[ovirt-users] 100% memory usage on desktop environments

[nicolas at devels.es]

El 2016-05-19 07:36, Yaniv Kaul escribió:
> On Wed, May 18, 2016 at 6:52 PM, Nicolás <nicolas at devels.es> wrote:
> 
>> Hi,
>> 
>> Probably not an oVirt issue, but maybe someone can help. I've
>> deployed a pretty basic VM (ubuntu 14.04 server, 4GB RAM, 4 CPUs,
>> 15GB storage). Each time I install an additional desktop environment
>> (Gnome, KDE, whatever...), CPU usage rises to 100% all time to the
>> extreme that interacting with the machine becomes impossible (maybe
>> a mouse movement is propagated 3 minutes later or so...).
> 
> Is X properly configured with QXL?
> xorg-x11-drv-qxl RPM (in Fedora / EL - I assume something similar in
> Ubuntu) installed, and x.org [2] CONF file properly set up - something
> like:
> 
> Section "Device"
>  Identifier "qxl"
>  Driver "qxl"
> EndSection
> 
> Section "Screen"
>  Identifier "screen"
>  Device "qxl"
>  DefaultDepth 24
>  SubSection "Display"
>  Depth 24
>  Modes "1024x768"
>  EndSubSection
> EndSection
> 
> Y.
>  

Indeed, the package was installed and everything configured as should. I 
tried removing the qxl driver package from the OS and now everything 
goes smooth as silk... Strange, as supposedly this driver should 
optimize the graphics part.

Thanks all for the help!

Regards.

> 
>> To debug this, I installed LXDE, which is a lightweight desktop
>> environment based on Xorg. I could see there is an Xorg process
>> consuming one of the CPUs and the machine stops responding as far as
>> the desktop environment goes. I have not changed anything in the
>> configuration file.
>> 
>> I could also see this only happens when QXL is chosen as the
>> display driver. When CIRRUS is chosen, everything works smoothly and
>> CPU is ~100% idle. The downside is that we want to use SPICE and
>> CIRRUS won't allow it.
>> 
>> Why does this happen? Is this an OS-side driver issue? Any hint how
>> can it be fixed?
>> 
>> Thanks.
>> 
>> Nicolás
>> _______________________________________________
>> Users mailing list
>> Users at ovirt.org
>> http://lists.ovirt.org/mailman/listinfo/users [1]
> 
> 
> 
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