[MOD][ROOT] Overclock your screen to 75hz refresh rate (other refresh rates later)

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Joacoking

Member
Apr 27, 2017
7
2
Advice from you, Guys

Hello!
My phone details are show in the attachment, I have the stock Global ROM, with Android 9 MIUI 10, and the update to Android 10 MIUI 11 is ready to download. It is not unlocked yet, but I could do it.

What file should I flash, if I want 75Hz or 90Hz?

Thanks!
 

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jamalikos1

Member
Aug 8, 2019
34
13
There seems to be a little green tint on the screen with this mod.

really???in my phone everything works great....
maybe you must work the gpu a little higher in my case i work my gpu 499mhz- 585mhz
and i dont have any lags in scroll
 

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Peter the Great

Senior Member
Nov 27, 2019
137
95
There seems to be a little green tint on the screen with this mod.
Any tint can be nullified by going into Settings > Display > LiveDisplay > Color Calibration, then setting the green value lower. Try placing a different display (like a colour accurate monitor) beside your phone, and see if you can match the colour white of the separate display, with the white part of the bar at the bottom of the window on the phone (see screenshot for better idea).
 

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Mordar

Senior Member
Sep 11, 2012
94
7
Hey Guys, unfortunately while installing the 81hz DTBO mod while on Miui.eu miui 12 rom got my device soft bricket (can't access TWRP at all and only get to fastboot), please don't try to install any 75hz and up mods on MIUI 12 or this could happen to you.

Is there a step by step guide on how to get out of this predicament? I don't have experience with ADB tools other than installing TWRP and I've never in the past got my devices brick, this is my first time ever....

Edit: managed to save my device by doing a fastboot flash dtbo dtbo.img (the dtbo.img I got it from the miui rom I had on my hard drive) following this guide https://forum.xda-developers.com/mi-9t/help/flash-stuck-fastboot-soft-brick-t3962662

fyi: Do not try to install any of the mods at the first page of this thread with MIUI 12, they don't seem to work :(
 
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DoniStunts

Senior Member
Sep 5, 2016
123
25
Well, it seems immensity removed OC support on latest update with 2.0, I reverted to 25 may build and OC works perfectly but the LOS FOD implementations are lost... such a shame
 

XblackdemonX

Senior Member
May 27, 2008
1,808
529
Montreal
Hey Guys, unfortunately while installing the 81hz DTBO mod while on Miui.eu miui 12 rom got my device soft bricket (can't access TWRP at all and only get to fastboot), please don't try to install any 75hz and up mods on MIUI 12 or this could happen to you.

Is there a step by step guide on how to get out of this predicament?

Just flash back the original DTBO image. EASY as 1,2,3
 
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  • 72
    This was released by a two Chinese developers ZhenXin(@realheart) and Andy Chang(@atomsand)

    Current released mods: 75hz & 81hz (For Android 9) and 66hz/69hz/72hz (For Android 10)

    Android 9 Mods Currently works/tested on:
    - Chinese dev rom 9.7.11 and below ONLY (xiaomi.eu weekly works too as it is based on the chinese dev rom)
    - Chinese stable rom 10.3.16 and below ONLY (xiaomi.eu stable works too as it is based on the chinese stable rom)
    - Global/Indian stable rom 10.3.3.0 - see here thanks @954wrecker
    - I tested it on xiaomi.eu 9.7.4 (imho the most stable version) on a China set K20 Pro 8gb+128gb
    - 75hz and 81hz both working perfectly
    - Minimal battery drain due to slight overclock from original(60hz) for the 75hz version, 81hz seems minimal as well

    Android 10 Mods Currently works/tested on:
    - 9.8.15 working well​

    Use it at your own risk! It is unknown if it causes any long term or temporary damage to the screen yet. (But since it uses the same screen as the mi9, which has the same mod released a while back, it should be fine!)

    ==================================
    USAGE INSTRUCTIONS
    ==================================

    MAKE A BACKUP OF DTBO PARTITION FIRST!! (Two Methods choose one)
    >>>Via TWRP
    - Boot to TWRP
    - Select Backup
    - Select only the DTBO partition
    - Select storage location, click backup

    >>>Via Lanthanum System Toolbox App
    - Download the attached Lanthanum System Toolbox.apk file, install the apk, then open it
    - Select partition settings from the hamburger menu
    - Select dtbo, make a backup of it (Export image)

    FLASH THE MOD (Four methods choose one)
    >>>Via TWRP
    - Download the attached dtbo_K20P_75Hz_d2e98.img (or dtbo_K20P_81Hz.img)
    - Copy it to your thumbdrive or phone
    - Boot to TWRP
    - Select install
    - Select install image
    - Choose your image file
    - SELECT DTBO partition to flash the file to
    - Swipe to confirm flash!

