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I'm currently trying to setup an Ubuntu 15.10 to run VMs with VGAPassthrough. The to be dedicated graphics card should be my GTX750ti, with the internal graphics chip of the i7-6700k (Intel HD Graphics 530). But it simply won't work. I've done my research and learnt that the Skylake GPUs are kinda funky as they're pretty new.

Symptoms:

When checking with sudo lspci -k | grep -EA2 'VGA|3D the only Graphics card shown is my 750ti

01:00.0 VGA compatible controller: NVIDIA Corporation GM107 [GeForce GTX 750 Ti] (rev a2)
    Subsystem: ASUSTeK Computer Inc. Device 84ac
    Kernel driver in use: nvidia

I've updated to kernel 4.3.4-040304-generic and still same issue.

So far i

  • tried kernel flag i915.preliminary_hw_support=1 in kernel 4.2
  • updated to kernel 4.3.4
  • tried kernel flag intel_idle.max_cstate=1 in kernel 4.3

Source

Update Still occuring with kernel 4.5.0-040500rc1-generic

Update 2 When setting the CPU Graphics Card as primary display in BIOS, the monitor flickers a bit while loading the kernel, until the monitor turns completely black. Last error before it turns black Propably something related to bus speeds

Update 3 I reviewed the possible duplicate, but the iGPU doesn't get recognized:

[    2.382028] snd_hda_intel 0000:00:1f.3: failed to add i915 component master (-19)

Update 4 Segfault in Xorg.0.log:

[    10.045] (II) intel(0): resizing framebuffer to 3840x1080
[    10.069] (EE) 
[    10.069] (EE) Backtrace:
[    10.069] (EE) 0: /usr/bin/X (xorg_backtrace+0x4e) [0x555b106d668e]
[    10.069] (EE) 1: /usr/bin/X (0x555b10522000+0x1b89f9) [0x555b106da9f9]
[    10.069] (EE) 2: /lib/x86_64-linux-gnu/libc.so.6 (0x7f26ad89b000+0x352f0) [0x7f26ad8d02f0]
[    10.069] (EE) 3: /usr/lib/xorg/modules/drivers/nouveau_drv.so (0x7f26a981b000+0xd74f) [0x7f26a982874f]
[    10.069] (EE) 4: /usr/bin/X (PixmapShareToSlave+0x8e) [0x555b1059694e]
[    10.069] (EE) 5: /usr/bin/X (RRCrtcSet+0x670) [0x555b1063b870]
[    10.069] (EE) 6: /usr/bin/X (ProcRRSetCrtcConfig+0x38b) [0x555b1063c89b]
[    10.069] (EE) 7: /usr/bin/X (0x555b10522000+0x5818f) [0x555b1057a18f]
[    10.069] (EE) 8: /usr/bin/X (0x555b10522000+0x5c34b) [0x555b1057e34b]
[    10.069] (EE) 9: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xf0) [0x7f26ad8bba40]
[    10.069] (EE) 10: /usr/bin/X (_start+0x29) [0x555b105686c9]
[    10.069] (EE) 
[    10.069] (EE) Segmentation fault at address 0x8
[    10.069] (EE) 
Fatal server error:
[    10.069] (EE) Caught signal 11 (Segmentation fault). Server aborting
[    10.069] (EE) 
[    10.069] (EE) 
Please consult the The X.Org Foundation support 
     at http://wiki.x.org
 for help. 
[    10.069] (EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information.
[    10.069] (EE) 
[    10.070] (II) AIGLX: Suspending AIGLX clients for VT switch
[    10.132] (EE) Server terminated with error (1). Closing log file.

Extract from syslog

Jan 27 11:17:35 JARVIS systemd[1]: Starting Hostname Service...
Jan 27 11:17:35 JARVIS dbus[723]: [system] Successfully activated service 'org.freedesktop.hostname1'
Jan 27 11:17:35 JARVIS systemd[1]: Started Hostname Service.
Jan 27 11:17:35 JARVIS gnome-session[1660]: XIO:  fatal IO error 11 (Resource temporarily unavailable) on X server ":0"
Jan 27 11:17:35 JARVIS gnome-session[1660]: after 206 requests (206 known processed) with 10 events remaining.
Jan 27 11:17:35 JARVIS gnome-session[1660]: (gnome-settings-daemon:1693): Gdk-WARNING **: gnome-settings-daemon: Fatal IO error 0 (Success) on X server :0.
Jan 27 11:17:35 JARVIS org.a11y.atspi.Registry[1676]: XIO:  fatal IO error 11 (Resource temporarily unavailable) on X server ":0"
Jan 27 11:17:35 JARVIS org.a11y.atspi.Registry[1676]: after 21 requests (21 known processed) with 0 events remaining.
Jan 27 11:17:35 JARVIS org.gtk.vfs.Daemon[1657]: A connection to the bus can't be made
Jan 27 11:17:35 JARVIS gnome-session[1660]: gnome-session[1660]: WARNING: Lost name on bus: org.gnome.SessionManager
Jan 27 11:17:35 JARVIS gnome-session[1660]: WARNING: Lost name on bus: org.gnome.SessionManager
Jan 27 11:17:35 JARVIS gnome-session[1660]: CRITICAL: We failed, but the fail whale is dead. Sorry....
Jan 27 11:17:35 JARVIS gnome-session[1660]: gnome-session[1660]: CRITICAL: We failed, but the fail whale is dead. Sorry....
Jan 27 11:17:35 JARVIS gdm[902]: GdmDisplay: display lasted 1,042746 seconds
Jan 27 11:17:35 JARVIS gdm[902]: GdmLocalDisplayFactory: maximum number of X display failures reached: check X server log for errors
Jan 27 11:17:36 JARVIS acpid: client 1649[0:0] has disconnected
Community
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Matze
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    Possible duplicate of [Skylake Integrated graphics not working on 15.10](http://askubuntu.com/questions/725092/skylake-integrated-graphics-not-working-on-15-10) – bain Jan 26 '16 at 00:31
  • Do you have any BIOS settings to use the iGPU rather than the discrete video card at boot time? – bain Jan 26 '16 at 00:32
  • I set it to iGPU as the primary display, but the kernel crashes with some errors somewhat related to i915 or so... gonna make a pic and link it - Next thing i'll try is propably Ubuntu 16.04 – Matze Jan 26 '16 at 19:56
  • https://www.dropbox.com/s/v8bd814iepv1eoj/2016-01-26%2002.23.38.png – Matze Jan 26 '16 at 20:33
  • iGPU should work as primary display, the error looks like [bug #1501260](https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1501260). You should [report a bug on freedesktop.org](https://01.org/linuxgraphics/documentation/how-report-bugs). There is also [a patch](https://patchwork.freedesktop.org/patch/60235/) that might fix the issue (if it does, mention that in the bug report). – bain Jan 26 '16 at 20:54
  • `snd_hda_intel` - that's the audio driver, check [this question](http://askubuntu.com/questions/694677/snd-hda-intel-0000001f-3-failed-to-add-i915-component-master-19) where the solution was apparently to uninstall the Nvidia drivers. – bain Jan 26 '16 at 20:57
  • Installed the intel drivers with the graphical installer from their site before trying the nightly builds, and it seems to work with igpu primary :) the card even gets recognized on the pci bus as a vga comptaible card, only problem left is that now xserver/gnome-shell won't startup – Matze Jan 27 '16 at 09:03
  • The last message is [ OK ] Started GNOME Display Manager.... -but nothing happens – Matze Jan 27 '16 at 09:04
  • Check `/var/log/Xorg.0.log` `dmesg` and `/var/log/syslog` for errors. – bain Jan 27 '16 at 09:32
  • Let us [continue this discussion in chat](http://chat.stackexchange.com/rooms/34911/discussion-between-matze-and-bain). – Matze Jan 27 '16 at 10:55

1 Answers1

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try this one:

sudo apt-get purge nvidia*  
sudo reboot 

sudo add-apt-repository ppa:graphics-drivers/ppa
sudo apt-get update
sudo apt-get install nvidia-358
sudo reboot

It should work.

Ashu
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