** Description changed: Summary Suspend/resume consistently fails to restore the display on a Lenovo ThinkPad P1 Gen 7 with Intel 135H CPU (no dedicated GPU). The system appears to resume successfully (keyboard remains responsive, Caps Lock light toggles), but the internal display remains black. Sometimes connecting an external monitor immediately restores both displays (laptop screen and external monitor). Other times neither the internal nor external display comes back and a hard reboot is required. Hardware - Lenovo ThinkPad P1 Gen 7 + Lenovo ThinkPad P1 Gen 7 - Intel Core Ultra 5 135H + Intel Core Ultra 5 135H - Intel Arc integrated graphics only (no NVIDIA GPU) + Intel Arc integrated graphics only (no NVIDIA GPU) - BIOS N48ET34W (1.21) + BIOS N48ET34W (1.21) Software - Ubuntu 26.04, installed from official Ubuntu ISO on July 25th 2026. + Ubuntu 26.04, installed from official Ubuntu ISO on July 25th 2026. - Kernel 7.0.0-28-generic + Kernel 7.0.0-28-generic - GNOME on Wayland + GNOME on Wayland - Suspend mode: s2idle + Suspend mode: s2idle - Graphics driver: i915 (xe driver available, but i915 seems to be the + Graphics driver: i915 (xe driver available, but i915 seems to be the default) Steps to reproduce - Boot normally. + Boot normally. - Suspend the system. + Suspend the system. - Resume the system. + Resume the system. - Note, does NOT occur on every suspend/resume cycle, only sometimes. + Note, does NOT occur on every suspend/resume cycle, only sometimes. It seems to happen more consistently when the computer has been suspended for a long time. Quick suspend/resume cycles in rapid succession are usually successful (but not always). Expected result The display should restore normally. Actual result The system resumes but the display remains black. Caps Lock continues to function, and well as other keyboard lights, indicating the system is still running. Sometimes attaching an external monitor restores the display. Other times it does not. One time it brought itself back on after a few minutes, but I have not been able to reproduce that in a while. Relevant kernel messages After resume the kernel reports Intel i915 display failures including: - Failed to bring PHY A to idle + Failed to bring PHY A to idle - Timeout waiting for DDI BUF A + Timeout waiting for DDI BUF A - flip_done timed out + flip_done timed out - DPLL hardware state mismatch + DPLL hardware state mismatch These occur immediately after resume. + + Other bugs that seems similar or related: + + Red Hat Bugzilla #2463170 (Fedora 44, kernel 7.0.x) + https://bugzilla.redhat.com/show_bug.cgi?id=2463170&utm_source=chatgpt.com + ThinkPad P1 Gen 7 + Intel integrated graphics + Suspend/resume failures + Exact same errors: + Failed to bring PHY A to idle + Timeout waiting for DDI BUF A to get active + Timed out waiting for DP idle patterns + flip_done timed out + + Arch Linux forum thread (May 2026) + https://bbs.archlinux.org/viewtopic.php?id=313680&utm_source=chatgpt.com + Users on 7.0 kernels report: + Failed to bring PHY A to idle + Pageflip timed out! This is a bug in the i915 kernel driver + flip_done timed out + + Ubuntu Community (Discourse) + https://discourse.ubuntu.com/t/laptop-screen-having-trouble-turning-on-after-sleep-being-off/81112?utm_source=chatgpt.com + Another ThinkPad P1 Gen 7 owner (replying in the comments) reports black-screen-after-sleep behavior on Ubuntu 26.04. Their hardware includes a discrete NVIDIA GPU, but they're using Wayland with Mesa, and the symptom (internal display failing after suspend) is similar. ProblemType: Bug DistroRelease: Ubuntu 26.04 Package: linux-image-7.0.0-28-generic 7.0.0-28.28 ProcVersionSignature: Ubuntu 7.0.0-28.28-generic 7.0.12 Uname: Linux 7.0.0-28-generic x86_64 ApportVersion: 2.34.1-0ubuntu0.1 Architecture: amd64 AudioDevicesInUse: - USER PID ACCESS COMMAND - /dev/snd/controlC0: jeff 4502 F.... pipewire - jeff 4522 F.... wireplumber - /dev/snd/seq: jeff 4502 F.... pipewire + USER PID ACCESS COMMAND + /dev/snd/controlC0: jeff 4502 F.... pipewire + jeff 4522 F.... wireplumber + /dev/snd/seq: jeff 4502 F.... pipewire CasperMD5CheckResult: pass CurrentDesktop: ubuntu:GNOME Date: Mon Jul 27 21:21:31 2026 InstallationDate: Installed on 2026-07-23 (4 days ago) InstallationMedia: Ubuntu 26.04 "Resolute Raccoon" - Release amd64 (20260423.1) MachineType: LENOVO 21KVCTO1WW ProcEnviron: - LANG=en_US.UTF-8 - PATH=(custom, no user) - SHELL=/bin/bash - TERM=xterm-256color - XDG_RUNTIME_DIR=<set> + LANG=en_US.UTF-8 + PATH=(custom, no user) + SHELL=/bin/bash + TERM=xterm-256color + XDG_RUNTIME_DIR=<set> ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-7.0.0-28-generic root=UUID=c5c9f1a7-f9a8-4681-8d58-4dbe3736da6e 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: 05/11/2026 dmi.bios.release: 1.21 dmi.bios.vendor: LENOVO dmi.bios.version: N48ET34W (1.21 ) dmi.board.asset.tag: Not Available dmi.board.name: 21KVCTO1WW dmi.board.vendor: LENOVO dmi.board.version: SDK0T76530 WIN dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.ec.firmware.release: 1.15 dmi.modalias: dmi:bvnLENOVO:bvrN48ET34W(1.21):bd05/11/2026:br1.21:efr1.15:svnLENOVO:pn21KVCTO1WW:pvrThinkPadP1Gen7:rvnLENOVO:rn21KVCTO1WW:rvrSDK0T76530WIN:cvnLENOVO:ct10:cvrNone:skuLENOVO_MT_21KV_BU_Think_FM_ThinkPadP1Gen7:pfaThinkPadP1Gen7: dmi.product.family: ThinkPad P1 Gen 7 dmi.product.name: 21KVCTO1WW dmi.product.sku: LENOVO_MT_21KV_BU_Think_FM_ThinkPad P1 Gen 7 dmi.product.version: ThinkPad P1 Gen 7 dmi.sys.vendor: LENOVO
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2161937 Title: ThinkPad P1 Gen 7 (Intel Meteor Lake) black screen after suspend (s2idle) on Ubuntu 26.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2161937/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
