Installed the released kernel now available from updates. All works as expected. The HWE 22.10 kernel also works in 22.04.2.
The 22.04.2 ISO installer still has a 5.19.0-32 kernel, though. It exhibits the blank screen issue when choosing the "Ubuntu Server with HWE kernel" installer option. I suspect that issue will get fixed in 22.04.3, but this issue can be easily worked around. Thanks to all of the Ubuntu crew for delivering this fix. -- 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/2007001 Title: vmwgfx fails to reserve graphics buffer on aarch64 leading to blank display Status in linux package in Ubuntu: Fix Released Status in linux source package in Kinetic: Fix Released Bug description: BugLink: https://bugs.launchpad.net/bugs/2007001 [Impact] Numerous VMWare users have reported that vmwgfx cannot reserve the memory region for the graphics framebuffer, leading their VMs to have blank screens. They see the following in dmesg: [ 11.135360] vmwgfx 0000:00:0f.0: BAR 2: can't reserve [mem 0x70000000-0x77ffffff 64bit pref] [ 11.135366] vmwgfx: probe of 0000:00:0f.0 failed with error -16 And a cat /proc/iomem shows this: 50000000-7fffffff : PCI Bus 0000:00 70000000-77ffffff : 0000:00:0f.0 70000000-702fffff : BOOTFB The kernel has failed to release this memory region for vmwgfx to occupy. Most affected users are on aarch64, with the host being Apple silicon systems. [Fix] The regression was introduced by the below commit in 5.19.0-30-generic: commit 5e01376124309b4dbd30d413f43c0d9c2f60edea Author: Thomas Zimmermann <tzimmerm...@suse.de> Date: Mon Jul 18 09:23:18 2022 +0200 Subject: video/aperture: Disable and unregister sysfb devices via aperture helpers Link: https://github.com/torvalds/linux/commit/5e01376124309b4dbd30d413f43c0d9c2f60edea This commit was part of a larger refactoring of the video subsystem, and requires the entire series to function correctly. You can review the whole series below: https://patchwork.freedesktop.org/series/106040/ The patch series also requires quite a few additional fixups to fix bugs introduced by the series, making the size about 15 commits in total. The contents of the series don't really fix any bugs, and their purpose is to refactor the code for future changes to the fbdev subsystem, and really aren't appropriate to be backported to a stable kernel series. "video/aperture: Disable and unregister sysfb devices via aperture helpers" seems to have been selected for -stable by mistake by its fixes: tag, and was pulled into upstream stable by a robot with little human review. The best course of action is to revert. No action needed for Lunar, as the entire series is present in that release. [Testcase] This bug affects users running Ubuntu in VMWare VMs, notably on aarch64 devices, like modern Apple computers. Start a Kinetic or Jammy-HWE Server or Desktop VM in VMWare Fusion on Apple silicon, and see if the display comes up or not. Affected users will see a blank screen. There is a test kernel available in the following ppa: https://launchpad.net/~mruffell/+archive/ubuntu/lp2007001-test If you install the test kernel and reboot, you will be able to see the screen on your VM like normal. [Where problems could occur] This commit changes when the sysfb is disabled and memory region for the graphics framebuffer is released to the proper device driver. If a regression were to occur, then graphics drivers may fail to reserve the framebuffer memory, and fail to start, leaving users with a blank screen. There are no workarounds, other than booting a previous kernel. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2007001/+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
