Hi, Please see the below discussion with the spice community. libvirt is adding a parameter about video ram to qemu process and this parameter might be responsible of a crash in the qxl at higher resolutions. Spice people tell me that their default ram should be 64 Mbytes. I'm using libvirt 0.9.0 and qemu 0.14, virt-manager 0.8.7. When configuring a guest in virt-manager, cirrus driver is added as default, then you can change it to qxl, but the 9 MB videoram parameter can't be adjusted and it does not automatically change to 64 MB. If you add a 2nd qxl video card, then it has 64 MB memory. The parameter that qemu gets with one qxl device is: -vga qxl -global qxl-vga.vram_size=9437184 The parameter that qemu gets with a second qxl device is: -vga qxl -global qxl-vga.vram_size=9437184 -device qxl,id=video1,vram_size=67108864,bus=pci.0,addr=0x8 Is this a bug in libvirt or other related tools? Thanks, Br, Emre ---------- Forwarded message ---------- From: Emre Erenoglu <erenoglu@gmail.com> Date: Wed, May 4, 2011 at 7:42 PM Subject: Re: [Spice-devel] windows bsod with spice 0.8.1 To: Emre Erenoglu <erenoglu@gmail.com>, spice-devel@freedesktop.org On Wed, May 4, 2011 at 6:00 PM, Alon Levy <alevy@redhat.com> wrote:
On Wed, May 4, 2011 at 2:12 PM, Alon Levy <alevy@redhat.com> wrote:
On Wed, May 04, 2011 at 01:45:39PM +0400, Emre Erenoglu wrote:
On Wed, Apr 27, 2011 at 1:16 AM, Emre Erenoglu <erenoglu@gmail.com> wrote:
Hi,
I started to see frequent crashes with my guests running windows xp and windows server 2003 x86. The bsod appears on qxldd.dll. I can give further info if needed.
The host is Linux x86_64, qemu 0.14, spice 0.8.1. Guest has qxl 0.6.1 drivers loaded. I may revert back to 0.8.0 since it was not crashing. Nothing changed in the guests when I upgraded spice from 0.8.0 to 0.8.1.
Some updates on the original issue. I checked a lot and I found out
issue continued with any version of spice and guest qxl drivers.
I finally digged down to the point that, the qemu comment line which states " -global qxl-vga.vram_size=9xxxxxx " parameter is the problem. When
guest is started with 9 MB of video memory given as comment line
the the parameter
to qemu, the guest qxldd driver crashes with BSOD.
Why was it started with 9MB? anyway, good catch, we should add a check for this in the driver (and probably just refuse to load). Could you open a bug on this in bugzilla.freedesktop.org?
This is added by libvirt (virt-manager) when launching qemu. Do we need to file it against libvirt or against spice? I will post this to the
list also.
Btw, rather than refusing to load, I think we should just limit the
On Wed, May 04, 2011 at 05:10:31PM +0400, Emre Erenoglu wrote: that libvirt possible
resolutions. I'm not sure if the resolutions are the issue though. The crash was not happening immediately and it was working OK with that 9 MB memory. When I launched outlook, or IE8, or just in the middle of an application, it could crash and bsod.
But that number doesn't make any sense - the spice default is 64MB, we never tested with less then that. It is probably fixable like you say, but until that's fixed why not stick to the spice default?
Well, this parameter is not configurable from the virt-manager UI and it configures 9 MB to the command line of qemu by libvirt (even latest 0.9.0) version. When you add a 2nd VGA adapter, it adds 64 MB to that adapter correctly (-device qxl,id=video1,vram_size=67108864,bus=pci.0,addr=0x8) I guess i need to file a bug report to libvirt too. Emre