[CentOS] Centos 7 and Kably lake: black screen

Sat Nov 19 21:12:44 UTC 2016
Louis Lagendijk <louis at fazant.net>

On Wed, 2016-11-16 at 16:57 +0100, Louis Lagendijk wrote:
> 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)
> 
I now have the kernel-ml working. I missed updating the linux-firmware
from elrepo. I still see errors on a pcieport, but things seem to work
fine.

BR, Louis