I tried setting
/sys/class/drm/card1/device/power_dpm_force_performance_level to "low",
letting the display go into power save and woke it up. Same garbled
display.
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I tried updating the amdgpu firmwares from the linux-firmware package
from git.kernel.org. This didn't help. The display is still garbled
after it returns from power-save of the display (not the computer
suspending).
Firmware versions on linux 6.8.0-50 before my upgrade (and kernel
upgrade);
VCE
I cleaned out some boot parameters, didn't change the issue.
kernel: Command line: BOOT_IMAGE=/boot/vmlinuz-6.8.0-50-generic
root=UUID=661d6386-e112-48a0-81dd-12c0344b2d22 ro splash quiet
net.ifnames=0 amdgpu.ppfeaturemask=0x
crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M
This morning the display wasn't garbled. I can't find any change in
dpkg.log or elsewhere, which is confusing. I was hoping this could be
100% reproduced, now we are at maybe 98%.
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** Description changed:
- When power management turns off the sc een, and I wake it I get a
+ When power management turns off the screen, and I wake it I get a
garbled screen. There's a divider in the middle and green streaks from
the right margin and the middle divider over the garbled backgr
** Description changed:
-
- When power management turns of the screen, and I wake it I get a garbled
screen. There's a divider in the middle and green streaks from the right margin
and the middle divider over the garbled background image.
+ When power management turns off the screen, and I wake
** Attachment removed: "CurrentDmesg.txt"
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-amdgpu/+bug/2091205/+attachment/5842730/+files/CurrentDmesg.txt
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Public bug reported:
When power management turns of the screen, and I wake it I get a garbled
screen. There's a divider in the middle and green streaks from the right margin
and the middle divider over the garbled background image.
I am able to login blindly, and removing and inserting the HDM
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