[ROM][SM-T825][UNOFFICIAL] LineageOS 15.1 | Android 8.1 20180719
- Thread starter Valera1978
- Start date
I have some doubts.
1. S-pen works?
2. Can I use adaptative storage (put apps on microSD, as an extension of the internal memory)?
1. S-pen works?
2. Can I use adaptative storage (put apps on microSD, as an extension of the internal memory)?
Thinking of putting lineage on this thing because it's very laggy on stock. Apps take awhile to open, keyboard takes awhile to pop up, stutters in places, etc.
My question, before I do all of this, is does lineage improve these issues dramatically? Stock has enough cool features that I wouldn't want to give up for marginal improvements.
My question, before I do all of this, is does lineage improve these issues dramatically? Stock has enough cool features that I wouldn't want to give up for marginal improvements.
EugenStanis
Senior Member
So after more than month of intensive testing, i discovered:
- App's preview are blank in multitask menu
- Settings FC when tap on ambient display in battery settings
- Little but annoying battery drain (about 8% per 9 hour night)
- Sometimes apps seems to works slow (e.g settings)
- Voice calls are not working
- Camera FC
Rest is working fine for me. I hope future updates improve speed, eliminate bugs and bring us something new. I would try omni oreo or clean aosp but it is hard to implement and i am not experienced enough to bulid it.
At the end big thanks to Valera for bringing this to all of us.
- App's preview are blank in multitask menu
- Settings FC when tap on ambient display in battery settings
- Little but annoying battery drain (about 8% per 9 hour night)
- Sometimes apps seems to works slow (e.g settings)
- Voice calls are not working
- Camera FC
Rest is working fine for me. I hope future updates improve speed, eliminate bugs and bring us something new. I would try omni oreo or clean aosp but it is hard to implement and i am not experienced enough to bulid it.
At the end big thanks to Valera for bringing this to all of us.
I only used the stock rom for about 2 days, so don't have the best feel for it, but I think there was a definite improvement from switching to LineageOS.
With stock I remember quite a bit of lag and freezing in the first few minutes after boot when I assume things were starting up. With LinegaeOS, I haven't ever experienced that. (I'm using LineageOS without any gapps or google services, so that may be a reason.)
It might be my imagination, but the S Pen feels even more responsive with LineageOS and Squid vs stock and Samsung Notes. The only other tablet that felt this good to write on was the iPad Pro.
So yeah, I'd give it a try.
I've noticed that `system_server` uses a constant 8-9% of CPU regardless of what I'm doing or apps are open. Does everyone else have this? Any ide what the cause is?
I'm not running gapps or any google services, so I'd expect the system to not use so much CPU when no apps are open and it's idle.. (battery life is still decent, however)
I'm not running gapps or any google services, so I'd expect the system to not use so much CPU when no apps are open and it's idle.. (battery life is still decent, however)
EugenStanis
Senior Member
@Valera1978 Is there any possibilty of making a new build for us t820 owners? Unfortunately the dev that was making builds for us, is gone due to his broken tab. Im sure alot of us would appreciate it. I would be willing to test any builds. Unfortunately i dont have the skills to build a rom.
OP mentions a battery drain due to the hardware not entering a deep sleep power state. That should have nothing to do with a system process using a lot of CPU.
EugenStanis
Senior Member
Sorry, i dont have issues like You. No battery drain while tablet is in use. Only in deepsleep.
You keep misreading what I wrote.. I never claimed an additional battery drain, just a high CPU usage.
EugenStanis
Senior Member
No problems like that for me. I dont use any apps that works in background, my cpu usage is very similar to my OnePlus 5T running Omni rom
I believe the 820 & 825 are the same, with the exception of the LTE radio, so I'm hoping we can port it to our WiFi version without too much hassle. I'll try to get in touch if I have any luck.
Can someone else using this rom run the Sunspider benchmark?
https://webkit.org/perf/sunspider/sunspider.html
Browseing has felt a bit slow, and I thought it was because I was using Firefox, but after testing Firefox, LOS Browser, and Chrome, all are showing Sunspider scores of 900-1,000ms, which is quite a bit slower than most published Snapdragon 820 results. Googling shows Tab S3 benchmarks closer to 400ms..
So I'm wondering if there's something specific about my tablet or is it possible this rom is causing a slowdown relative to stock rom?
---------- Post added at 03:15 AM ---------- Previous post was at 02:43 AM ----------
Not sure if this info is correct, but it appears the the max cpufreq is not set to the highest available frequency:
gts3llte:/ # cat /sys/devices/system/cpu/cpu3/cpufreq/scaling_av
scaling_available_frequencies scaling_available_governors
at /sys/devices/system/cpu/cpu3/cpufreq/scaling_available_frequencies <
307200 403200 480000 556800 652800 729600 806400 883200 940800 1036800 1113600 1190400 1248000 1324800 1401600 1478400 1555200 1632000 1708800 1785600 1824000 1920000 1996800 2073600 2150400
gts3llte:/ # cat /sys/devices/system/cpu/cpu3/cpufreq/scaling_max_freq
1920000
https://webkit.org/perf/sunspider/sunspider.html
Browseing has felt a bit slow, and I thought it was because I was using Firefox, but after testing Firefox, LOS Browser, and Chrome, all are showing Sunspider scores of 900-1,000ms, which is quite a bit slower than most published Snapdragon 820 results. Googling shows Tab S3 benchmarks closer to 400ms..
So I'm wondering if there's something specific about my tablet or is it possible this rom is causing a slowdown relative to stock rom?
