apport information ** Attachment added: "ProcCpuinfoMinimal.txt" https://bugs.launchpad.net/bugs/2016706/+attachment/5664775/+files/ProcCpuinfoMinimal.txt
-- 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/2016706 Title: The 5.19 kernel backport is broken Status in linux package in Ubuntu: Confirmed Bug description: The latest 5.19 backport which migrated from 22.10 to 22.04 is broken on arm64. The kernel team decided to include the following change: 5e0137612430 ("video/aperture: Disable and unregister sysfb devices via aperture helpers") it's the change 89314ff239e1933357419fa91b20190150f114a8 in the kinetic kernel repo. This change was part of a much larger series that was making sure that fb devices were properly releasing the pci resources which is necessary for proper drivers to load. Because the backport misses all those other changes it breaks PCI resource release for efifb and prevents specific drivers (e.g. vmwgfx) from being loaded. It doesn't affect many other arm64 systems because most arm64 system don't have dedicated PCI gpu's, like vmwgfx is, which is presumably why it was missed. Without the rest of the changes in that series efifb won't release BAR 2, which results in : vmwgfx 0000:00:0f.0 BAR 2: can't reserve [mem 0x7000000-0x77ffffff 64bit pref] and a black screen on boot. Because the way drm drivers work is that first they unload the legacy fb drivers, in this case efifb, and then they continue their own initialization. In this case vmwgfx can't initialize because even though efifb has been unloaded it never released the resource at BAR 2, so vmwgfx can't claim it. Currently there's no mechanism in the kernel to reload the original generic fb driver in case the specific gpu driver fails the initialization. This results in black screen on booth with vmware hypervisor on arm64 and Ubuntu's 5.19 kernel. To fix it either the above mentioned change needs to be backed out or the rest of the patches from that series needs to be backported as well. --- ProblemType: Bug ApportVersion: 2.20.11-0ubuntu82.4 Architecture: arm64 AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/controlC0', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: CasperMD5CheckResult: pass DistroRelease: Ubuntu 22.04 InstallationDate: Installed on 2022-01-13 (459 days ago) InstallationMedia: Ubuntu 22.04 LTS "Jammy Jellyfish" - Alpha arm64 (20220112) IwConfig: lo no wireless extensions. ens160 no wireless extensions. MachineType: VMware, Inc. VMware20,1 Package: linux (not installed) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.19.0-38-generic root=UUID=cd59243b-41f9-4a96-9a57-315489304b3e ro console=tty0 console=ttyS0,115200n8 drm.debug=0x2 quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 5.19.0-38.39~22.04.1-generic 5.19.17 RelatedPackageVersions: linux-restricted-modules-5.19.0-38-generic N/A linux-backports-modules-5.19.0-38-generic N/A linux-firmware 20220329.git681281e4-0ubuntu3.12 RfKill: Tags: jammy Uname: Linux 5.19.0-38-generic aarch64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 03/31/2023 dmi.bios.vendor: VMware, Inc. dmi.bios.version: VMW201.00V.21529217.BA64.2303311427 dmi.board.name: VBSA dmi.board.vendor: VMware, Inc. dmi.board.version: 1 dmi.chassis.type: 1 dmi.chassis.vendor: VMware, Inc. dmi.chassis.version: VMware20,1 dmi.modalias: dmi:bvnVMware,Inc.:bvrVMW201.00V.21529217.BA64.2303311427:bd03/31/2023:svnVMware,Inc.:pnVMware20,1:pvr1:rvnVMware,Inc.:rnVBSA:rvr1:cvnVMware,Inc.:ct1:cvrVMware20,1:sku0000000000000001: dmi.product.family: VMware dmi.product.name: VMware20,1 dmi.product.sku: 0000000000000001 dmi.product.version: 1 dmi.sys.vendor: VMware, Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2016706/+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
