Public bug reported:
The built-in screen of my DELL Latitude 5300 2in1 turned black when
booting linux (Kubuntu 26.04 LTS) on kernel 7.0.0-28-generic. The
external hdmi outputs were completely fine. After changing kernel to
7.0.0-27-generic everything came back to normal.
Ubuntu 7.0.0-27.27-generic 7.0.6 works for me now.
Operating System: Kubuntu 26.04 LTS
KDE Plasma Version: 6.6.5
KDE Frameworks Version: 6.24.0
Qt Version: 6.10.2
Kernel Version: 7.0.0-27-generic (64-bit)
Graphics Platform: Wayland
Processors: 8 × Intel® Core™ i7-8665U CPU @ 1.90GHz
Memory: 16 GiB of RAM (15,4 GiB usable)
Graphics Processor: Intel® UHD Graphics 620
Manufacturer: Dell Inc.
Product Name: Latitude 5300 2-in-1
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: linux-image-7.0.0-28-generic 7.0.0-28.28
ProcVersionSignature: Ubuntu 7.0.0-27.27-generic 7.0.6
Uname: Linux 7.0.0-27-generic x86_64
ApportVersion: 2.34.1-0ubuntu0.1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: bartek 1879 F.... wireplumber
/dev/snd/seq: bartek 1875 F.... pipewire
CasperMD5CheckResult: unknown
CurrentDesktop: KDE
Date: Tue Jul 28 09:03:19 2026
InstallationDate: Installed on 2026-07-13 (14 days ago)
InstallationMedia: Kubuntu 26.04 "Resolute Raccoon" - Release amd64 (20260423)
MachineType: Dell Inc. Latitude 5300 2-in-1
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-7.0.0-27-generic
root=UUID=ee10401b-5de5-4d31-9f2a-f8d149e2d8f4 ro quiet splash
video.use_native_backlight=1
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No
PulseAudio daemon running, or not running as session daemon.
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/05/2025
dmi.bios.release: 1.37
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.37.0
dmi.board.name: 0J9C2F
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 31
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvr1.37.0:bd08/05/2025:br1.37:svnDellInc.:pnLatitude53002-in-1:pvr:rvnDellInc.:rn0J9C2F:rvrA00:cvnDellInc.:ct31:cvr:sku08B6:pfaLatitude:
dmi.product.family: Latitude
dmi.product.name: Latitude 5300 2-in-1
dmi.product.sku: 08B6
dmi.sys.vendor: Dell Inc.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug resolute wayland-session
** Attachment added: "lspci-vnvn.log"
https://bugs.launchpad.net/bugs/2161949/+attachment/5987305/+files/lspci-vnvn.log
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https://bugs.launchpad.net/bugs/2161949
Title:
Backlight bug on kernel change
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