Tested a 104min suspend on mainline kernel 7.2 https://kernel.ubuntu.com/mainline/v7.2/ and it resumed without issue. No other changes. -- You received this bug notification because you are subscribed to linux in Ubuntu. Matching subscriptions: Bgg, Bmail, Nb https://bugs.launchpad.net/bugs/2161937 Title: ThinkPad P1 Gen 7 (Intel Meteor Lake) black screen after suspend (s2idle) on Ubuntu 26.04 Status in linux package in Ubuntu: Confirmed Bug description: 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. Some extended testing seems to suggest that the system successfully resumes as long as you bring it back before the Automatic Suspend Delay kicks in. I can manually suspend it and bring it right back up without issue. I can close the lid which suspends it and bring it right back up without issue. If I leave the computer open and allow the Automatic Suspend Delay (15 min on my machine) to be reached, then it will not come back up. This is the issue being described in this bug report. I have not tried manually suspending and then waiting 15+ min to bring back up yet, but will try soon. *UPDATE: manual suspending and then waiting a long time also has the same issue. It seems to be time related, and not directly related to what triggered the suspend. Plugged in vs unplugged does not appear to make a difference, but more in depth testing may be required. Hardware Lenovo ThinkPad P1 Gen 7 Intel Core Ultra 5 135H Intel Arc integrated graphics only (no NVIDIA GPU) BIOS N48ET34W (1.21) Software Ubuntu 26.04, installed from official Ubuntu ISO on July 25th 2026. Kernel 7.0.0-28-generic **UPDATE: still broken on 7.0.0-29-generic & 7.0.0-30-generic GNOME on Wayland Suspend mode: s2idle Graphics driver: i915 (xe driver available, but i915 seems to be the default) Steps to reproduce Boot normally. Suspend the system. Resume the system. 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). This is covered in the summary section above. 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 Timeout waiting for DDI BUF A flip_done timed out 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. Gitlab https://gitlab.freedesktop.org/drm/i915/kernel/-/work_items/16098 . . . 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 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> 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 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2161937/+subscriptions
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