solved with newest 5.11.0-38-generic kernel update (Ubuntu20.04.3)
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https://bugs.launchpad.net/bugs/1939160
Title:
[HP Probook 450 G6] Laptop Monitor Turns off During Startup, but
This might be related to https://gitlab.freedesktop.org/drm/intel/-/issues/3569
HP ProBook 450 G6, HP ProbBok 450 G7, HP EliteBook 850 G5, HP OMEN 15
(dc-0019ur)
HP ProBook 450 G6 shows:
sudo lspci -kv
00:02.0 VGA compatible controller: Intel Corporation UHD Graphics 620 (Whiskey
Lake) (rev
Exact same behaviour for me and my collegues on HP Probook 450 G7:
HP ProBook 450 G7 (8VU58EA#ACB)
CPU: Intel(R) Core(TM) i7-10510U CPU @ 1.80GHz
RAM: 16Gb
GPU: Intel UDH Graphics
Disk: SSD WDC PC SN520 SDAPNUW-512G-1006
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Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: linux-signed-hwe-5.8 (Ubuntu)
Status: New => Confirmed
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** Tags added: regression-update
** Also affects: linux-signed-hwe-5.8 (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1939160
Title:
[HP Probook
I added:
prevboot1.txt (5.8.0-63)
prevboot2.txt (5.11.0-25)
prevboot3.txt (5.8.0-55)
using
journalctl -b-1 > prevboot1.txt
...
** Attachment added: "prevboot1-5.tar.gz"
** Attachment removed: "prevboot1.txt .. prevboot5.txt"
https://bugs.launchpad.net/ubuntu/+source/linux-signed-hwe-5.11/+bug/1939160/+attachment/5516795/+files/prevboot1-5.tar.gz
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I did stop gdm3 and created Xorg.log (via ssh and startx) for 5.8.0-55 (which
is fine) and 5.8.0-63 (where the internal display is black).
EDID & modelines do look the same, input/event are numbered differently,
SynPS/2 Synaptics TouchPad (*-63) vs PS/2 Generic Mouse (*-55)
** Attachment
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: linux-signed-hwe-5.11 (Ubuntu)
Status: New => Confirmed
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It looks like https://bugs.launchpad.net/ubuntu/+source/linux-
hwe-5.8/+bug/1934647 is about the same. Here it's Intel UHD Graphics 620
- there it's about nvidia.
5.8.0-55 is fine
5.8.0-63 is affected
5.11.0-25 is affected
I did
journalctl -b-1 > prevboot1.txt
journalctl -b-2 > prevboot2.txt
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