I can confirm this crash on different hardware with the same trigger pattern.
Environment: - Lenovo ThinkPad T14 Gen 5 (21ML00ERGE), Core Ultra 5 135U, Intel Arc iGPU (i915, device ID 7d45) - Ubuntu 26.04, Wayland session, native backend, atomic mode setting - libmutter-18-0 50.1-0ubuntu2.2, gnome-shell 50.1 - Linux 7.0.0-30-generic Sequence of events: laptop woke from suspend (lid opened) around 18:21. I toggled the hardware privacy screen (ThinkPad Privacy Guard, privacy_screen-thinkpad_acpi provider) approximately one hour before the crash. The screen later blanked due to idle timeout, and the crash occurred when I tried to wake the display by moving the cursor. Backtrace retraced with libmutter-18-0-dbgsym 50.1-0ubuntu2.2, identical crash location to the original report: #6 meta_kms_impl_get_kms (impl=<error reading variable: Cannot access memory at address 0x5760709e847e>) at ../src/backends/native/meta-kms-impl.c:52 #7 meta_kms_impl_device_get_fd (impl_device=0x5760709e8526) at ../src/backends/native/meta-kms-impl-device.c:1235 #8 meta_kms_mode_create_blob_id (mode=0x7e772c036a40, error=0x7e77449fe118) at ../src/backends/native/meta-kms-mode.c:51 #9 process_mode_set (...) at ../src/backends/native/meta-kms-impl-device-atomic.c:409 #10 process_entries (...) at ../src/backends/native/meta-kms-impl-device-atomic.c:978 #11 meta_kms_impl_device_atomic_process_update (impl_device=0x7e772c005870, ...) at ../src/backends/native/meta-kms-impl-device-atomic.c:1204 #12 do_process (impl_device=0x7e772c005870, ..., flags=META_KMS_UPDATE_FLAG_MODE_SET) at ../src/backends/native/meta-kms-impl-device.c:1649 Attaching journalctl output from both crash boots (Sept 6 crash window 18:00-19:15, and a similar earlier crash on Sept 4 in window 17:00-17:22). Identifying details (hostname, MAC/IP addresses, disk/network-connection UUIDs, NextDNS account ID) have been redacted; the laptop model is left in as it's directly relevant to the privacy- screen trigger. ** Attachment added: "journalctl - both crash sessions (redacted)" https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/2165888/+attachment/5997996/+files/launchpad_attachment_redacted.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2165888 Title: gnome-shell 50.1 SIGSEGV in KMS thread during mode set on display wake after privacy screen toggle (regression of bug 2085420) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/2165888/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
