Please test latest mainline kernel:
https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.10-rc2/amd64/
** Changed in: linux (Ubuntu)
Status: Confirmed => Incomplete
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https://bugs.launchpad.net/bugs/1901505
Title:
upgrade to 20.10 broke haswell laptop (no regular boot, no
/dev/dri/card0)
Status in linux package in Ubuntu:
Incomplete
Bug description:
Laptop installed with kubuntu focal is not booting after upgrade to
20.10 (that apparently went smooth without any error).
- laptop hangs on boot
- no splash screen is displayed
- laptop can boot in recovery mode
- in this case you do not get /dev/dri/card0 - if X is started it starts on
llvmpipe
- i915 driver is loaded, no error about it in journal or dmesg
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