I will put into a few scenarios:
1 - LVDS1 + DP1
Dell U2713HM using a Display Port cable (display) to a Mini Display Port (Notebook).
No adapters.
This is where the logs belongs to.
Some random time after boot (15min, 1hour), the DP1 screen will blank for a period between 2s to 5s and come back again.
This will keep repeating for 5 to 15 min endless.
2 - LVDS1 + HDMI1
In this case, the U2713M display is using the HDMI port and a HDMI do mini Display Port adapter.
I can get the 2560x1440 resolution only if I lower the frequence to 41hz or lower (which I believe is a HDMI limitation).
No problem at all.
3 - LVDS1 + DP1 + VIRTUAL2
Same as (1) with and extra screen on bumblebee: intel-virtual-output -b
This time the U2713M display enters in sleep mode instead of blanking and does not come back (by itself).
I believe this is the same trigger from (1), but for some reason it is not just blanking.
To revert this, I have to use xrandr to turn the display off and on (--auto).
4 - LVDS1 + HDMI1 + VIRTUAL2
Same as (2) with bumblebee.
No problem at all too.
I am not sure if this could be a faulty display or cable if not the driver. (or how to detect it).
Thanks again.
-rsd
2013/12/11 Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx>
I was hoping for the dmesg from the start (which lets me check the
kernel command line and i915 initialization).
I don't see anything particularly wrong with that. There's the
occasional dimming of the backlight - that's not what you're referring
to is it?
Could you describe the problem a bit more please?
BR,
Jani.
> I kept the config a simple as possible. No bumblebee, just LVDS1 and DP1
> without adaptors.
>
> my Xorg.0.log is this:
> http://pastebin.com/2vK37TNr
>
>
>
> Thanks!
> -rsd
>
>
> 2013/12/10 Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx>
>
>> On Mon, 09 Dec 2013, Raul Dias <raul@xxxxxxxxxxx> wrote:
>> > Hello,
>> >
>> > I have a Dell L502x which have a optimus Graphic Pack:
>> >
>> > 00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core
>> > Processor Family Integrated Graphics Controller (rev 09) (prog-if 00 [VGA
>> > controller])
>> > Subsystem: Dell Device 050e
>> > Flags: bus master, fast devsel, latency 0, IRQ 51
>> > Memory at f1400000 (64-bit, non-prefetchable) [size=4M]
>> > Memory at e0000000 (64-bit, prefetchable) [size=256M]
>> > I/O ports at 4000 [size=64]
>> > Expansion ROM at <unassigned> [disabled]
>> > Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
>> > Capabilities: [d0] Power Management version 2
>> > Capabilities: [a4] PCI Advanced Features
>> > Kernel driver in use: i915
>> >
>> >
>> > Using driver:
>> > 2.99.905+git20131023.b70390b4
>> >
>> > When I use a DELL U2713HM Monitor on the DisplayPort, it will flash
>> blank
>> > for 5 seconds in a 10 minutes interval.
>> > The monitor is at 2560x1440 (60hz).
>> >
>> > This is not ideal, but I can live with.
>> >
>> >
>> > The big problem is when using bumblebee with intel-virtual-output -b.
>> >
>> > In this case the monitor will enter in energy save state instead.
>> >
>> > The only way back is to turn it off and on with xrandr:
>> >
>> > xrandr --output DP1 --off
>> > xrandr --output DP1 --auto
>> >
>> > The odd thing is if I use instead a Mini DisplayPort adapter to a Dual
>> DVI
>> > output, this problem will not happen.
>> >
>> > The downside of this solution is that I will need to add a new mode at
>> 41hz
>> > with:
>> >
>> > xrandr --newmode "2560x1440_41" 162.00 2560 2608 2640 2720 1440
>> > 1443 1448 1468 +hsync +vsync
>> >
>> >
>> > So, What I am looking at is the source of the problem:
>> >
>> > If the source of the problem is the driver, which debug information
>> should
>> > I provide?
>>
>> Please provide dmesg with drm.debug=0xe module parameter from early boot
>> to the problem. If the problem takes a long time to reproduce, you can
>> provide two dmesgs, one from early boot and another covering the
>> problem.
>>
>> BR,
>> Jani.
>>
>>
>> >
>> > Or is it a problem with the DP of the monitor?
>> >
>> > Or a problem with the Display Card?
>> >
>> > Or should I lower the frequency in the DisplayPort (as with the DVI)?
>> >
>> >
>> > thanks
>> > -rsd
>> > _______________________________________________
>> > Intel-gfx mailing list
>> > Intel-gfx@xxxxxxxxxxxxxxxxxxxxx
>> > http://lists.freedesktop.org/mailman/listinfo/intel-gfx
>>
>> --
>> Jani Nikula, Intel Open Source Technology Center
>>
--
Jani Nikula, Intel Open Source Technology Center
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