Output problems with 945GM

[Jesse Barnes]

On Friday, December 07, 2007 8:30 am Matteo Brusa wrote:
> Hi Jesse, thanks for the answer.
> See my inline comments.
>
> Jesse Barnes wrote:
> > On Thursday, December 06, 2007 5:54 am Matteo Brusa wrote:
> >> Hi,
> >> i have some HDTV configuration issues with my 945GM based pc, i hope i'm
> >> in the right place to ask. I'm running Ubuntu 7.10 and therefore the
> >> intel driver version 2:2.1.1-0ubuntu9.
> >>
> >> VGA output
> >> The VGA output works great, it uses the 1360x768 resolution when plugged
> >> to an HDTV. Unfortunately, my actual TV has no VGA input, so i'm trying
> >> to get either HDMI (with DVI adapter cable) or component running.
> >> LDVS
> >> In X, LVDS is always enabled although i have no LCD screen. I tried
> >> "xrandr --ouput LDVS --off" without success, and the intel module does
> >> not support any xorg.conf option to shut it off. Could this be the
> >> reason why xvidtune always shows 1024x768 and not the actual screen
> >> value? Component I always get 1024x768, no matter which Modeline i
> >> specify. Any suggestion?
> >
> > You actually can disable it:
> >
> > Section "Monitor"
> > 	Identifier "Bogus LCD"
> > 	Option "ignore" "true"
> > EndSection
> >
> > Section "Driver"
> >         Identifier "Card0"
> >         Driver "intel"
> >         VendorName "Intel Corporation"
> >         BoardName "Unknown Board"
> >         Option "Monitor-LVDS" "Bogus LCD"
> > EndSection
> >
> > And since we've been getting so many reports about this stuff and always
> > end up pointing people at
> > http://www.intellinuxgraphics.org/dualhead.html, I think I'll update the
> > man page with some more detail...
>
> Great, this works.
> That would be really helpful to have this mentioned in the man page.

I added some more detail to the git tree, hopefully it'll help head off future 
FAQs. :)

> >> TDMS-1
> >> I got 1280x768 working, with noticeable overscan. How can i use the same
> >> 1360x768 with DVI, or get rid of the overscan?
> >
> > What's the output of 'xrandr'?
>
> Here's the snippet relative to this output:
> TMDS-1 connected 1280x720+0+0 (0x62) normal (normal left inverted right)
> 160mm x 90mm Identifier: 0x4e
>          Timestamp:  -1361725529
>          Subpixel:   horizontal rgb
>          Clones:
>          CRTC:       0
>          CRTCs:      0 1
>          EDID_DATA:
>                  00ffffffffffff004c2d000200000000
>                  2a0f01038010098c0ae2bda15b4a9824
>                  15474a20000001010101010101010101
>                  010101010101011d007251d01e206e28
>                  5500a05a0000001e011d00bc52d01e20
>                  b8285540a05a0000001e000000fd0032
>                  3d0f2e08000a202020202020000000fc
>                  0053414d53554e470a202020202001af
>    1280x720 (0x62)   74.2MHz +HSync +VSync
>          h: width  1280 start 1390 end 1430 total 1650 skew    0 clock  
> 45.0KHz v: height  720 start  725 end  730 total  750           clock  
> 60.0Hz 1280x720 (0x63)   74.2MHz +HSync +VSync
>          h: width  1280 start 1720 end 1760 total 1980 skew    0 clock  
> 37.5KHz v: height  720 start  725 end  730 total  750           clock  
> 50.0Hz 640x480 (0x64)   25.2MHz -HSync -VSync
>          h: width   640 start  656 end  752 total  800 skew    0 clock  
> 31.5KHz v: height  480 start  490 end  492 total  525           clock  
> 60.0Hz

Hm, I think using DVI is your best bet (it'll probably give you the best 
picture quality) but your TV doesn't seem to provide a 1360x768 resolution in 
its EDID data?  Or are you overriding it somehow?

Can you post your xorg.conf and Xorg.0.log files?

Thanks,
Jesse