Open rnayabed opened 3 years ago
Thanks for reporting. I have 2 additional questions:
raspi-config
tool allowed switching between fkms and kms easily. But since bullseye it looks like they have removed ability to switch to fkms from the raspi-config
tool.You can still change to fkms on the latest version by adding dtoverlay=vc4-fkms-v3d
in /boot/config.txt
. To use KMS, simply use dtoverlay=vc4-kms-v3d
instead.
FKMS is fake KMS, and it looks like the default version of raspbian now uses the KMS driver by default and not the FKMS driver.
video=HDMI-A-1:1024x600M@60D
at the end of /boot/cmdline.txt
without any Line endings or else the display didn't work in KMS mode. (It worked in FKMS mode without this modification because FKMS doesn't support hotplugging anyways)@johanvos
Thanks, I'll have a look later.
OS: Raspberry Pi OS 32-Bit Bullseye
When running with 18-ea+7 on
vc4-fkms-v3d
FKMS, everything works fine and proceeds perfectly:However, when using
vc4-kms-v3d
(KMS) driver:Contents of
hs_err_pid887.log
: