SonixQMK/qmk_firmware

[Bug] Keychron K8: Backlight flashes and flickers column on key press

warhuhn opened this issue · 7 comments

warhuhn commented

Describe the Bug

I'm on the sn32_develop branch

So, if i'm in plain backlight mode, and press down a key, the backlight for that column's keys flickers.

It's much more noticable on the left side of the keyboards. For example, if i press the left control key, i can very clearly see the backlight for the escape key flicker.

The strength of the flickering fades gradually for each columns towards the right, but is still very faintly present even on the last row (right arrow key) if you look very close.

At first i thought i was stuck in a key press mode, but i've used #define DISABLE_RGB_MATRIX_... to disable all modes except plain in the config.h file and the issue persists.

Keyboard Used

qmk compile -kb keychron/k8/rgb/iso -km iso_rgbtest

Link to product page (if applicable)

No response

Operating System

Windows 10

qmk doctor Output

Ψ Found qmk_firmware at D:/projects/qmk_firmware.
Ψ QMK Doctor is checking your environment.
Ψ CLI version: 1.1.1
Ψ QMK home: D:/projects/qmk_firmware
Ψ Detected Windows 10 (10.0.19045).
Ψ QMK MSYS version: 1.7.2
Ψ Git branch: sn32_develop
Ψ Repo version: 0.7.101
⚠ Git has unstashed/uncommitted changes.
⚠ The official repository does not seem to be configured as git remote "upstream".
Ψ All dependencies are installed.
Ψ Found arm-none-eabi-gcc version 10.1.0
Ψ Found avr-gcc version 8.5.0
Ψ Found avrdude version 7.0
Ψ Found dfu-programmer version 0.7.2
Ψ Found dfu-util version 0.11
Ψ Submodules are up to date.
Ψ Submodule status:
Ψ - lib/chibios: 2023-04-15 13:48:04 +0000 --  (11edb1610)
Ψ - lib/chibios-contrib: 2023-07-21 10:22:38 +0200 --  (5b4836ca)
Ψ - lib/googletest: 2021-06-11 06:37:43 -0700 --  (e2239ee6)
Ψ - lib/lufa: 2022-08-26 12:09:55 +1000 --  (549b97320)
Ψ - lib/vusb: 2022-06-13 09:18:17 +1000 --  (819dbc1)
Ψ - lib/printf: 2022-06-29 23:59:58 +0300 --  (c2e3b4e)
Ψ - lib/pico-sdk: 2023-02-12 20:19:37 +0100 --  (a3398d8)
Ψ - lib/lvgl: 2022-04-11 04:44:53 -0600 --  (e19410f8)
Ψ QMK is ready to go, but minor problems were found

Is AutoHotKey / Karabiner installed

  • AutoHotKey (Windows)
  • Karabiner (macOS)

Other keyboard-related software installed

No response

Additional Context

No response

warhuhn commented

I just checked, the issues present before #344 was merged.

warhuhn commented

If i switch to software pwm, by adding

#define SN32_PWM_CONTROL SOFTWARE_PWM

to my keymap's config.h, the problem becomes very visible. The entire key row lights up white on keypress.

I also tried disabling the keypress feature by adding

#ifdef RGB_MATRIX_KEYPRESSES
#undef RGB_MATRIX_KEYPRESSES
#endif

#ifdef RGB_MATRIX_KEYRELEASES 
#undef RGB_MATRIX_KEYRELEASES
#endif

That disabled the keypress rgb effect modes, but doesn't prevent the rows lighting up.

warhuhn commented

Just reverted back to the original, official firmware from Keychron as a sanity check that i didnt break anything, and LEDs worked as they should.

dexter93 commented

sounds like a bug. However,

Ψ Found arm-none-eabi-gcc version 10.1.0

that version is known to be buggy, please bump to anything over 10.3+

If that doesn't fix the issue, can you try

#define MATRIX_UNSELECT_DRIVE_HIGH

and see if the issue persists?

warhuhn commented 
#define MATRIX_UNSELECT_DRIVE_HIGH

Did indeed fix it!

Does the default configuration need updating?

Or is my board on a different revision?
It says Keychron K8_UK RGB_FTCB_SFGKB Ver2.0_20200701 on the board.

warhuhn commented

I'll also try without that option after updating my gcc, as soon as i figure out how to do that in QMK MSYS.

warhuhn commented

Okay, i've tried compiling without #define MATRIX_UNSELECT_DRIVE_HIGH and a newer gcc version.

Problem still persisted, so the configuration probably needs updating. I'll open a pull request in a moment.

Ψ QMK Doctor is checking your environment.
Ψ CLI version: 1.1.2
Ψ QMK home: /home/suigintou/Projekte/sonix-qmk
Ψ Detected Linux (openSUSE Tumbleweed).
Ψ Git branch: sn32_develop
Ψ Repo version: 0.7.101
⚠ The official repository does not seem to be configured as git remote "upstream".
Ψ CLI installed in virtualenv.
Ψ All dependencies are installed.
Ψ Found arm-none-eabi-gcc version 12
Ψ Found avr-gcc version 12
⚠ We do not recommend avr-gcc newer than 8. Downgrading to 8.x is recommended.
Ψ Found avrdude version 7.1
Ψ Found dfu-programmer version 0.7.2
Ψ Found dfu-util version 0.11
Ψ Submodules are up to date.
Ψ Submodule status:
Ψ - lib/chibios: 2023-04-15 13:48:04 +0000 --  (11edb1610)
Ψ - lib/chibios-contrib: 2023-07-21 10:22:38 +0200 --  (5b4836ca)
Ψ - lib/googletest: 2021-06-11 06:37:43 -0700 --  (e2239ee6)
Ψ - lib/lufa: 2022-08-26 12:09:55 +1000 --  (549b97320)
Ψ - lib/vusb: 2022-06-13 09:18:17 +1000 --  (819dbc1)
Ψ - lib/printf: 2022-06-29 23:59:58 +0300 --  (c2e3b4e)
Ψ - lib/pico-sdk: 2023-02-12 20:19:37 +0100 --  (a3398d8)
Ψ - lib/lvgl: 2022-04-11 04:44:53 -0600 --  (e19410f8)
Ψ QMK is ready to go, but minor problems were found