This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:
apport-collect 1775126 and then change the status of the bug to 'Confirmed'. If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'. This change has been made by an automated script, maintained by the Ubuntu Kernel Team. ** Changed in: linux (Ubuntu) Status: New => Incomplete -- 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