Public bug reported:
## What's wrong
The OS starts in software rendering mode. The only thing I've changed
(and found in the logs) is installing the updates for sudo-rs and intel
microcode via the Ubuntu Software Updater (which I don't suspect to be
an issue, I hope, as I don't use an Intel CPU).
I've been using the kernel-provided mesa drivers.
Boot logs also include "not hardware accelerated" pops up.
## What I've tried
- Reverting back to 6.14.0-35 makes the GPU work correctly again.
- I've looked through update logs (apt, dpkg, unattended-upgrades) to verify
what changed between the GPU working and not working
- In the past, I've been using amdgpu drivers from the AMD website, but these
no longer install due to issues with DKMS compilation under 6.17-0.6. I've
tried to install these again, to no avail. I've purged these since.
## My assumptions
- I don't suspect my local packages, as things just work under Kernel
6.14, but I'm very happy to provide more info if that still may be the
case
## Additional info
1. `vulkaninfo --summary` output
```bash
Devices:
========
GPU0:
apiVersion = 1.4.318
driverVersion = 25.2.3
vendorID = 0x10005
deviceID = 0x0000
deviceType = PHYSICAL_DEVICE_TYPE_CPU
deviceName = llvmpipe (LLVM 20.1.8, 256 bits)
driverID = DRIVER_ID_MESA_LLVMPIPE
driverName = llvmpipe
driverInfo = Mesa 25.2.3-1ubuntu1 (LLVM 20.1.8)
conformanceVersion = 1.3.1.1
deviceUUID = 6d657361-3235-2e32-2e33-2d3175627500
driverUUID = 6c6c766d-7069-7065-5555-494400000000
```
2. `lshw -c video` output
```bash
*-display
description: VGA compatible controller
product: Navi 48 [Radeon RX 9070/9070 XT/9070 GRE]
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 0
bus info: pci@0000:0b:00.0
logical name: /dev/fb0
version: c0
width: 64 bits
clock: 33MHz
capabilities: pm pciexpress msi vga_controller bus_master cap_list fb
configuration: depth=32 latency=0 resolution=1024,768
resources: iomemory:780-77f iomemory:7c0-7bf
memory:7800000000-7bffffffff memory:7c00000000-7c0fffffff ioport:e000(size=256)
memory:fcd00000-fcd7ffff memory:fcd80000-fcd9ffff
```
3. Kern.log after boot
```bash
./syslog-2025-11-11T21:48:50.613665+01:00 janitors-closet gnome-shell[2599]:
Added device '/dev/dri/card0' (simpledrm) using a
tomic mode setting.
./syslog:2025-11-11T21:48:50.615750+01:00 janitors-closet gnome-shell[2599]:
Failed to initialize accelerated iGPU/dGPU framebuffer sharing: Not hardware
accelerated
./syslog-2025-11-11T21:48:50.615811+01:00 janitors-closet gnome-shell[2599]:
Created gbm renderer for '/dev/dri/card0'
./syslog-2025-11-11T21:48:50.615853+01:00 janitors-closet gnome-shell[2599]:
Integrated GPU /dev/dri/card0 selected as primary
```
4. `lsb_release` output
```bash
$ lsb_release -rd
Description: Ubuntu 25.10
Release: 25.10
```
## Expected outcome
Anything I can do here to debug this more? I'd like to continue using
the newer Kernel.
Huge thanks in advance!
ProblemType: Bug
DistroRelease: Ubuntu 25.10
Package: xorg (not installed)
ProcVersionSignature: Ubuntu 6.17.0-6.6-generic 6.17.1
Uname: Linux 6.17.0-6-generic x86_64
ApportVersion: 2.33.1-0ubuntu3
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Thu Nov 13 01:52:29 2025
InstallationDate: Installed on 2023-07-31 (835 days ago)
InstallationMedia: Ubuntu 22.04.2 LTS "Jammy Jellyfish" - Release amd64
(20230223)
SourcePackage: xorg
Symptom: display
UpgradeStatus: Upgraded to questing on 2025-11-04 (9 days ago)
** Affects: ubuntu
Importance: Undecided
Status: New
** Tags: amd64 apport-bug questing resolution wayland-session
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https://bugs.launchpad.net/bugs/2131185
Title:
Ubuntu 25.10 (Gnome, Kernel 6.17.0-6) - OS started forcing software
rendering mode on 9070XT
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