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?
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
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