i945GM shows only 640x480 on second head

emisca emisca.ml at gmail.com
Tue Apr 10 02:49:59 PDT 2007

So, I'll try to compile the new modesetting driver.
Does I necessarly need to upgrade the Xorg server to 1.2.99, mesa
6.5.2, libxrand 1.2 and libdrm 2.3? Or I can simply update libdrm and
the intel driver?

I'm using Debian Etch with xorg 7.1 and i810 1.7.4 currently. I've
asked to the debian-x folks and they said that the
xserver-xorg-video-intel 1.9.94 includes the needed xorg 1.3 headers
to compile (see

I would like to stick with my current xorg version, if it's possible...

Another question, does ddc informations affect dpms behaviour? On my
notebook dpms don't work (the display after few minutes turned off
goes on randomly).

This is what ddc reports:

(II) LoadModule: "ddc"
(II) Reloading /usr/lib/xorg/modules/libddc.so
(II) I810(0): VESA VBE DDC supported
(II) I810(0): VESA VBE DDC Level 2
(II) I810(0): VESA VBE DDC transfer in appr. 1 sec.
(II) I810(0): VESA VBE DDC read successfully
(II) I810(0): Manufacturer: AUO  Model: 1974  Serial#: 0
(II) I810(0): Year: 2005  Week: 1
(II) I810(0): EDID Version: 1.3
(II) I810(0): Digital Display Input
(II) I810(0): Max H-Image Size [cm]: horiz.: 33  vert.: 21
(II) I810(0): Gamma: 2.20
(II) I810(0): No DPMS capabilities specified; RGB/Color Display
(II) I810(0): First detailed timing is preferred mode
(II) I810(0): redX: 0.600 redY: 0.340   greenX: 0.310 greenY: 0.560
(II) I810(0): blueX: 0.150 blueY: 0.115   whiteX: 0.313 whiteY: 0.329
(II) I810(0): Manufacturer's mask: 0
(II) I810(0): Supported additional Video Mode:
(II) I810(0): clock: 68.9 MHz   Image Size:  331 x 207 mm
(II) I810(0): h_active: 1280  h_sync: 1301  h_sync_end 1333
h_blank_end 1408 h_border: 0
(II) I810(0): v_active: 800  v_sync: 804  v_sync_end 808 v_blanking:
816 v_border: 0
(II) I810(0):  AUO
(II) I810(0):  B154EW01 V9
(--) I810(0): A non-CRT device is attached to pipe B.
	No refresh rate overrides will be attempted.
(--) I810(0): Maximum space available for video modes: 12288 kByte

If I attach a second monitor on the external vga output, it reports
the same informations also on the other head (with 1280x800 maximum
resolution, attaching an lg 19" flat panel display which supports


2007/4/10, Keith Packard <keithp at keithp.com>:
> On Mon, 2007-04-09 at 23:34 +0200, emisca wrote:
> > It seems that your notebook doesn't report ddc informations. You must
> > disable any check and force the resolution you want (and of course
> > monitor timings) of your external monitor.
> >
> > Also my notebook (hp nx7400) gives bad ddc informations.
> >
> > Could any intel developer tell me if the new modesetting driver has
> > different ddc behaviour?
> Yes, the modesetting driver has significantly different DDC behaviour;
> it's certainly worth a try to see how it fares in this environment.
> --
> keith.packard at intel.com

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