Thanks for sharing the logs.
By comparing them the only relevant difference I noticed is the following one:
* In kernel 6.8.0-11 (which is the one working), the kernel attempts to load
hyperv_fb, but fails:
[ 29.103795] hyperv_fb: No memory for framebuffer
[ 29.104204] hyperv_fb: probe of 5620e0c7-8062-4dce-aeb7-520c7ef76171
failed with error -12
This triggers the fallback to hyperv_drm, which then successfully initializes
a DRM-based framebuffer:
[ 29.222515] hyperv_drm 5620e0c7-8062-4dce-aeb7-520c7ef76171: [drm] fb0:
hyperv_drmdrmfb frame buffer device
* In kernel 6.8.0-62 (which is not working), the kernel successfully loads
hyperv_fb:
[ 20.738004] hyperv_fb: Synthvid Version major 3, minor 5
[ 20.738124] hyperv_fb: Screen resolution: 1024x768, Color depth: 32,
Frame buffer size: 8388608
Therefore there is no hyperv_drm initialization. Thus, the system ends
up using hyperv_fb exclusively, which provides only the default 1024x768
framebuffer, and does not support resolution changes, unlike hyperv_drm.
This change in behavior is due to the following commit:
- 20ee2ae8c589 fbdev/hyperv_fb: Fix logic error for Gen2 VMs in hvfb_getmem()
which fixes the bug that makes hyperv_fb fail.
Moreover, comparing Noble with Debian Unstable, I noticed that in Ubuntu's
config we have:
- CONFIG_FB_HYPERV=m
while in Debian:
- # CONFIG_FB_HYPERV is not set
This is most probably the reason why screen resizing works in Debian but not on
Ubuntu.
To confirm this hypothesis, can you please blacklist the hyperv_fb module on
Noble (6.8 or 6.11 or 6.14) and verify if the problem is still reproducible?
To do this you can execute:
$ echo "blacklist hyperv_fb" | sudo tee /etc/modprobe.d/blacklist-hyperv_fb.conf
$ sudo update-initramfs -u
$ sudo reboot
Confirm that the module is indeed not loaded:
$ lsmod | grep hyperv_fb
$ modprobe --showconfig | grep hyperv_fb
Please execute the steps above and paste here the output of the
commands. Please attach also the dmesg as usual. Thanks
** Changed in: linux-meta-hwe-6.11 (Ubuntu)
Status: Incomplete => Confirmed
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux-meta-hwe-6.11 in Ubuntu.
https://bugs.launchpad.net/bugs/2115068
Title:
Ubuntu 24.04+ arm64: screen resolution fixed to 1024x768 with last
kernel update
Status in linux-meta-hwe-6.11 package in Ubuntu:
Confirmed
Bug description:
Hi,
I have a problem after a kernel update on ubuntu 24.04 arm64. In a few words
up to kernel 6.8.11 everything works well and I can change the screen
resolution. Starting from kernel 6.8.31 (linux-generic), I cannot do it
anymore. I tried manually installing several kernels (for instance
6.8.4-060804-generic) and even linux-generic-hwe (6.11.x).
I did many tests by changing the configuration and following the advice of
the mate community
https://ubuntu-mate.community/t/ubuntu-mate-24-04-screen-resolution-fixed-to-1024x768-with-last-kernel-update/.
However, I came to the conclusions that is something related with ubuntu
(gnome or mate is indifferent).
Indeed, I tried with:
Debian 12.11 with kernel 6.1.x and mate desktop: no problem (expected).
Debian 13 daily build with kernel 6.12.x and mate desktop: no problem.
Fedora 42 workstation with kernel 6.14.x and gnome desktop: no problem.
Ubuntu 24.04 server with kernel 6.8.x and 6.11.x: problem (works only up to
kernel 6.8.11).
Ubuntu 25.04 with kernel 6.14.x and gnome desktop: problem.
I have to mention that my device SoC, Qualcomm Snapdragon 8cx gen 2,
is the only one in the series (gen 1, gen 3 and gen 4
https://bugzilla.kernel.org/show_bug.cgi?id=218512) that is not
supported by the linux kernel. So the only solution I have found to
use my device is to use hyper-v on windows 11 (virtualbox does not
work on arm on windows
https://www.virtualbox.org/manual/topics/Introduction.html#host-guest-
matrix).
