[Intel-gfx] DP1 Monitor Flashes

[Jani Nikula]

On Tue, 10 Dec 2013, Raul Dias <raul at dias.com.br> wrote:
> Hello,
>
> The dmesg for the boot is this:
> http://pastebin.com/aXJQiprL

I was hoping for the dmesg from the start (which lets me check the
kernel command line and i915 initialization).

> The dmesg when the flashing started to occur:
> http://pastebin.com/GkRcpK80

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 at linux.intel.com>
>
>> On Mon, 09 Dec 2013, Raul Dias <raul at dias.com.br> 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 at lists.freedesktop.org
>> > http://lists.freedesktop.org/mailman/listinfo/intel-gfx
>>
>> --
>> Jani Nikula, Intel Open Source Technology Center
>>

-- 
Jani Nikula, Intel Open Source Technology Center