White screen / black screen

[Ryan Watson]

Hello All -

Thank you for reading this post. I'm having difficulty troubleshooting this
problem. I have a minimal openSUSE install running X with a single Chromium
window open, full-screen, running a webapp. A typical kiosk-mode machine.
It has begun to happen with some regularity that a machine, upon user
interaction or possibly on its own, will flash a white screen. When the
user clicks, via a mouse-click, the screen will flicker black than back to
white.

Nothing is logged via systemd journal of hardware issues. The x.org.log
contains no errors. Restarting X and Chromium do not reset the problem. The
only solution is to reset the PC.

Uptime does not seem to be a facter as sometimes it happens a few hours
after restart, in one instance there was an uptime of 9 days before the
symptom emerged.

We have x11vnc running attached to display :0 for remote troubleshooting --
when a technician connects they see a perfectly normal desktop. Locally all
we see is white.

Force unloading and reloading the i915 module has no affect.

We have not been able to replicate/duplicate this in our lab which has led
to much difficulty in determining the cause and solution to the problem.

We are completely at a loss on this issue. Any suggestions as to a course
of action we can take to repair this or troubleshoot it further?

Regards,
W


* Lenovo M58 Desktop PC
* Intel GMA4500
* i915 kernel module
* openSUSE 13.1
* xorg-x11-server-7.6_1.14.3.901-4.1
* xf86-video-intel-2.99.906-12.1
* kernel-default-3.11.10-7.1


Result of lspci -v:

00:02.0 VGA compatible controller: Intel Corporation 4 Series Chipset
Integrated Graphics Controller (rev 03) (prog-if 00 [VGA controller])
    Subsystem: Lenovo Device 3048
    Flags: bus master, fast devsel, latency 0, IRQ 45
    Memory at fc000000 (64-bit, non-prefetchable) [size=4M]
    Memory at e0000000 (64-bit, prefetchable) [size=256M]
    I/O ports at 1c70 [size=8]
    Expansion ROM at <unassigned> [disabled]
    Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
    Capabilities: [d0] Power Management version 2
    Kernel driver in use: i915
    Kernel modules: i915

00:02.1 Display controller: Intel Corporation 4 Series Chipset Integrated
Graphics Controller (rev 03)
    Subsystem: Lenovo Device 3048
    Flags: bus master, fast devsel, latency 0
    Memory at fc400000 (64-bit, non-prefetchable) [size=1M]
    Capabilities: [d0] Power Management version 2

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