Fyi: i booted from a Live USB stick on a HP EliteBok 745 G6 (also AMD-
based) machine with Kubuntu 20.10. The scrambled screen was the same
one, there.
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I do not use standard Ubuntu at the moment. So, I cannot say for it.
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https://bugs.launchpad.net/bugs/1887728
Title:
[amdgpu] Scrumbled screen after standby on encrypted
I installed Manjaro KDE and I saw the issue there either even if I tried 2
newer kernel versions there.
I installed today a fresh conpy of Kubuntu 20.04 again. The problem is the same.
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Do you see the issue on Ubuntu proper?
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https://bugs.launchpad.net/bugs/1887728
Title:
[amdgpu] Scrumbled screen after standby on encrypted system
Status in linux package
Disk encryption should have no influence on display corruption. Most
likely something else about the machine changed around the same time you
enabled encryption.
** Changed in: linux (Ubuntu)
Status: Incomplete => New
** Changed in: xserver-xorg-video-amdgpu (Ubuntu)
Status:
Remark: this problems only ocurrs in encrypted Kubuntu (LVM). Without
encryption it was OK.
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https://bugs.launchpad.net/bugs/1887728
Title:
[amdgpu] Scrumbled screen after
I installed kernel 5.7.9. The scramble screen did not change.
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https://bugs.launchpad.net/bugs/1887728
Title:
[amdgpu] Scrumbled screen after standby on encrypted system
Looks like a problem caused by the amdgpu driver. So first we need to
see if the kernel part of the driver already has a fix for this. Please
try installing a newer kernel like 5.8-rc5 or 5.7.9:
https://kernel.ubuntu.com/~kernel-ppa/mainline/?C=M;O=D
** Changed in: xserver-xorg-video-amdgpu
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