This bug is awaiting verification that the kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed- hirsute' to 'verification-done-hirsute'. If the problem still exists, change the tag 'verification-needed-hirsute' to 'verification-failed- hirsute'.
If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you! ** Tags added: verification-needed-hirsute -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1929217 Title: Select correct boot VGA when BIOS doesn't do it properly Status in HWE Next: New Status in linux package in Ubuntu: Confirmed Status in linux-oem-5.10 package in Ubuntu: Invalid Status in linux source package in Focal: Won't Fix Status in linux-oem-5.10 source package in Focal: Confirmed Status in linux source package in Hirsute: Fix Committed Status in linux-oem-5.10 source package in Hirsute: Invalid Bug description: [Impact] On HP EliteDesk 805 G7 desktop, when a add-in discrete GFX card is present but the display is connected to integrated GPU, BIOS cannot find the correct boot VGA. Hence, wrong OpenGL/Vulkan library is used, makes the desktop environment very laggy. [Fix] The current heuristic picks the fallback VGA device with lowest PCI device number. Based on the current heuristic, also check for ACPI video device which should be the integrated VGA device. [Test] Check if the integrated GPU is the boot VGA: $ cat /sys/bus/pci/devices/0000\:08\:00.0/boot_vga 0 After applying the patch: $ cat /sys/bus/pci/devices/0000\:08\:00.0/boot_vga 1 [Where problems could occur] When there are multiple GPUs that are ACPI video devices, and BIOS failed to find a VGA to POST, the new heuristic introduces new behavior. Since multiple ACPI video devices are on laptops, the EFI base should already be correct otherwise there's no POST. If that really happens the laptop is completely broken at first place. To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1929217/+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