Thank you
---
ProblemType: Bug
ApportVersion: 2.28.1-0ubuntu3.7
Architecture: arm64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/seq: test 1846 F.... pipewire
CRDA: N/A
CasperMD5CheckResult: pass
CurrentDesktop: MATE
DistroRelease: Ubuntu 24.04
InstallationDate: Installed on 2024-03-24 (456 days ago)
InstallationMedia: Ubuntu 24.04 LTS "Noble Numbat" - Daily arm64 (20240324)
IwConfig:
lo no wireless extensions.
eth0 no wireless extensions.
Lspci:
Lspci-vt:
Lsusb: Error: command ['lsusb'] failed with exit code 1:
Lsusb-t:
Lsusb-v: Error: command ['lsusb', '-v'] failed with exit code 1:
MachineType: Microsoft Corporation Virtual Machine
Package: linux-meta-hwe-6.11 (not installed)
ProcFB: 0 hyperv_drmdrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-6.8.0-11-generic
root=/dev/mapper/ubuntu--vg-ubuntu--lv ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 6.8.0-11.11-generic 6.8.0-rc4
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No
PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
linux-restricted-modules-6.8.0-11-generic N/A
linux-backports-modules-6.8.0-11-generic N/A
linux-firmware 20240318.git3b128b60-0ubuntu2.13
RfKill:
Tags: noble
Uname: Linux 6.8.0-11-generic aarch64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo users
WifiSyslog:
_MarkForUpload: True
dmi.bios.date: 11/21/2024
dmi.bios.release: 4.1
dmi.bios.vendor: Microsoft Corporation
dmi.bios.version: Hyper-V UEFI Release v4.1
dmi.board.asset.tag: None
dmi.board.name: Virtual Machine
dmi.board.vendor: Microsoft Corporation
dmi.board.version: Hyper-V UEFI Release v4.1
dmi.chassis.asset.tag: 2506-9471-9497-6998-6093-8372-56
dmi.chassis.type: 3
dmi.chassis.vendor: Microsoft Corporation
dmi.chassis.version: Hyper-V UEFI Release v4.1
dmi.modalias:
dmi:bvnMicrosoftCorporation:bvrHyper-VUEFIReleasev4.1:bd11/21/2024:br4.1:svnMicrosoftCorporation:pnVirtualMachine:pvrHyper-VUEFIReleasev4.1:rvnMicrosoftCorporation:rnVirtualMachine:rvrHyper-VUEFIReleasev4.1:cvnMicrosoftCorporation:ct3:cvrHyper-VUEFIReleasev4.1:skuNone:
dmi.product.family: Virtual Machine
dmi.product.name: Virtual Machine
dmi.product.sku: None
dmi.product.version: Hyper-V UEFI Release v4.1
dmi.sys.vendor: Microsoft Corporation
---
ProblemType: Bug
ApportVersion: 2.28.1-0ubuntu3.7
Architecture: arm64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/seq: test 1826 F.... pipewire
CRDA: N/A
CasperMD5CheckResult: pass
CurrentDesktop: MATE
DistroRelease: Ubuntu 24.04
InstallationDate: Installed on 2024-03-24 (456 days ago)
InstallationMedia: Ubuntu 24.04 LTS "Noble Numbat" - Daily arm64 (20240324)
IwConfig:
lo no wireless extensions.
eth0 no wireless extensions.
