DMAR fault followed by i915 hang
I guess xf86-video-intel is the wrong place to file it re xorg/driver/xf86-video-intel#186 (closed) but I'm now getting regular faults+i915 hangs on 5.4.19:
Mar 10 12:21:45 BMXPSv3 kernel: DMAR: DRHD: handling fault status reg 2
Mar 10 12:21:45 BMXPSv3 kernel: DMAR: [DMA Write] Request device [00:02.0] PASID ffffffff fault addr fffffffec900f000 [fault reason 07] Next page table ptr is invalid
Mar 10 12:21:52 BMXPSv3 kernel: i915 0000:00:02.0: Resetting rcs0 for hang on rcs0
Mar 10 12:22:03 BMXPSv3 kernel: Renderer[4113586]: segfault at 0 ip 00007f69a3b68a1c sp 00007f699e613f90 error 6 in libxul.so[7f69a3a8c000+4afe000]
Mar 10 12:22:03 BMXPSv3 kernel: Code: fe ff 44 88 bc 24 b3 00 00 00 45 31 ff e9 16 13 0e 04 4c 89 f7 e8 a5 14 fe ff e9 60 1c 0e 04 50 48 8b 05 47 3b d5 06 48 89 10 <89> 34 25 00 00 00 00 e8 68 de f2 ff e8 63 de f2 ff e8 5e de f2 ff