[ovirt-users] 100% memory usage on desktop environments
djasa at redhat.com
Thu May 19 10:18:16 UTC 2016
On St, 2016-05-18 at 16:52 +0100, Nicolás wrote:
> 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...).
> 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?
> Users mailing list
> Users at ovirt.org
Try disabling KMS (by blacklisting qxl module). IIRC it was new by 14.04
release time while UMS was already mature.
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