[CentOS] Centos 7 and Kably lake: black screen

[Louis Lagendijk]

On Mon, 2016-11-14 at 06:48 -0600, Johnny Hughes wrote:
> On 11/12/2016 02:39 PM, Louis Lagendijk wrote:
> > 
> > On Sat, 2016-11-12 at 15:34 -0500, Fred Smith wrote:
> > > 
> > > On Sat, Nov 12, 2016 at 09:15:22PM +0100, Louis Lagendijk wrote:
> > > > 
> > > > 
> > > > I got a new laptop as my old one died: an HP Probook 470 G4. 
> > > > I installed Centos 7 1511.
> > > > The laptop has a Kaby Lake i5 CPU and an 
> > > > 01:00.0 3D controller: NVIDIA Corporation Device 134e (rev
> > > > a2). 
> > > > Fedora recognizes it as a GM108M/930MX. This may give some
> > > > hints,
> > > > but
> > > > it is not that the standard kernel does not support it, this
> > > > output
> > > > comes from the 4.8.7 mainline kernel which should support this
> > > > configuration? GM108 support was added in kernel 4.7, Kaby lake
> > > > support
> > > > was added in 4.5...
> > > > 
> > > > When I boot nothing shows up after the UEFI Grub menu: the
> > > > system
> > > > runs
> > > > but nothing is shown on the display, except for a non-blinking
> > > > cursor
> > > > in the upper left of the screen. I tried a number of things:
> > > > - Installed the latest ml-kernel from Elrepo (4.8.7-1)
> > > > - I also tried the following on the kernel commandline:
> > > > 	nomodeset i915.nomodeset=0 nouveau.modeset=0
> > > > Nothing changes the fact that there is no display.
> > > > 
> > > > I had to install Centos 7 using vnc as even a text install did
> > > > not
> > > > work
> > > > 
> > > > Does anybody have some idea what the cause could be and what to
> > > > try
> > > > next?
> > > 
> > > Did you try CTRL-ALT-F2 or -F3 ? perhaps X has just died (or not
> > > been
> > > properly started), but that would get you a text-mode consosle
> > > from
> > > which to work and experiment.
> > > 
> > > if that works, you could try typing "startx" (lose the quotes).
> > > which
> > > may provide informative errors. or not. 
> > > 
> > > YMMV
> > > 
http://mirror.centos.org/altarch/7/experimental/x86_64/> > > 
> > Thanks for your response, but...
> > No, tried it, but that did not work either unfortunately.
> > 
> 
> If you still have the machine available, try using the experimental
> kernel:
> 
> http://mirror.centos.org/altarch/7/experimental/x86_64/
> 
> Also, what graphic card does it use?


Hi Johnny,
Yes I still have the laptop. Too nice a machine to send back…

The experimental kernel cannot be installed due to a missing xorg-x11-
drv-vmmouse >= 14.0.0 package. Do you know where can I find that
package?

The graphic card may indeed be the problem as the laptop has both a HD
620 in the processor and a Nvidia device 134e (rev A2). with the Fedora
 25 kernel loaded, glxinfo reports that the i915 driver could not be
loaded and that Gallium 0.4 on llvmpipe is used.

The f25 beta kernel does work on Centos after updating xfs-progs and
linux-firmware from f25 Beta (but crashes at a reboot)

> 
> Thanks,
> Johnny Hughes
> 
> 
> 
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