kvm-84 screen corruption

kvm-84 screen corruption

[Dustin Kirkland]

Howdy-

I recently merged kvm-84 into Ubuntu Jaunty.

We're experiencing corruption of the VM's screen.  The text becomes
garbled through any one of a number of vectors.  Our bug report with
screenshots can be found at:
 * https://bugs.edge.launchpad.net/ubuntu/+source/kvm/+bug/333920

I can reproduce this very simply by booting a basic image, no
additional options, and cat'ing a file, perhaps 5-10 times.  At some
point, the text is completely jumbled.  A clear/reset will clean
things up temporarily, but it will eventually happen again.

Suggestions?

-- 
:-Dustin

Re: kvm-84 screen corruption

[Aurelien Jarno]

Dustin Kirkland a écrit :
> Howdy-
> 
> I recently merged kvm-84 into Ubuntu Jaunty.
> 
> We're experiencing corruption of the VM's screen.  The text becomes
> garbled through any one of a number of vectors.  Our bug report with
> screenshots can be found at:
>  * https://bugs.edge.launchpad.net/ubuntu/+source/kvm/+bug/333920
> 
> I can reproduce this very simply by booting a basic image, no
> additional options, and cat'ing a file, perhaps 5-10 times.  At some
> point, the text is completely jumbled.  A clear/reset will clean
> things up temporarily, but it will eventually happen again.
> 
> Suggestions?
> 
This is most probably fixed in git, commit
7def4ba752cf629043e884dac8541fa5114c4c91

-- 
  .''`.  Aurelien Jarno	            | GPG: 1024D/F1BCDB73
 : :' :  Debian developer           | Electrical Engineer
 `. `'   aurel32@debian.org         | aurelien@aurel32.net
   `-    people.debian.org/~aurel32 | www.aurel32.net

Re: kvm-84 screen corruption

[Dustin Kirkland]

On Tue, Feb 24, 2009 at 12:01 PM, Aurelien Jarno <aurelien@aurel32.net> wrote:
> This is most probably fixed in git, commit
> 7def4ba752cf629043e884dac8541fa5114c4c91

Great.  Which git?

I checked:
 * git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm.git

And I noticed Debian in your sig, so I also checked:
 * git://git.debian.org/git/collab-maint/kvm.git

Don't see it...

:-Dustin

Re: kvm-84 screen corruption

[Anthony Liguori]

Dustin Kirkland wrote:
> On Tue, Feb 24, 2009 at 12:01 PM, Aurelien Jarno <aurelien@aurel32.net> wrote:
>   
>> This is most probably fixed in git, commit
>> 7def4ba752cf629043e884dac8541fa5114c4c91
>>     
>
> Great.  Which git?
>   

kvm-userspace.git.  That changeset merged against QEMU SVN which is 
where the fix really happened.

Regards,

Anthony Liguori

> I checked:
>  * git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm.git
>
> And I noticed Debian in your sig, so I also checked:
>  * git://git.debian.org/git/collab-maint/kvm.git
>
> Don't see it...
>
> :-Dustin
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>   

Re: kvm-84 screen corruption

[Dustin Kirkland]

On Tue, Feb 24, 2009 at 3:29 PM, Anthony Liguori <anthony@codemonkey.ws> wrote:
> kvm-userspace.git.  That changeset merged against QEMU SVN which is where
> the fix really happened.

Okay, hmm...  I've applied this fix (plus another queued one that
Anthony sent my way).

I'm still seeing the screen corruption.

The easily way to reproduce it, as I said before, seems to be cat'ing
a file.  I've been using `cat /proc/cpuinfo`.  And I've notice that
this happens on the 7th invocation after a fresh boot, every time.

:-Dustin

RE: kvm-84 screen corruption

[Zhang, Xiantao]

I can confirm it on ia64 platform with kvm-84 and kvm-userspace upstream source.  Another issue is that the text color is not correct. 
Xiantao

Aurelien Jarno wrote:
> Dustin Kirkland a écrit :
>> Howdy-
>> 
>> I recently merged kvm-84 into Ubuntu Jaunty.
>> 
>> We're experiencing corruption of the VM's screen.  The text becomes
>> garbled through any one of a number of vectors.  Our bug report with
>>  screenshots can be found at: *
>> https://bugs.edge.launchpad.net/ubuntu/+source/kvm/+bug/333920 
>> 
>> I can reproduce this very simply by booting a basic image, no
>> additional options, and cat'ing a file, perhaps 5-10 times.  At some
>> point, the text is completely jumbled.  A clear/reset will clean
>> things up temporarily, but it will eventually happen again.
>> 
>> Suggestions?
>> 
> This is most probably fixed in git, commit
> 7def4ba752cf629043e884dac8541fa5114c4c91
> 
> --
>   .''`.  Aurelien Jarno	            | GPG: 1024D/F1BCDB73
>  : :' :  Debian developer           | Electrical Engineer
>  `. `'   aurel32@debian.org         | aurelien@aurel32.net
>    `-    people.debian.org/~aurel32 | www.aurel32.net

Re: kvm-84 screen corruption

[Dustin Kirkland]

On Tue, Feb 24, 2009 at 8:47 PM, Zhang, Xiantao <xiantao.zhang@intel.com> wrote:
> I can confirm it on ia64 platform with kvm-84 and kvm-userspace upstream source.  Another issue is that the text color is not correct.

For what it's worth, I was able to fix this in kvm
(1:84+dfsg-0ubuntu5) jaunty by applying:
 * http://svn.savannah.gnu.org/viewvc/trunk/exec.c?r1=6601&r2=6628&pathrev=6628&root=qemu&view=patch

That patch was attached to:
 * http://sourceforge.net/tracker/?func=detail&atid=893831&aid=2556746&group_id=180599

:-Dustin

Re: kvm-84 screen corruption

[Aurelien Jarno]

Dustin Kirkland a écrit :
> On Tue, Feb 24, 2009 at 8:47 PM, Zhang, Xiantao <xiantao.zhang@intel.com> wrote:
>> I can confirm it on ia64 platform with kvm-84 and kvm-userspace upstream source.  Another issue is that the text color is not correct.
> 
> For what it's worth, I was able to fix this in kvm
> (1:84+dfsg-0ubuntu5) jaunty by applying:
>  * http://svn.savannah.gnu.org/viewvc/trunk/exec.c?r1=6601&r2=6628&pathrev=6628&root=qemu&view=patch
> 

This is exactly the patch I told you to try, so it is already in the git
tree.

Aurelien

-- 
Aurelien Jarno	                        GPG: 1024D/F1BCDB73
aurelien@aurel32.net                 http://www.aurel32.net