[HP Probook 450 G6] Laptop Monitor Turns off During Startup, but older kernel versions work (updated system log)
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux-signed-hwe-5.11 (Ubuntu) |
Confirmed
|
Undecided
|
Unassigned | ||
linux-signed-hwe-5.8 (Ubuntu) |
Confirmed
|
Undecided
|
Unassigned |
Bug Description
I had previously submitted this bug here: https:/
While starting the my laptop
(Computer Model: HP Probook 450 G6
ProdID 5YH15UT#ABA
Memory: 15.5 GB
Processor: Intel Core i7-8565U CPU @ 1.80GHz x 8
Graphics: NV118 / Mesa Intel UHD Graphics 620 (WHL GT2)
Disk Capacity: 256.1 GB)
which runs
(OS Name: Ubuntu 20.04.2 LTS
OS Type: 64-bit
GNOME Version: 3.36.8
Windowing System: X11)
the monitor turns off as soon as Ubuntu loads. The OS loads as normal and my external monitor still works, but my laptop monitor does not. I was able to fix the problem by pressing ESC as soon as the HP logo appears during start-up, then selecting "Advanced Ubuntu Options", then choosing an older version of Ubuntu (currently that's ...5.4.0-48..., while I believe the latest version is ...5.8.0-66...).
It seems clear that this problem is caused by a bug that was introduced in one of the more recent updates (...5.8.0-59..., maybe?). I am not at all sure that the problem is in xorg; the package identification webpage just suggested that, if the monitor is blank when I would expect to see the Ubuntu logo during startup, then I should say that the relevant package is xorg.
I am more than happy to run additional diagnostics that you would recommend if that would help you diagnose and fix the problem.
Thank you.
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linux-image-
ProcVersionSign
Uname: Linux 5.11.0-25-generic x86_64
ApportVersion: 2.20.11-
Architecture: amd64
CasperMD5CheckR
CurrentDesktop: ubuntu:GNOME
Date: Fri Aug 6 10:34:40 2021
InstallationDate: Installed on 2021-07-06 (30 days ago)
InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
SourcePackage: linux-signed-
UpgradeStatus: No upgrade log present (probably fresh install)
tags: | added: regression-update |
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
Using 5.8.0-63 (or 5.11.0-25) the internal display is black - but the system is running "normal" (ssh, HDMI display)