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

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ugene1980

Senior Member
Dec 18, 2012
119
142
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
 
Last edited:

954wrecker

Senior Member
Jul 9, 2012
3,166
1,550
Flashed it on the indian rom and it's working good so far.
 

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Sif1110

Member
Sep 8, 2016
22
0
This was released by a two Chinese developers ZhenXin and Andy Chang, The 90hz mod should be coming soon as well

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 working perfectly
- Minimal battery drain due to slight overclock from original(60hz)

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
- 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
- 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
==================================
Does it requires root or only bootloader unlocked.
Can i use it without root?
 

majimbo

Member
Sep 21, 2016
19
6
This was released by a two Chinese developers ZhenXin and Andy Chang, The 90hz mod should be coming soon as well

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 working perfectly
- Minimal battery drain due to slight overclock from original(60hz)

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
- 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
- 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 4796510
View attachment 4796522


Any inconvenience like the green tint in Mi 9? Low/distorted colors?

Will it be possible to overclock up to 84hz like Mi 9?
 
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ugene1980

Senior Member
Dec 18, 2012
119
142
Does it requires root or only bootloader unlocked.
Can i use it without root?

- Flash via fastboot or twrp = requires bootloader unlocked
- Flash via the Lanthanum System Toolbox app = requires root

Any inconvenience like the green tint in Mi 9? Low/distorted colors?
Will it be possible to overclock up to 84hz like Mi 9?

- No green tint at low brightness so far for me
- Developer hinted at a 90hz mod which will come out late, personally i think 75hz is a great value compromise , minimal battery drain and much smoother than 60hz
 
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Schnedi

Senior Member
Oct 27, 2011
954
2,413
I tried it in a GSI ROM, it didn't work of course x-D

Bootloop to fastboot, had to restore the backup.

I knew it wasn't going to work because backed up DTBO is 32MB in GSIs, but I wanted to be sure.
 

majimbo

Member
Sep 21, 2016
19
6
- Flash via fastboot or twrp = requires bootloader unlocked
- Flash via the Lanthanum System Toolbox app = requires root



- No green tint at low brightness so far for me
- Developer hinted at a 90hz mod which will come out late, personally i think 75hz is a great value compromise , minimal battery drain and much smoother than 60hz

Perfect, flashed and working on Xiaomi.eu 10.3.15. :good:
 

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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