Lspci:
Lspci-vt:
Lsusb: Error: command ['lsusb'] failed with exit code 1:
Lsusb-t:
Lsusb-v: Error: command ['lsusb', '-v'] failed with exit code 1:
MachineType: Microsoft Corporation Virtual Machine
Package: linux-meta-hwe-6.11 (not installed)
ProcFB: 0 hyperv_fb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-6.8.0-62-generic
root=/dev/mapper/ubuntu--vg-ubuntu--lv ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 6.8.0-62.65-generic 6.8.12
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No
PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
linux-restricted-modules-6.8.0-62-generic N/A
linux-backports-modules-6.8.0-62-generic N/A
linux-firmware 20240318.git3b128b60-0ubuntu2.13
RfKill:
Tags: noble
Uname: Linux 6.8.0-62-generic aarch64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo users
WifiSyslog:
_MarkForUpload: True
dmi.bios.date: 11/21/2024
dmi.bios.release: 4.1
dmi.bios.vendor: Microsoft Corporation
dmi.bios.version: Hyper-V UEFI Release v4.1
dmi.board.asset.tag: None
dmi.board.name: Virtual Machine
dmi.board.vendor: Microsoft Corporation
dmi.board.version: Hyper-V UEFI Release v4.1
dmi.chassis.asset.tag: 2506-9471-9497-6998-6093-8372-56
dmi.chassis.type: 3
dmi.chassis.vendor: Microsoft Corporation
dmi.chassis.version: Hyper-V UEFI Release v4.1
dmi.modalias:
dmi:bvnMicrosoftCorporation:bvrHyper-VUEFIReleasev4.1:bd11/21/2024:br4.1:svnMicrosoftCorporation:pnVirtualMachine:pvrHyper-VUEFIReleasev4.1:rvnMicrosoftCorporation:rnVirtualMachine:rvrHyper-VUEFIReleasev4.1:cvnMicrosoftCorporation:ct3:cvrHyper-VUEFIReleasev4.1:skuNone:
dmi.product.family: Virtual Machine
dmi.product.name: Virtual Machine
dmi.product.sku: None
dmi.product.version: Hyper-V UEFI Release v4.1
dmi.sys.vendor: Microsoft Corporation
---
ProblemType: Bug
ApportVersion: 2.28.1-0ubuntu3.7
Architecture: arm64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/seq: test 1827 F.... pipewire
CRDA: N/A
CasperMD5CheckResult: pass
CurrentDesktop: MATE
DistroRelease: Ubuntu 24.04
InstallationDate: Installed on 2024-03-24 (456 days ago)
InstallationMedia: Ubuntu 24.04 LTS "Noble Numbat" - Daily arm64 (20240324)
IwConfig:
lo no wireless extensions.
eth0 no wireless extensions.
Lspci:
Lspci-vt:
Lsusb: Error: command ['lsusb'] failed with exit code 1:
Lsusb-t:
Lsusb-v: Error: command ['lsusb', '-v'] failed with exit code 1:
MachineType: Microsoft Corporation Virtual Machine
Package: linux-meta-hwe-6.11 (not installed)
ProcFB: 0 hyperv_fb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-6.11.0-26-generic
root=/dev/mapper/ubuntu--vg-ubuntu--lv ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 6.11.0-26.26~24.04.1-generic 6.11.11
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No
PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
linux-restricted-modules-6.11.0-26-generic N/A
linux-backports-modules-6.11.0-26-generic N/A
linux-firmware 20240318.git3b128b60-0ubuntu2.13
RfKill:
Tags: noble
Uname: Linux 6.11.0-26-generic aarch64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo users
WifiSyslog:
_MarkForUpload: True
dmi.bios.date: 11/21/2024
dmi.bios.release: 4.1
dmi.bios.vendor: Microsoft Corporation
dmi.bios.version: Hyper-V UEFI Release v4.1
dmi.board.asset.tag: None
dmi.board.name: Virtual Machine
dmi.board.vendor: Microsoft Corporation
dmi.board.version: Hyper-V UEFI Release v4.1
dmi.chassis.asset.tag: 2506-9471-9497-6998-6093-8372-56
dmi.chassis.type: 3
dmi.chassis.vendor: Microsoft Corporation
dmi.chassis.version: Hyper-V UEFI Release v4.1
dmi.modalias:
dmi:bvnMicrosoftCorporation:bvrHyper-VUEFIReleasev4.1:bd11/21/2024:br4.1:svnMicrosoftCorporation:pnVirtualMachine:pvrHyper-VUEFIReleasev4.1:rvnMicrosoftCorporation:rnVirtualMachine:rvrHyper-VUEFIReleasev4.1:cvnMicrosoftCorporation:ct3:cvrHyper-VUEFIReleasev4.1:skuNone:
dmi.product.family: Virtual Machine
dmi.product.name: Virtual Machine
dmi.product.sku: None
dmi.product.version: Hyper-V UEFI Release v4.1
dmi.sys.vendor: Microsoft Corporation
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