OK. This is now a kernel bug. ** No longer affects: gnome-shell (Ubuntu)
** Summary changed: - Short freezes in Wayland session + System keeps briefly freezing with kernel errors "snd_hda_intel 0000:01:00.1: Disabling via vga_switcheroo" and "snd_hda_intel 0000:01:00.1: Cannot lock devices!" -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1775126 Title: System keeps briefly freezing with kernel errors "snd_hda_intel 0000:01:00.1: Disabling via vga_switcheroo" and "snd_hda_intel 0000:01:00.1: Cannot lock devices!" Status in linux package in Ubuntu: Incomplete Status in linux package in Fedora: Unknown Bug description: When using Wayland, I observe sub-second freezes a couple of times per minute. It just freezes the mouse and everything for a split second, and continues as if nothing happened. When using Xorg, everything runs smoothly. (hence I did not pick Xorg in ubuntu-bug) I suspect this is a GPU issue. My laptop has a hybrid GPU, and dmesg is filled with vga_switcheroo messages [ 2640.943598] snd_hda_intel 0000:01:00.1: Disabling via vga_switcheroo [ 2641.243870] snd_hda_intel 0000:01:00.1: Cannot lock devices! [ 2641.260536] ACPI: \_SB_.PCI0.PEG0.VID_: failed to evaluate _DSM [ 2658.996392] snd_hda_intel 0000:01:00.1: Enabling via vga_switcheroo I tried to manually switch to the dedicated graphics card, and that completely froze my session. Now I can't even log in using Wayland anymore, as it straight up crashes and goes back to the login screen. Xorg is still fine... Now there are other weird messages such as [ 2777.002437] nouveau 0000:01:00.0: gr: DATA_ERROR 0000009c [] ch 8 [001f998000 systemd-logind[855]] subc 0 class 9297 mthd 0d78 data 00000004 [ 2889.648718] snd_hda_codec_hdmi hdaudioC1D0: out of range cmd 0:5:707:ffffffff And I suppose these are from the crash that I caused myself (not sure if related to the short freezes) [ 2551.513519] gnome-shell[5179]: segfault at 128 ip 00007f409effeab0 sp 00007ffcf4af1148 error 4 in libmutter-clutter-2.so[7f409efba000+161000] [ 2570.239129] Chrome_~dThread[6018]: segfault at 0 ip 00007ff90a3494cd sp 00007ff9086c9b00 error 6 in libxul.so[7ff90958f000+6111000] [ 2628.443468] gnome-shell[6348]: segfault at 0 ip 00007f6349eb6c90 sp 00007ffe5acd8bc8 error 4 in libgbm.so.1.0.0[7f6349eb4000+c000] [ 2777.424194] gnome-shell[6913]: segfault at 0 ip 00007ff1e8550c90 sp 00007ffe6cddb228 error 4 in libgbm.so.1.0.0[7ff1e854e000+c000] ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: gnome-shell 3.28.1-0ubuntu2 ProcVersionSignature: Ubuntu 4.15.0-22.24-generic 4.15.17 Uname: Linux 4.15.0-22-generic x86_64 ApportVersion: 2.20.9-0ubuntu7.1 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Tue Jun 5 08:14:17 2018 DisplayManager: gdm3 GsettingsChanges: b'org.gnome.shell' b'command-history' redacted by apport b'org.gnome.shell' b'app-picker-view' b'uint32 1' b'org.gnome.shell' b'favorite-apps' redacted by apport b'org.gnome.desktop.interface' b'gtk-im-module' b"'gtk-im-context-simple'" InstallationDate: Installed on 2018-04-27 (38 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) SourcePackage: gnome-shell UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1775126/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
