Public bug reported:
ThinkPad T480s (Intel UHD 620 + NVIDIA MX150, nouveau, no proprietary driver),
Ubuntu 26.04.
After suspend-to-RAM the internal display stays black. SSH still works, the
system is responsive, but the screen never comes back. Also reproducible after
closing the lid. Occurs under both GNOME/Wayland and Xfce/X11.
Kernel 7.0.0-14-generic (as shipped on the 26.04 ISO): works correctly.
Kernel 7.0.0-28-generic: reproducible failure.
Clean install, no third-party drivers, no custom kernel parameters.
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: linux-image-7.0.0-14-generic 7.0.0-14.14
ProcVersionSignature: Ubuntu 7.0.0-14.14-generic 7.0.0
Uname: Linux 7.0.0-14-generic x86_64
ApportVersion: 2.34.0-0ubuntu2
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: fabian 3856 F.... wireplumber
/dev/snd/seq: fabian 3838 F.... pipewire
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Fri Jul 31 12:49:23 2026
InstallationDate: Installed on 2026-07-31 (0 days ago)
InstallationMedia: Ubuntu 26.04 "Resolute Raccoon" - Release amd64 (20260423.1)
MachineType: LENOVO 20L8S02E00
ProcEnviron:
LANG=de_DE.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-7.0.0-14-generic
root=/dev/mapper/ubuntu--vg-ubuntu--lv ro quiet splash
crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/05/2025
dmi.bios.release: 1.62
dmi.bios.vendor: LENOVO
dmi.bios.version: N22ET85W (1.62 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20L8S02E00
dmi.board.vendor: LENOVO
dmi.board.version: Not Defined
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.ec.firmware.release: 1.23
dmi.modalias:
dmi:bvnLENOVO:bvrN22ET85W(1.62):bd09/05/2025:br1.62:efr1.23:svnLENOVO:pn20L8S02E00:pvrThinkPadT480s:rvnLENOVO:rn20L8S02E00:rvrNotDefined:cvnLENOVO:ct10:cvrNone:skuLENOVO_MT_20L8_BU_Think_FM_ThinkPadT480s:pfaThinkPadT480s:
dmi.product.family: ThinkPad T480s
dmi.product.name: 20L8S02E00
dmi.product.sku: LENOVO_MT_20L8_BU_Think_FM_ThinkPad T480s
dmi.product.version: ThinkPad T480s
dmi.sys.vendor: LENOVO
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: regression-update
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Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/2162560
Title:
T480s: black screen after resume from suspend — regression between
7.0.0-14 and 7.0.0-28
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