Re: Xorg crashes in KVM

On 11/07/2021 18:17, Eyal Lebedinsky wrote: > > > On 11/07/2021 20.14, Ed Greshko wrote: >> On 11/07/2021 16:19, Eyal Lebedinsky wrote: >>> >>> >>> On 11/07/2021 10.22, Ed Greshko wrote: >>>> On 10/07/2021 19:09, Eyal Lebedinsky wrote: >>>>> >>>>> On 10/07/2021 10.56, Ed Greshko wrote: >>>>>> On 10/07/2021 08:44, Eyal Lebedinsky wrote: >>>>>>> Recently I started having Xorg crash while using firefox. >>>>>>> This is f34 in a libvirt kvm, host (also f34) uses internal i915 video. >>>>>>> Kernel is 5.12.14-300.fc34.x86_64 but saw this with earlier 5.12.12/13 kernels. >>>>>> >>>>>> I've not seen any crashes on my VM.  Host is F34 and multiple guests, including F34 guests. >>>>>> >>>>>> As a test, have you tried changing your guest video from QXL to Virtio? >>>>> >>>>> Worth a try. I am now running with Virtio video. Audio sync is a bit out... >>>>> >>>>> Interestingly: I tried to change back to QXL for comparo but LXD could not start, >>>>> X repeatedly terminated with >>>>>     [    43.747] resizing primary to 3840x2160 >>>>>     [    43.747] primary is 0x5640e09faa30 >>>>>     [    43.747] (EE) qxl(0): failed to set mode: Cannot allocate memory(EE) >>>>> I will deal with this later. >>>>> >>>> >>>> Is your host running low on memory? >>> >>> I do not think so. I changed back to QXL and LXDM failed in a loop, at that point >>> I did this on the host: >>> >>> $ free >>>                total        used        free      shared buff/cache   available >>> Mem:        32734592     3232096     7343812      246400 22158684    28782264 >>> Swap:       16777212     1064704    15712508 >>> >>> The guest is configured with 8GB memory. >>> >>> [later] I had a very vague memory that I needed to fiddle with the domain xml file. >>> I restored /etc/libvirt/qemu/e4.xml from backup and compared and sure it was different. >>> >>> I used >>>     $ sudo virsh edit e4 >>> and set the <video> stanza to say >>>     <model type='qxl' ram='131072' vram='131072' vgamem='32768' heads='1' primary='yes'/> >>> where it originally said >>>     <model type='qxl' ram='65536' vram='65536' vgamem='16384' heads='1' primary='yes'/> >>> Now lxdm starts OK. >>> >>> Audio sync still bad. Video barely keeps up. Probably similar to virtio mode. >>> >>> I will run this way until I get an Xorg crash, then switch to virtio to see if it is better. >>> >> >> OK....   I forgot to ask.  This is F34 installed from what Live Image? > > This system was installed too many years ago to remember and upgraded every year. > I see.  What desktop and display manager?