White screen / black screen

[walter harms]

maybe that is trivial but ...
you have checked connector & cabling ?

When you say black, that means the whole screen goes black, you can not see anything ?

re,
 wh

Am 15.04.2014 20:25, schrieb 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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