[tde-users] Re: TDE display control messes up colors on RPi with full KMS driver

Hello everyone, I'm running TDE R14.0.12 on Debian 11 (bullseye) using a Raspberry Pi 2B. With the Debian 11 (bullseye) release of the Raspberry Pi OS, the RPi offers 2 display drivers: "vc4-kms-v3d" (full KMS) and "vc4-fkms-v3d" (fake KMS). Till Debian 10 the fake one was default, now it is the full KMS and the fake KMS driver is supposed to be no longer actively supported (though it can still be switched to). The new default driver (full KMS) poses new issues with the display handling of TDE in terms of color (or gamma) management. As soon as TDE's display management is used, the colors get all weird like the whole screen gets rainbow-colored with very low color depth. Here's a photo I took (it doesn't show up on screenshots): https://i.imgur.com/DIaIP9m.jpeg - using xrandr or TDERandRTray to switch resolutions is fine - using the Trinity control center's "System Administration" > "Monitor & Display" > "Enable global display control" will make colors go crazy as shown in the photo - moving the "Hardware Gamma Control" sliders in the control center will alter the shades of rainbow colors but never fixes the general color distortion - using "xrandr --output HDMI-1 --gamma 1:1:1" will fix colors until reboot - when global display control is enabled, this is persistent and colors will go crazy as soon as TDM starts after bootup I'd like to keep the new (full KMS) driver since the old fkms one always had other issues were KMix's audio volumes would scale between -350% and -400% (yes, negative values) while alsamixer being at 50%, effectively preventing any working volume control in TDE since sliders start at 0. This is fixed with the full KMS driver as it handles the audio devices differently. However, with the new driver I can't make permanent adjustments to screen resolutions with TDE (only temporary with RandR) as I encounter the color bug as described above. Is there anything I can do about it? Should I file a bug somewhere?

Best regards, Leskala ____________________________________________________ tde-users mailing list -- users(a)trinitydesktop.org To unsubscribe send an email to users-leave(a)trinitydesktop.org Web mail archive available at https://mail.trinitydesktop.org/mailman3/hyperkitty/list/users@trinitydeskt…