screen update problems with Intel HD 4600 + virtual screen

Chris Wilson chris at
Mon Jun 23 03:50:57 PDT 2014

On Mon, Jun 23, 2014 at 12:47:13PM +0200, Krzysztof Halasa wrote:
> Chris Wilson <chris at> writes:
> > Hmm. Whilst it seems odd to have a negative linear offset, I have seen
> > it work elsewhere. Could you try setting
> >   options i915 i915_enable_fbc=0 enable_fbc=0
> > in /etc/modprobe.conf/intel.conf and rebuilding your initramfs?
> This fixed it.
> The negative offset isn't exactly gone, though.
> Many thanks.
> Would you like me to try something else?

I'll leave that to Daniel to try and combine FBC with CRTC viewports...

Chris Wilson, Intel Open Source Technology Centre

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