[Qemu-devel] -vga qxl

[Qemu-devel] -vga qxl

[Rick Vernam]

it seems that qxl is not working correctly with any of the 0.15 releases thus 
far.  this includes qemu and qemu-kvm.

when I start qemu like so:
qemu-system-x86_64 -cpu host -enable-kvm -m 768 -usb -vga qxl -monitor stdio
I get a black screen.

when I start with -vga std:
qemu-system-x86_64 -cpu host -enable-kvm -m 768 -usb -vga std -monitor stdio
I see the seabios screen, etc.

qemu has been configured like
./configure --target-list=x86_64-softmmu --disable-curses  --disable-curl --
audio-drv-list=alsa --audio-card-list=sb16,ac97,hda --disable-bluez --enable-
vhost-net --enable-spice

I've also configured with --disable-vnc and --disable-opengl with the same 
results

Am I using this wrong, or is this a bug?

Re: [Qemu-devel] -vga qxl

[Daniel P. Berrange]

On Thu, Aug 04, 2011 at 11:03:10AM -0500, Rick Vernam wrote:
> it seems that qxl is not working correctly with any of the 0.15 releases thus 
> far.  this includes qemu and qemu-kvm.
> 
> when I start qemu like so:
> qemu-system-x86_64 -cpu host -enable-kvm -m 768 -usb -vga qxl -monitor stdio
> I get a black screen.

I recently had black screen problems with QXL in 0.14.x that turned out to
actually be a Seabios bug due to the default 64MB vram QXL has. I suspect
this would hit 0.15.x builds too. If this is what you're hitting, then
reducing the vram to 32MB is a temporary workaround that should help, eg

   -vga qxl -global qxl-vga.vram_size=33554432 


> when I start with -vga std:
> qemu-system-x86_64 -cpu host -enable-kvm -m 768 -usb -vga std -monitor stdio
> I see the seabios screen, etc.
> 
> qemu has been configured like
> ./configure --target-list=x86_64-softmmu --disable-curses  --disable-curl --
> audio-drv-list=alsa --audio-card-list=sb16,ac97,hda --disable-bluez --enable-
> vhost-net --enable-spice
> 
> I've also configured with --disable-vnc and --disable-opengl with the same 
> results
> 
> Am I using this wrong, or is this a bug?


Regards,
Daniel
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Re: [Qemu-devel] -vga qxl

[Rick Vernam]

On Thursday 04 August 2011 11:09:30 Daniel P. Berrange wrote:
> On Thu, Aug 04, 2011 at 11:03:10AM -0500, Rick Vernam wrote:
> > it seems that qxl is not working correctly with any of the 0.15 releases
> > thus far.  this includes qemu and qemu-kvm.
> > 
> > when I start qemu like so:
> > qemu-system-x86_64 -cpu host -enable-kvm -m 768 -usb -vga qxl -monitor
> > stdio I get a black screen.
> 
> I recently had black screen problems with QXL in 0.14.x that turned out to
> actually be a Seabios bug due to the default 64MB vram QXL has. I suspect
> this would hit 0.15.x builds too. If this is what you're hitting, then
> reducing the vram to 32MB is a temporary workaround that should help, eg
> 
>    -vga qxl -global qxl-vga.vram_size=33554432
That took care of the black screen.  Thanks.

> 
> > when I start with -vga std:
> > qemu-system-x86_64 -cpu host -enable-kvm -m 768 -usb -vga std -monitor
> > stdio I see the seabios screen, etc.
> > 
> > qemu has been configured like
> > ./configure --target-list=x86_64-softmmu --disable-curses  --disable-curl
> > -- audio-drv-list=alsa --audio-card-list=sb16,ac97,hda --disable-bluez
> > --enable- vhost-net --enable-spice
> > 
> > I've also configured with --disable-vnc and --disable-opengl with the
> > same results
> > 
> > Am I using this wrong, or is this a bug?
> 
> Regards,
> Daniel

Re: [Qemu-devel] -vga qxl

[Gerd Hoffmann]

   Hi,

> I recently had black screen problems with QXL in 0.14.x that turned out to
> actually be a Seabios bug due to the default 64MB vram QXL has.

It is a seabios issue indeed.

> I suspect
> this would hit 0.15.x builds too. If this is what you're hitting, then
> reducing the vram to 32MB is a temporary workaround that should help, eg
>
>     -vga qxl -global qxl-vga.vram_size=33554432

There is a fixed seabios binary @ http://spice-space.org/download/seabios/

Patches are all upstream, so just fetching the latest seabios bits (git 
master branch) and building yourself will work too.

cheers,
   Gerd

Re: [Qemu-devel] -vga qxl

[Rick Vernam]

On Thursday 04 August 2011 13:15:35 Gerd Hoffmann wrote:
>    Hi,
> 
> > I recently had black screen problems with QXL in 0.14.x that turned out
> > to actually be a Seabios bug due to the default 64MB vram QXL has.
> 
> It is a seabios issue indeed.
> 
> > I suspect
> > this would hit 0.15.x builds too. If this is what you're hitting, then
> > reducing the vram to 32MB is a temporary workaround that should help, eg
> > 
> >     -vga qxl -global qxl-vga.vram_size=33554432
> 
> There is a fixed seabios binary @ http://spice-space.org/download/seabios/
Yep, I put that bios in and removed -global qxl-vga.vram_size=33554432 from 
the comand line, and it worked just fine.

Thanks.
> 
> Patches are all upstream, so just fetching the latest seabios bits (git
> master branch) and building yourself will work too.
> 
> cheers,
>    Gerd

Re: [Qemu-devel] -vga qxl

[Daniel P. Berrange]

On Thu, Aug 04, 2011 at 08:15:35PM +0200, Gerd Hoffmann wrote:
>   Hi,
> 
> >I recently had black screen problems with QXL in 0.14.x that turned out to
> >actually be a Seabios bug due to the default 64MB vram QXL has.
> 
> It is a seabios issue indeed.
> 
> >I suspect
> >this would hit 0.15.x builds too. If this is what you're hitting, then
> >reducing the vram to 32MB is a temporary workaround that should help, eg
> >
> >    -vga qxl -global qxl-vga.vram_size=33554432
> 
> There is a fixed seabios binary @ http://spice-space.org/download/seabios/
> 
> Patches are all upstream, so just fetching the latest seabios bits
> (git master branch) and building yourself will work too.

Great, is there an intention to rebase Seabios in QEMU to pull this in
before the release of 0.15 ?

Regards,
Daniel
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Re: [Qemu-devel] -vga qxl

[Gerd Hoffmann]

   Hi,

>> Patches are all upstream, so just fetching the latest seabios bits
>> (git master branch) and building yourself will work too.
>
> Great, is there an intention to rebase Seabios in QEMU to pull this in
> before the release of 0.15 ?

Anthony doesn't want change the bios that shortly before cutting a 
release.  So my backup plan is to get that into master, then 0.15.1

cheers,
   Gerd

Re: [Qemu-devel] -vga qxl

[Daniel P. Berrange]

On Fri, Aug 05, 2011 at 11:02:00AM +0200, Gerd Hoffmann wrote:
>   Hi,
> 
> >>Patches are all upstream, so just fetching the latest seabios bits
> >>(git master branch) and building yourself will work too.
> >
> >Great, is there an intention to rebase Seabios in QEMU to pull this in
> >before the release of 0.15 ?
> 
> Anthony doesn't want change the bios that shortly before cutting a
> release.  So my backup plan is to get that into master, then 0.15.1

Ok, I guess Fedora users can get the fix anyway, since we build seabios
from standalone source that we can trivially patch.

Regards,
Daniel
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