking" in the "Developer options" which should let you get OTA updates when available.

    There are plenty of guides on how to flash different GSI's like crDroid, so I won't cover that here.

    Enjoy your tablet!
    8
    Hi all.
    I just got this tablet yesterday.
    Language available on tablet are chinese and english maybe (morelocale2 could be useful)
    Google play services can be download directly from ZUI app store inside the tablet.
    Widevine L1.
    not sure about root or unlock bootloader (didn't use android device for a long time)
    6
    Okay. I have managed to do everything from combined insights. So, let me save you guys the trouble I had by writing my proces down (and for myself for the future).
    I came from the 'global rom'. And wanted to end with 13.1.578 ROOTED

    1. Download this file. It contains the stock firmware on 13.0.586. Unzip it, and find the recovery.img as we need it later.
    2. Upgrade all the way you like through OTA.
    3. Flash TWRP from here. Know that it is a 'faulty' version with only a line on top of the screen. And this vbmeta file. Place both files in your ADB folder.
    4. Use ADB to extact the boot.img from the version you are on.
    4.1 Boot into the bootloader (adb reboot bootloader).
    4.2 disable AVB (not sure this is necessary, but it worked for me) by sending the following commands:
    fastboot --disable-verity --disable-verification flash vbmeta vbmeta.img
    fastboot erase userdata
    4.3 Instal TWRP by sending this command : fastboot flash recovery recovery.img (note that you use the name you gave your TWRP file)
    4.4 reboot in recovery mode (fastboot reboot recovery/manually on the tablet)

    Now the TWRP recovery should load, with only a line on top, and nothing else.

    4.5 In the TWRP recovery enter: adb shell (you should see a # appearing in the line)
    4.6 Send these commands out:
    dd if=/dev/block/bootdevice/by-name/boot of=/sdcard/boot.img
    adb pull /sdcard/boot.img stock_boot.img


    what this does, is extracting the boot.img of that specific version you are running, and placing a copy of it into your adb folder.
    4.7 send these commands to get back to the bootloader:
    twrp reboot bootloader

    5. Flash back the stock recovery. If you followed the guide, you have the stock recovery from step 1. Give it a fancy name, and place that file in your adb folder and sending this command:
    fastboot flash recovery yourfancyname.img
    fastboot reboot


    Now it may give some warnings and errors. It told me to do a factory wipe, wich was okay for me. After that the tablet starts normally. Stock firmware, but still on the same version I wanted.

    6. Now the easy part starts. The stock_boot.img you got in step 4.6, should be on your pc. After the inital setup on the tab, place that in your root folder. Download Magisk and install it on your tablet. When it is installed, click on 'install' and 'select and patch a file'. Select the stock_boot.img you moved to the root of your tablet. The patched file will be in your download folder. Transfer that patched file to your adb folder on the computer.

    7. Go into adb and boot the tablet into recovery mode (this should be the stock recovery again): adb reboot recovery.

    8. In recovery mode, go to fastboot. It'll say fastbootd on top.

    9. Enter this command: fastboot flash boot patched-file-of-magisk.img

    10. Restart the tablet. Congrats, you now have rooted your desired version.

    It might be to much info, but I wish I had these steps. It was late yesterday. Very late...So to save you the troubles, I present you my humble guide. If you have improvements in the steps or instructions, please let me know!!
    5
    I have flashed a lot of GSI on this tablet so far.
    Here is a summary of the bugs and other issues that I have noticed in them.
    ※All of them are Android 12L except for the ones without special notes.

    ①Corvus OS, Descendant OS, Cherish OS...Lock screen does not rotate. Probably because it is based on Google Pixel ROM. Corvus also does not have face unlock. The latest Corvus also added this.
    ②Ancient OS(Android 12.0)...Lock screen does not turn to landscape. Also, when I change the username or photo at the top of the settings, the settings app crashes. Also note that the settings app crashes if you change the username or photo above the settings.
    ③Proton AOSP...When I restarted to set up Magisk, the settings app repeatedly stops. Deleting app data and cache had no effect.
    ④Havoc OS(Android 11)...The startup logo does not appear in the first place and comes back to the bootloader.
    ⑤Superior OS...It started, but the FPS dropped extremely. I judged that it is difficult to use regularly.
    ⑥Pixel Experience…The screen is still not landscape. Also, it seems that it is not optimized for tablets any more than Descendant, and when I call the dock while launching an app(the feature of 12L), the icon looks like it has been split in half.
    ⑦All of NipponGSI...Like Havoc OS, it comes back to the bootloader. It may be a bad compatibility.
    ⑧Lineage OS…There was a switch "Rotate lock screen" in the settings. But I don't use it, because the "su" binary is still in the root file and can't delete it ,so interferes with SafetyNet.
    ⑨Arrow OS...This also allows the lock screen to be turned landscape and is also very light. Although the lack of face unlock is a demerit (LSPosed module didn't work→https://forum.xda-developers.com/t/11-universalauth-face-unlock-for-all-roms.4419343/).But there are few complaints for me. So I'm using it regularly.

    I'm sorry if it's hard to read because I'm not good at English. Thank you.
    5

    If you tried looking yourself its pretty easy to find. No one here owes you anything.
    Yep. The information is all in this thread.

    That said - we need our own forum :D

    [EDIT]
    Okay @alex4723717 , here are some important posts:
    91, 135, 226, 240, 264, 331, 343, 379