On Wed, 27 May 2020 21:31:46 +0200 Salvatore Bonaccorso
<car...@debian.org> wrote:
Source: linux
Version: 5.6.7-1
Control: submitter -1 deb...@the-jedi.co.uk
Forwarding this report as bug in the BTS.
On Mon, May 25, 2020 at 09:03:43PM +0100, Simon John wrote:
> Sorry to email directly but I've tried reportbug but it doesn't seem to work
> with the kernel packages.
What exactly did not work?
I tried to report a bug in 5.5 kernel regarding HDMI audio not working
after a while until you kill pulseaudio but reportbug did not create a
valid report i guess as it never got created - i tried using the email
template too.
same problem when trying to report this bug.
Anyway, at least this bug has been created now, hopefully will get
looked into.
> The 5.6.0-1 kernel in Sid when used in conjunction with VFIO (PCI
> passthrough) guests in Qemu-KVM causes KVM to crash with no useful logs -
> the guest partially starts. Eventually the host slows down and needs to be
> powered off. Doesn't affect non-VFIO guests using spice/headless, only when
> passing through a PCIe graphics card or USB keyboard/mouse.
>
> 5.6.0-2 that just landed makes this infinitely worse - as soon as you start
> a VFIO guest the host hard crashes.
>
> 5.3/5.4/5.5 kernels do not have this problem with the same version of Qemu
> and reverting from qemu 5.0 to 4.2 doesn't help, so it must be the 5.6
> kernel causing the issue.
>
> Not sure what logs or any useful information I can supply you, there's some
> interesting comments on this reddit thread suggesting a couple of bugs that
> have fixes upstream:
>
> https://www.reddit.com/r/VFIO/comments/glfgqs/qemu_5_vfio_no_longer_works_on_debian/
>
> I'm using macos catalina and win10 guests to reproduce the issue, and using
> Intel not AMD chips.
>
> Cheers.
>
> --
> Simon John
Regards,
Salvatore
Best regards.
--
Simon John
