Comment # 5 on bug 982991 from Takashi Iwai

(In reply to Olaf Hering from comment #4)
> (In reply to Olaf Hering from comment #1)
> > Created attachment 679526 [details]
> > bug982991.tar.xz
> > 
> > With modified udev rule to run biosdevname via strace. Not sure where em1 is
> > actually coming from.
> 
> In dom0 the included dmidecode can not read from /dev/mem, and as a result
> there is no info about onboard devices. Since this worked with xenlinux
> based kernels its a regression.
> Its also reported as bug#974257

Ah, I see.  Then this is due to your patch
patches.suse/xen-pv-devmem_is_allowed.patch, isn't it?

Don't you have a kernel message indicating the invalid /dev/mem access?