hybrid-graphics-linux team mailing list archive

[Joaquín Ignacio Aramendía <samsagax@xxxxxxxxx>]

Try not to use the enable/disable scripts of bumblebee. There is one to
switch the card off on startup. Probably is messing around with the
output and module loading.
-- 
Joaquín Ignacio Aramendía <samsagax@xxxxxxxxx>

El vie, 17-06-2011 a las 13:28 +0300, Moshe Nissim escribió:
> On 14/6/11 4:20 PM, Albert Vilella wrote:
> >
> > Right now there is no way of ignoring the intel graphics driver other
> > than directly from the BIOS, and only in certain models, but with the
> > optimus bumblebee you *are* using nvidia hardware *and* nvidia drivers
> > for all the applications you call with optirun. There is a penalty in
> > using VirtualGL routing, but other than that, it does use the nvidia
> > drivers, that are on-par with the Windows drivers in performance.
> >
> > It would be useful if you could run this on Windows and Linux
> > bumblebee to check the performance difference:
> I tried to make this work, but I'm encountering a problem unrelated to
> bumblebee.
> I know this may be the wrong thread to ask, but maybe people already
> solved it.
> 
> First step is to make the Intel driver work with Xorg and have a working
> LCD display.
> (without yest starting the second Xorg for the nVidia card).
> This goes wrong. The LCD gets corrupted during boot, even before Xorg is
> started.
> (In fact, I disabled Xorg for the moment, by going to runlevel 3 instead
> of 5).
> 
> It seems to happen late in the boot, I think at the moment i915 kicks in
> and does the modesetting.
> The LCD goes into a strange state, three-quarters of it is black, and
> the right-hand quarter is
> alternating white and black lines. The image is steady.
> "underneath" everything works, the boot completes, and I can even start
> Xorg  with the intel driver.
> Its just that the actual displayed image remains bad. It does not even
> 'blink' when Xorg starts.
> If I disable modesetting altogether (kernel command-line arg nomodeset)
> the corruption is gone,
> but the intel xorg driver refuses to work. I think I read somewhere that
> on later versions (which I must use,
> having a Sandybrdige graphics hardware), kernel-mode-setting is a
> requirement for it to work.
> Again, this is a Dell Latitude E6420.
> Anyone encountering a similar problem?
>