---------- Post added at 03:15 AM ---------- Previous post was at 02:43 AM ----------
Not sure if this info is correct, but it appears the the max cpufreq is not set to the highest available frequency:
gts3llte:/ # cat /sys/devices/system/cpu/cpu3/cpufreq/scaling_av
scaling_available_frequencies scaling_available_governors
at /sys/devices/system/cpu/cpu3/cpufreq/scaling_available_frequencies <
307200 403200 480000 556800 652800 729600 806400 883200 940800 1036800 1113600 1190400 1248000 1324800 1401600 1478400 1555200 1632000 1708800 1785600 1824000 1920000 1996800 2073600 2150400
gts3llte:/ # cat /sys/devices/system/cpu/cpu3/cpufreq/scaling_max_freq
1920000
It hasn't worked.
Thanks for your great job.
Hey, dude. I've been trying to flash it on my Tab S3 (T825) following the instructions, but it always shows an error followed by a number 7. I'd like to use this custom ROM 'cos the the stock one occupies a lot of space. I tried to root it and uninstall some apps I don´t like but this procedure makes tab restart in bootloop.
Anyway, thanks.
Thanks for your great job.
Hey, dude. I've been trying to flash it on my Tab S3 (T825) following the instructions, but it always shows an error followed by a number 7. I'd like to use this custom ROM 'cos the the stock one occupies a lot of space. I tried to root it and uninstall some apps I don´t like but this procedure makes tab restart in bootloop.
Anyway, thanks.
Last edited:
EugenStanis
Senior Member
First: Dont quote whole OP
Second: this is only for Samsung Tab S3 T825 with LTE
Third: Flash rom with TWRP provided by OP followed by full wipe (format /data, wipe system, dalvik, ART, cache and data)
Similar threads
Top Liked Posts
-
There are no posts matching your filters.
-
21I'm not responsible for any damage to your device of any sort.
By flashing this you take responsibility of anything that happens.
Process at your own risk!
If you want to check firmware - please make backup. Better to store all partitions, at least efs and may be modem.
Instructions
1. Install twrp
2. Download the zip(s) - firmware and Google Apps additional package (optional)
3. Backup all partitions (it least efs) and store somewhere - it need to do - because you can loose imei
4. Full wipe all
5. Flash firmware and gapps
Known Issues
sound 2 skeakers only for now
power drain (tablet is not in deepsleep, it's almost all time in the awake on min 300 freq) - look like this is common qcom problem, at least I got the same stuff on my old nore pro 12.2 p905 with qcom 800
Links
LineageOS Builds:
5: 20180719: July security patch level: https://drive.google.com/file/d/1Z04QRqQcZjsYTBSoAFmafAJfkn7SoVbU/view?usp=sharing
4: 20180615: June security patch level, selinux enforcing now, sound from sources (call working, one problem with sound from sources - only 2 bottom speakers now), add samsung softkeymaster for encryption: https://drive.google.com/file/d/1Dgmp1vQ5AaYTzx1fSWtB1mQEa5Y9D2M-/view?usp=sharing
3. 20180530: fingerprint, new samsung doze: https://drive.google.com/file/d/1Q0kQszcx6kbrDR02R-WHRG-DAz58VGcz/view?usp=sharing
2. 20180529: new kernel (T820XXU1BRE2/T825XXU1BRE2), fully rebrand vendor, ril fixed, a lot changes in config\scripts: https://drive.google.com/file/d/1Ib-EhXDR47YGQIlDTz0cD00bX1hkRLnL/view?usp=sharing
1. 20180423: https://drive.google.com/file/d/1ZX38lpXNw8PXfqUABEsW5avXvrFMORtV/view?usp=sharing
TWRP:
Use twrp from https://forum.xda-developers.com/ga...recovery-twrp-3-1-0-1-samsung-galaxy-t3581359
or my repack: https://drive.google.com/file/d/1KyX6xZ8WrcNyHo73-lHhU2dZjX0KFJc1/view?usp=sharing
Gapps
http://opengapps.org/
Platform: ARM64
Android: 8.1
Variant: any, usually I'm using micro or nano
Sources
Sources: https://github.com/Lineageos
Kernel: https://github.com/Valera1978/android_kernel_samsung_msm8996
Device: https://github.com/Valera1978/android_device_samsung_gts3llte
Vendor: https://github.com/Valera1978/android_vendor_samsung_gts3llte
Thanks
Thank to my good friend @bonuzzz
Thanks to LineageOS team8
To be honest I didn't know someone uses that 14.1 build. Further builds will not have that issue with spen in landscape mode. I have now working 15.1 build except gps. I don't know what's wrong with it on wifi model. I didn't hurry to upload because I thought nobody used lineage. I will cleanup build and will upload this week later.5
Could you please elaborate this either in a short answer here or put it in the starting post? Since i'd like to get into Lineage OS developement for the 820 variante I'd like to know the reasons ^^
And on topic: Since there simply aren't any alternatives for the 820 I'm currently using LineageOS 14.1 20180301 (ABANDONED) on mine. A bug I encountered there is that the s-pen recognition doesn't rotate with the rest of the screen. Did somebody test the s-pen with this LineageOS 15.1 (825)? Is the bug also present in this ROM?
An example on the bug I'm talking about:
I use the Tablet in portrait mode and then switch to landscape. When I write on the middle of the left in landscape mode (90° right) it actualy puts the writing on top of the middle.
(I don't want feedback or talk about an abbandod project, I simply want to make the devs aware if this is also a problem in their present projects)4
I believe the 820 & 825 are the same, with the exception of the LTE radio, so I'm hoping we can port it to our WiFi version without too much hassle. I'll try to get in touch if I have any luck.4@Valera1978 Is there any possibilty of making a new build for us t820 owners? Unfortunately the dev that was making builds for us, is gone due to his broken tab. Im sure alot of us would appreciate it. I would be willing to test any builds. Unfortunately i dont have the skills to build a rom.
