I tested with another ATI GPU, the Radeon HD 4670 (AGP) one, an high-end TeraScale 1 generation card. The computer did not manage to display the desktop, the dmesg was full of errors about GPU lockup, and I did not managed to reboot properly the computer (had to uses magic SysRq keys).
I tested with an Nvidia GPU, the GeForce 8400 GS rev.2 (PCI), a low-end Tesla 1.0 generation card, running nouveau. The computer did not manage to display the desktop (but displayed garbage instead). Though, I noticed nothing relevant in dmesg and could reboot properly from another host through SSH. I entirely reinstalled the 5.4.0-48-generic kernel and modules packages, regenerated initramfs, problem is still there. I noticed that at the time the 5.4.0-48-generic kernel was installed many other packages were upgraded as well (including some related to firmwares and initramfs) so to rules them out I regenerated the 5.4.0-47-generic again, making sure this one is generated against the same files and with the same tools, and I still don't reproduce the bug on 5.4.0-47-generic kernel. So, that looks really kernel related, all the other packages are the same, and when using other kernel, that other kernel runs with exact same files or files generated with exact same tools without reproducing the bug. I also tested the system on another computer but could not reproduce the bug on that other computer. So, it looks like the bug is tied to the 5.4.0-48-generic kernel on that particular hardware. This bug makes Ubuntu 20.04 and this hardware completely unusable once the 5.4.0-48-generic kernel is installed and used. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1899304 Title: Huge performance regression, Unvanquished game goes from 70fps to 7fps, GNOME Shell never finishes to load, GNOME desktop unusable To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1899304/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
