System spontaneously reboots

[edwintorok]

I understand that AMD based systems may not be supported by Qubes as well as Intel systems, but I thought to report this nonetheless, just in case its a bug that would affect something else too.

IIRC this was the 2nd boot after install (see #1680), I started/stopped a few VMs (for example I stopped the whonix VM and the sys-whonix one), tried to run qubes-dom0update but it failed due to a missing repomd.xml file, updated some template VMs.
Then I started a VM from the menu (note that Qubes VM manager was already not working at this point, see #1680), I got the notification that the VM is booting and then the machine just rebooted by itself.

No error messages, no high CPU usage (fan wasn't audible), no panic messages, it just rebooted.
The system has 12 GiB of RAM so its unlikely it would've run out of memory so soon.

I tried to recreate the situations by booting/stopping some VMs, but I couldn't.
The /var/log/messages from the 2nd boot are here, are there any other logs that could contain hints on why it rebooted?

Is there some setting in Xen or Qubes to tell it to show a panic message instead of rebooting?

BTW I've been running 4.1, 4.2 and 4.3 kernels from Debian jessie+backports with sysvinit and KVM without problems for years on this machine, although I haven't tried running Xen with IOMMU for an extended period of time, so this might be a Xen problem, but then it might also be a dom0 issue (or even a systemd issue).
If dom0 crashes would it be expected to have the system spontaneously reboot?

Here is some system information and hypervisor logs that I collected now (obviously not before the reboot bug): https://gist.github.com/edwintorok/64e6473c0fa1191a1bc2

[edwintorok]

Reproduced. This is related to KDE/OpenGL: #1680 (comment), so closing this bug in favour of the other one.

[edwintorok]

Reproduced. This is related to KDE/OpenGL: #1680 (comment), so closing this bug in favour of the other one.