Created attachment 145439 [details]
Additional log of divide error

(In reply to Matthias Müller from comment #52)
> Comment on attachment 145436 [details]
> Log of divide error
> 
> i just encountered a "random" freeze, too.
> And because it seems to be something "new", i thought i'd post it here -
> seems to be some kind of null pointer from what i found?

I've also been getting this, albeit very rarely. It doesn't seem to happen with
older firmware (ie. Jul 14th firmware extracted from Fedora's linux-firmware
package), only the newer firmware from the ~agd5f/radeon_ucode repo causes
this.

I figured maybe it had to do with PCIe bandwidth, but it occurs on 3.0 as well
as 4.0. Even occurs with system-wide AMD_DEBUG=nodma in my /etc/environment.
There is no amdgpu error in journalctl, just the above. Screen freezes & I have
to reboot with REISUB.

Perhaps this is a different issue, and if so, perhaps we should make a separate
bug report for it?