    >>>Via Fastboot
    - Connect phone(bootloader mode) to computer
    - Open up command prompt
    - Type fastboot devices to ensure device is connected
    - Type: Fastboot flash dtbo dtbo_K20P_75Hz_d2e98.img (or dtbo_K20P_81Hz.img)
    - Done!

    >>>Via Lanthanum System Toolbox App
    - Download the attached Lanthanum System Toolbox.apk file, install the apk, then open it
    - Select partition settings from the hamburger menu
    - Select dtbo again, click flash image, and choose the dtbo.img file
    -Reboot

    >>>Via Magisk module
    - Coming soon, will update once I downloaded it

    You should see the changes immediately after the restart. It's way smoother than before.
    If you want to go back to default, flash your backed up dtbo image file either via fastboot or TWRP restore partiton

    ==================================
    DOWNLOAD
    ==================================
    View attachment Lanthanum_System_Toolbox.apk
    For Android 9:
    View attachment dtbo_K20P_75Hz_d2e98.img
    View attachment dtbo_K20P_81Hz.img
    For Android 10:
    View attachment dtbo_K20Pro_(Q)_60hz.zip
    View attachment dtbo_K20Pro_(Q)_66hz.img
    View attachment dtbo_K20Pro_(Q)_69hz.img
    View attachment dtbo_K20Pro_(Q)_72hz.img
    8
    Decided to invest some time and reverse engineer the patch real quick to see what makes it tick and what keeps it from working on Global units.

    Turns out the whole dtbo.img is completely different.
    In fact, the dtbo.img of Global units is nearly double the size of the Chinese variants.

    I quickly realized that getting this running on Global units (and maybe EEA?) would require people to provide their own dtbo.img (for whatever region their device is from), and apply this patch on top of it.

    As part of that I created a simple patcher tool onto which you drag your dtbo.img file to get it patched to 81Hz, once done you'd just flash the patched dtbo.img.out file the tool spits out.

    I'd provide the link but XDA is brutal about Patreon and other external links. For those that really want to find it though, it's easy enough just googling for my Black-Seraph username.
    8
    Hello friends,

    I've removed some posts with rude language and off topic discussion.
    Please keep in mind to discuss on topic and without offending others:)
    Please be friendly to members and report with prove/logs/facts instead of reply/engage without content.

    I recommend to read the FORUM RULES.


    Regards!

    strongst
    Forum Moderator
    6
    Just install immensity kernel and this dtbo and you will have 75hz working everywhere with no green tint and no need to disable hw overlays and DC anti flickering no frame drops and works with all ROMs.

    Btw immensity kernel got no bugs at all now, boosts performance in an unbelievable way and is the only way to let this 75hz dtbo work properly on Raphael (tried with can based firmware Xiaomi.eu 11.0.5 and European global firmware, if you install this kernel the dtbo works , otherwise no way). This is actually the best way to have refresh oberxlocked with no issues

    Finally it works with l1 hdr and netflix also, all problems solved, I suggest manually installing also dual speaker XML mixer files in system vendor etc folder setting permissions rw-r-r 0644 to enjoy the greatest possible experience

    Use with root es file explorer to move files in root and set permission using the option properties

    All files attached , dtbo must be unzipped and use the image to flash it through twrp


    Also install in magisk 320kbps audio bitrate (normally is 96).

    If you can install viper as well use it with tube amplifier convoiler with -14db master audio and you ll enjoy something exceptional

    Of course need selinux switched on permissive, ADB and busybox installed, audio modification library then install viper drivers and set it as you like, if driver installation fails try and retry , maybe unchecking in magisk modules the aml
    5
    Does this mod make only the screen refresh more frequently or does this mean the touch screen digitizer also samples more frequently?

    At launch the digitizer was touted to be 180hz, it was throttled to 60hz in newer firmware.
    This mod increases the touch frequency to match the response rate (either 75 or 81)
    OHNUqDc.jpg

    You can test yours using this app: View attachment dc.xyn.touchrequency1.2.apk

    Would i work on further versions of miui if someone managed to port the adreno drivers?

    Yup, the dev is working on porting adreno drivers so it can be used on newer eu weeklies/newer china dev rom
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