Discussion over at Arch led me to try adding the kernel parameter intel_iommu=on. https://bbs.archlinux.org/viewtopic.php?id=256520
That appears to have solved the problem (I hope I'm not speaking too soon), but now (as discussed in another Arch forum post) there's a new one: https://bbs.archlinux.org/viewtopic.php?id=228604 I also understand this causes power use to go up. $ dmesg -T | grep -i i915 [Mon Apr 19 23:57:41 2021] i915 0000:00:02.0: [drm] VT-d active for gfx access [Mon Apr 19 23:57:41 2021] i915 0000:00:02.0: vgaarb: deactivate vga console [Mon Apr 19 23:57:41 2021] i915 0000:00:02.0: [drm] DMAR active, disabling use of stolen memory [Mon Apr 19 23:57:41 2021] i915 0000:00:02.0: vgaarb: changed VGA decodes: olddecodes=io+mem,decodes=io+mem:owns=io+mem [Mon Apr 19 23:57:41 2021] [drm] Initialized i915 1.6.0 20200515 for 0000:00:02.0 on minor 0 [Mon Apr 19 23:57:41 2021] fbcon: i915drmfb (fb0) is primary device [Mon Apr 19 23:57:42 2021] i915 0000:00:02.0: [drm] *ERROR* uncleared fifo underrun on pipe A [Mon Apr 19 23:57:42 2021] i915 0000:00:02.0: [drm] *ERROR* CPU pipe A FIFO underrun [Mon Apr 19 23:57:42 2021] i915 0000:00:02.0: [drm] *ERROR* uncleared pch fifo underrun on pch transcoder A [Mon Apr 19 23:57:42 2021] i915 0000:00:02.0: [drm] *ERROR* PCH transcoder A FIFO underrun [Mon Apr 19 23:57:42 2021] i915 0000:00:02.0: fb0: i915drmfb frame buffer device [Mon Apr 19 23:59:47 2021] snd_hda_intel 0000:00:1b.0: bound 0000:00:02.0 (ops i915_audio_component_bind_ops [i915]) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1925126 Title: Intel video driver i915 - Repeated GPU HANG's, jitter, freeze-ups 5.8.0-50 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1925126/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
