aakoskin
commented
1 year ago Rotation works when glamor is enabled (raspi-config, Advanced Options > Enable/disable glamor graphics acceleration).
Closed aakoskin closed 1 year ago
aakoskin
commented
1 year ago Rotation works when glamor is enabled (raspi-config, Advanced Options > Enable/disable glamor graphics acceleration).
XECDesign
commented
1 year ago @popcornmix Is this an issue or is the non-glamour use case no longer supported?
popcornmix
commented
1 year ago I believe using gl is the only way rotation is handled in drm/kms world. So, I would expect rotation to not work when glamor (hence gl rendering) is disabled.
The seg fault shouldn't really happen though. And it might be nice if choosing rotation + no glamor results in a "screen rotation requires glamor, do you want to enable" type dialogue.
aBUGSworstnightmare-rpi
commented
1 year ago I believe using gl is the only way rotation is handled in drm/kms world. So, I would expect rotation to not work when glamor (hence gl rendering) is disabled.
The seg fault shouldn't really happen though. And it might be nice if choosing rotation + no glamor results in a "screen rotation requires glamor, do you want to enable" type dialogue.
Sorry, but can you explain why one would need glamor on devices <2GB RAM in order to rotate the display?
Just posted some results here https://forums.raspberrypi.com/viewtopic.php?p=2094323#p2094323: rotated a display on a Pi3B with no issues - without glamor enabled
aakoskin
commented
1 year ago Just posted some results here https://forums.raspberrypi.com/viewtopic.php?p=2094323#p2094323: rotated a display on a Pi3B with no issues - without glamor enabled
Can you share the Xorg log from the working system?
Just in case, I also tried the 32-bit install image, it was still the same. Then I made a fresh install using 64-bit "Raspberry Pi OS with desktop" image on another RPi3B, using just a HDMI monitor, and again the behavior is the same. Rotation crashes Xorg unless glamor is enabled. I also noticed that during the setup phase, if I select "Reduce the size of the desktop..." with HDMI monitor, there is a similar crash.
So perhaps there is something wrong with the install image? Some module/package/dependency missing etc.
aBUGSworstnightmare-rpi
commented
1 year ago Hmm .. that seems to be 'one time lucky punch'! Tried to replicate it but not possible. X-crashes and restarts with logon-screen.
Sorry, but no idea why it has worked yesterday but refuses to work today. Also tested with a fresh install -> not working.
aakoskin
commented
1 year ago Hmm .. that seems to be 'one time lucky punch'! Tried to replicate it but not possible. X-crashes and restarts with logon-screen.
Sorry, but no idea why it has worked yesterday but refuses to work today. Also tested with a fresh install -> not working.
I found out that it will work if you edit /usr/share/X11/xorg.conf.d/20-noglamor.conf and replace:
Option "AccelMethod" "msdri3"
with
Option "AccelMethod" "none"
It seems that "msdri3" is something that is newly introduced for older Pi devices (< 4), and the previous disable glamor setting was "none". Probably what happened to you was that you played around with raspi-config so that it rewrote the file with that new setting (and the previous file was from an older install, maybe check from a timestamp of the file).
The acceleration option in raspi-config should be tristate: glamor, msdri3 or none. The current one is totally confusing. Also msdri3 should NOT be enabled by default as it clearly has issues.
aakoskin
commented
1 year ago This is probably the change after which the rotation got broken:
xorg-server (2:1.20.11-1+rpt1+deb11u5) bullseye; urgency=medium
* glamor: Avoid using GL_QUADS on V3D
* fb: do not use pixman_blt to perform copies. This is faster on Raspberry
Pi
* modesetting: Add DRI3 support to modesetting without glamor
[ Simon Long ]
* Enable dmabuf by default
-- Rob Thomas <rob.thomas@raspberrypi.com> Thu, 09 Feb 2023 15:15:54 +0000
The issue is now fixed in today's xorg-server update. Great job, thanks!
xorg-server (2:1.20.11-1+rpt3+deb11u6) bullseye; urgency=medium
* modesetting: msdri3 should use dumb buffers for randr
- https://github.com/RPi-Distro/repo/issues/324
[ Rob Thomas ]
* modesetting: Fix DPMS behaviour on all RPi devices
* glamor: Avoid using GL_QUADS on V3D
* fb: do not use pixman_blt to perform copies. This is faster on Raspberry
Pi
* modesetting: Add DRI3 support to modesetting without glamor
[ Simon Long ]
* Enable dmabuf by default
-- Serge Schneider <serge@raspberrypi.com> Thu, 30 Mar 2023 14:46:14 +0100
A fresh up-to-date 64-bit bullseye desktop install on Raspberry Pi 3 Model B with the official 7" touchscreen.
Trying to change the screen orientation with
Preferences > Screen Configuration > Layout > Screens > DSI-1 > Orientation
always results in Xorg server crash. The same happens also when trying with xranrd.
Crash log: