[Nouveau] [Bug 76319] New: [NVE6] MMIO FAULT, black screen on K2100M

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=76319

          Priority: medium
            Bug ID: 76319
          Assignee: nouveau at lists.freedesktop.org
           Summary: [NVE6] MMIO FAULT, black screen on K2100M
        QA Contact: xorg-team at lists.x.org
          Severity: blocker
    Classification: Unclassified
                OS: Linux (All)
          Reporter: d-bugzilla at moens.cc
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: git
         Component: Driver/nouveau
           Product: xorg

Created attachment 95999
  --> https://bugs.freedesktop.org/attachment.cgi?id=95999&action=edit
# grep -n -i nouveau messages.out > messages.filtered

Experiencing a black screen when starting X on a Dell Precision M4800 QHD+
laptop (NVE6).
The internal screen size is 3200x1800 ; the DP-attached Dell UP2414Q measures
3840x2160.

The system is fully functional (ssh-enabled) and responds to VT switches
(CTRL-ALT-Fx), but all screens (X & VT) are black.

Sometimes (after a couple of minutes), I do notice a change in screen
brightness (power saving function ?).


- Fedora rawhide :
kernel-3.14.0-0.rc7.git0.1.fc21.x86_64
xorg-x11-server-Xorg-1.15.0-5.fc21.x86_64
xorg-x11-drv-nouveau-1.0.10-1.fc21.x86_64

- lscpi :
01:00.0 VGA compatible controller: NVIDIA Corporation GK106GLM [Quadro K2100M]
(rev a1)

- Kernel command line:
BOOT_IMAGE=/vmlinuz-rawhide-nouveau root=/dev/mapper/vg01-rootfs4 ro
rd.lvm.lv=vg01/rootfs4 vconsole.font=latarcyrheb-sun16 LANG=en_US.UTF-8
nouveau.debug=PDISP=debug,VBIOS=trace drm.debug=0xe

- Recompiled latest http://cgit.freedesktop.org/~darktama/nouveau/ as of
2014-03-18.



In the attached messages.filtered, X is started at line 1170.

As I am trying for several weeks now to get this system in a usable shape (Dell
disabled Optimus in the BIOS, and there are VT issues with the nVidia binary
blob), I am fully willing to recompile & test whatever you can possibly throw
at me.

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