Problem with Intel emgd (GMA500)
E.A.B.Piel at tudelft.nl
Mon Oct 17 17:00:07 PDT 2011
Op 10-10-11 14:52, Alan Cox schreef:
>> xrandr: Failed to get size of gamma for output default
>> xrandr: screen cannot be larger that 640x480 (desired size 800x600)
>> xrandr: Configure crtc 0 failed
> xrandr won't allow you to change modes on the fbdev interface. The libdrm
> tools will if it detected any other modes, however it tries to default to
> the reported LCD panel size so you ought to get the size of your panel as
> the default behaviour.
For a long time, plugging a HDMI screen with my laptop would crash it.
However, I've just tried again and to my surprise, with 3.1-rc9, it goes
as far as displaying the picture. Great work!
Nevertheless, the selected mode is 1024x768, which is smaller than the
native modes of both the LCD panel and the external screen (it could be
the highest common resolution, though). So this lead me to two questions:
* Could you explain more how to change the modes of the fbdev? I've
tried the tools with libdrm (modetest, modeprint, kmstest...) and they
all fail to find a compatible device. What argument do you pass them?
Also, fbset displays correct information but when trying to change the
mode it seems to always fail with this:
ioctl FBIOPUT_VSCREENINFO: Invalid argument
* Is there a way to have the two screens display different image (i.e.
not clone mode)? Or maybe just force to use only the external screen
with its native resolution?
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