I got somewhat further.
Kernel tells
xe 0000:00:02.0: Your graphics device 46d1 is not officially supported
by xe driver in this kernel version. To force Xe probe,
use xe.force_probe='46d1' and i915.force_probe='!46d1'
module parameters or CONFIG_DRM_XE_FORCE_PROBE='46d1' and
CONFIG_DRM_I915_FORCE_PROBE='!46d1' configuration options.
Graphics Device is a
00:02.0 VGA compatible controller [0300]: Intel Corporation Alder Lake-N
[UHD Graphics] [8086:46d1] (prog-if 00 [VGA controller])
but applying the mentioned kernel options doesn't make it work either. Forcing
xe to recognize it gives
[ 23.334451] xe 0000:00:02.0: [drm] Found alderlake_p/alderlake_n (device ID
46d1) integrated display version 13.00 stepping D0
[ 23.335224] xe 0000:00:02.0: vgaarb: VGA decodes changed:
olddecodes=io+mem,decodes=none:owns=io+mem
[ 23.340515] xe 0000:00:02.0: [drm] Finished loading DMC firmware
i915/adlp_dmc.bin (v2.20)
[ 23.344679] xe 0000:00:02.0: [drm] GT0: Using GuC firmware from
i915/tgl_guc_70.bin version 70.44.1
but screen remains black.
The problem seems to be that the Intel Alder Lake hardware is simply not
supported by both the old i915 and the new xe display drivers.
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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/2127674
Title:
Screen resolution limited to 800x600 after update to 25.10
Status in linux package in Ubuntu:
New
Bug description:
Hi,
I have a small 10 inch Notebook with a resolution of 1200x1920
(actually, for some unknown reason, they used a portrait mode LCD and
rotated it 90 degree to get the usual notebook landscape display,
therefore the screen needs to be set to "rotated" in Desktops)
It worked in full resolution under Kubuntu 25.04.
After updating to Kubuntu 25.10 (do-release-update -d) the screen
resolution is fixed to 800x600, and can't be changed in the kde
settings.
Seems as if the driver is gone and notebook now runs in standard VGA
mode.
btw., I do need kernel option nomodeset, otherwise screen remains
black after booting (both in 25.04 and 25.10)
regards
ProblemType: Bug
DistroRelease: Ubuntu 25.10
Package: kwin-wayland 4:6.4.5-0ubuntu3
ProcVersionSignature: Ubuntu 6.17.0-5.5-generic 6.17.0-rc7
Uname: Linux 6.17.0-5-generic x86_64
ApportVersion: 2.33.1-0ubuntu3
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: KDE
Date: Sat Oct 11 00:42:58 2025
InstallationDate: Installed on 2025-04-24 (169 days ago)
InstallationMedia: Kubuntu 25.04 "Plucky Puffin" - Release amd64 (20250417)
SourcePackage: kwin
UpgradeStatus: Upgraded to questing on 2025-10-10 (0 days ago)
---
ProblemType: Bug
ApportVersion: 2.33.1-0ubuntu3
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: hadmut 2308 F.... wireplumber
/dev/snd/seq: hadmut 2298 F.... pipewire
CasperMD5CheckResult: unknown
CurrentDesktop: KDE
DistroRelease: Ubuntu 25.10
InstallationDate: Installed on 2025-04-24 (169 days ago)
InstallationMedia: Kubuntu 25.04 "Plucky Puffin" - Release amd64 (20250417)
IwDevWlp1s0Link: Not connected.
MachineType: Default string Default string
Package: linux (not installed)
ProcFB: 0 simpledrmdrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-6.17.0-5-generic
root=UUID=8c842261-0600-4c62-9f12-684d075d5ec0 ro mem_sleep_default=s2idle
nomodeset quiet rd.luks.uuid=b5fa7f1b-077e-4f53-bf82-23a653ce4571 nosplash
nomodeset fbcon=rotate:1 video=None-1:panel_orientation=right_side_up
intel_idle.max_cstate=2
ProcVersionSignature: Ubuntu 6.17.0-5.5-generic 6.17.0-rc7
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No
PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
firmware-sof N/A
linux-firmware 20250901.git993ff19b-0ubuntu1
Tags: questing
Uname: Linux 6.17.0-5-generic x86_64
UnreportableReason: In diesem Bericht geht es um ein Paket, welches nicht
installiert ist.
UpgradeStatus: Upgraded to questing on 2025-10-10 (0 days ago)
UserGroups: N/A
_MarkForUpload: False
dmi.bios.date: 11/26/2024
dmi.bios.release: 5.25
dmi.bios.vendor: American Megatrends International, LLC.
dmi.bios.version: NYM.N133REV30.013
dmi.board.asset.tag: Default string
dmi.board.name: Default string
dmi.board.vendor: Default string
dmi.board.version: Default string
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 10
dmi.chassis.vendor: Default string
dmi.chassis.version: Default string
dmi.ec.firmware.release: 1.1
dmi.modalias:
dmi:bvnAmericanMegatrendsInternational,LLC.:bvrNYM.N133REV30.013:bd11/26/2024:br5.25:efr1.1:svnDefaultstring:pnDefaultstring:pvrDefaultstring:rvnDefaultstring:rnDefaultstring:rvrDefaultstring:cvnDefaultstring:ct10:cvrDefaultstring:skuDefaultstring:
dmi.product.family: Default string
dmi.product.name: Default string
dmi.product.sku: Default string
dmi.product.version: Default string
dmi.sys.vendor: Default string
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