I'm running QEMU 3.1 on Ubuntu (kernel 5.0.0-15-lowlatency) and receive the following error when starting a VM with a passed through video card:
Jun 2 17:43:17 livingroom kernel: [ 138.519329] BUG: unable to handle kernel NULL pointer dereference at 0000000000000501 Jun 2 17:43:17 livingroom kernel: [ 138.519332] #PF error: [normal kernel read fault] Jun 2 17:43:17 livingroom kernel: [ 138.519333] PGD 0 P4D 0 Jun 2 17:43:17 livingroom kernel: [ 138.519335] Oops: 0000 [#1] PREEMPT SMP NOPTI Jun 2 17:43:17 livingroom kernel: [ 138.519336] CPU: 11 PID: 1499 Comm: kworker/11:3 Tainted: P OE 5.0.0-15-lowlatency #16-Ubuntu Full dmesg trace: https://pastebin.com/ZaeqtKM2 The card I am passing through is an MSI Nvidia 2080 Ventus on a Gigabyte Z390 Aorus Ultra. There is a similar report [1], but the issue was related to USB, and mine seems related to snd_hda_codec_hdmi. Any suggestions on how to correct this behavior? Thanks, Brett [1] https://www.redhat.com/archives/vfio-users/2018-February/msg00030.html
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