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** Changed in: linux (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1973676
Title:
flickering and black screen from boot time, no more display after
22.04 upgrade
Status in linux package in Ubuntu:
Incomplete
Bug description:
On an HP x360 Spectre (i7-8565U WhiskeyLake-U GT2 [UHD Graphics 620]),
after upgrading to 22.04 from 21.10, the display goes to some
flickering lines in black and grey or colors (remember the artifacts
on Amstrad CPC or C64 when loading from a tape? Same here...).
After the initial grub menu, the kernel loads and boots. There are a
few lines of log when the screen is in text mode. As soon as the
plymouth screen comes in, the screen starts flickering massively.
Nothing appeared on the screen except horizontal lines. I have an
encrypted partition, so I type in the password and then the screen
goes to flickering lines in color when Wayland starts.
I tried different kernels:
- 5.17.8: failed
- 5.15.x: all failed (from Ubuntu 22.04)
- 5.13.19: works and back to normal
I found the following errors in the logs:
* i915 0000:00:02.0: [drm] *ERROR* Atomic update failure on pipe A
(start=43426 end=43427) time 300 us, min 2146, max 2159, scanline start 2131,
end 2171
* i915 0000:00:02.0: [drm] Finished loading DMC firmware
i915/kbl_dmc_ver1_04.bin (v1.4)
* i915 0000:00:02.0: [drm] [ENCODER:102:DDI B/PHY B] is disabled/in DSI mode
with an ungated DDI clock, gate it
* i915 0000:00:02.0: [drm] [ENCODER:113:DDI C/PHY C] is disabled/in DSI mode
with an ungated DDI clock, gate it
* i915 0000:00:02.0: [drm] *ERROR* CPU pipe A FIFO underrun
So the problem is > 5.13.x series
I temporarily solved it by downgrading to 5.13.19 from ubuntu mainline
on a newly updated ubuntu 22.04! But it seems the bug affects all the
kernels.
It might be related to
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1958191
Info:
Description: Ubuntu 22.04 LTS
Release: 22.04
linux-image-5.15.0-30-generic:
Installed: 5.15.0-30.31
Candidate: 5.15.0-30.31
Version table:
*** 5.15.0-30.31 500
500 http://au.archive.ubuntu.com/ubuntu jammy-updates/main amd64
Packages
100 /var/lib/dpkg/status
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