The fix is included in kernel 5.15.0-34.35. The daily image should have the kernel soon.
-- 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/1968519 Title: [Lenovo Ubuntu 22.04 Bug]The Physical VGA displayer shows no signal (black screen) when install Ubuntu 22.04 Status in linux package in Ubuntu: Confirmed Bug description: Description: When we install Ubuntu 22.04, the physical VGA displayer show black screen. It can only show rarely boot logs just for few seconds after kebyboard Enter key be pressed to install Ubuntu OS, and then the physical VGA displayer keeps black screen, but the XCC remote KVM monitor can show the boot log and the GUI interface. Produce Steps: 1. Connect a physical VGA displayer. 2. Fresh install Ubuntu22.04 on a server that integrated Matrox MGA G200-family. 3. When the install menu comes out, press keyboard Enter key, the physical VGA displayer just get the signal for few seconds and then the monitor go to black screen. Configuration: Systems：Lenovo SR590, SR650, SR630 with magag200 as GFX OS:jammy-live-server20220405-amd64.iso CPU:Intel(R) Xeon(R) Bronze 3104 CPU @ 1.70GHz UEFI:3.30 (Build ID: IVE178D) XCC:1.30 (Build ID: PDL114N) HDD:1.00TB 7.2K 6Gbps SATA 3.5" HD Actual results: The VGA display keep the black screen, during Ubuntu 22.04 installation. Expected results: The VGA display is OK when install the Ubuntu 22.04 in a server that integrated Matrox MGA G200-family video processor Additional info: 1. The issue can be reproduced 100% in the server that integrated Matrox MGA G200-family platforms. 2. Both UEFI mode and legacy mode are failed. 3. After we finish installing Ubuntu OS through XCC remote KVM monitor, and reboot the system, the physical VGA displayer still show nothing after a few seconds. 4. We did more tests, modified the cmdline of the kernel, add "nomodeset", the VGA displayer display well. 5. This issue could be found on both Intel and AMD platforms , which have onboard video chip as mgag200, also called pilot 4. 6. Upstream kernel patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?h=v5.18-rc1&id=147696720eca12ae48d020726208b9a61cdd80bc (drm/mgag200: Select clock in PLL update functions) probalby resovle the issue on BIOS legacy mode. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1968519/+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
