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
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-signed-hwe-5.11 in Ubuntu. https://bugs.launchpad.net/bugs/1939160 Title: [HP Probook 450 G6] Laptop Monitor Turns off During Startup, but older kernel versions work (updated system log) Status in linux-signed-hwe-5.11 package in Ubuntu: Confirmed Status in linux-signed-hwe-5.8 package in Ubuntu: Confirmed Bug description: I had previously submitted this bug here: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1937914 , but I submitted a system log from an older, working version of Ubuntu rather than from the failing version. This report has the updated log. 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-5.11.0-25-generic 5.11.0-25.27~20.04.1 ProcVersionSignature: Ubuntu 5.11.0-25.27~20.04.1-generic 5.11.22 Uname: Linux 5.11.0-25-generic x86_64 ApportVersion: 2.20.11-0ubuntu27.18 Architecture: amd64 CasperMD5CheckResult: skip 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-hwe-5.11 UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-signed-hwe-5.11/+bug/1939160/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
