Output problems with 945GM
Matteo Brusa
matteo.brusa at kaasa.com
Fri Dec 7 08:36:56 PST 2007
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...
This works, great.
It would be really helpful to have this mentioned in the man page.
>> 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
BTW, the xvidtune tool does not work at all, any configuration (included the current working preset)
is not accepted as valid, no matter if i'm in VGA or DVI mode. I hoped i could fix the overscan
issue with it.
>> I also tried to disable DDC; in this case i cannot set any video mode with
>> randr. Do i need to use the 915resolution tool, or it's not relevant
>> anymore?
>
> It's not relevant anymore and should generally be avoided...
>
>> What is the output name for the component: TDMS-1, VGA?
>
> I'm not sure what you mean here, TMDS-1 and VGA are separate outputs...
With my motherboard came a DVI dongle/splitter with VGA, DVI and component (3 RCA) plugs.
I just discovered that the component plugs are mapped to TV output. The only resolution i get here
is a poor 1024x768 interlaced. I tried to set manually the monitor section similar to the following,
without any success.
Section "Monitor"
Identifier "TVMon"
# Option "Ignore" "true"
# Option "Enable" "false"
HorizSync 30-61
VertRefresh 29-75
Modeline "1024x768" 26.89 1024 1025 1088 1120 768 769 800 801
Modeline "1280x720x25" 83.700 1280 1780 1828 2172 720 751 754 769 +hsync +vsync
Modeline "1360x768" 85.50 1360 1424 1536 1792 768 771 777 795 +hsync +vsync
Modeline "1280x720_o" 74.25 1280 1390 1430 1650 720 725 730 750 +hsync +vsync
Modeline "1360x768" 85.50 1360 1424 1536 1792 768 771 777 795 +hsync +vsync
Modeline "1360x768_60.00" 84.75 1360 1432 1568 1776 768 771 781 798 -hsync +vsync
Modeline "1360x768_50.00" 69.00 1360 1416 1552 1744 768 771 781 793 -hsync +vsync
Modeline "1360x768R" 72.00 1360 1408 1440 1520 768 771 781 790 +hsync -vsync
Modeline "1152x672" 62.25 1152 1208 1320 1488 672 675 685 699 -hsync +vsync
Modeline "1920x1200" 154 1920 1968 2000 2080 1200 1203 1209 1235 +HSync -Vsync
Modeline "1280x768_60.00" 79.50 1280 1344 1472 1664 768 771 781 798 -hsync +vsync
Modeline "1920x1080" 148.5 1920 1960 2016 2200 1080 1082 1088 1125 -hsync +vsync
EndSection
How can i get a resolution similar to the VGA or DVI output?
Here's xrandr snippet:
TV connected 1024x768+0+0 (0x62) normal (normal left inverted right) 0mm x 0mm
Identifier: 0x4f
Timestamp: -1362011090
Subpixel: unknown
Clones:
CRTC: 0
CRTCs: 0 1
BOTTOM: 37 (0x00000025) range: (0,100)
RIGHT: 46 (0x0000002e) range: (0,100)
TOP: 36 (0x00000024) range: (0,100)
LEFT: 54 (0x00000036) range: (0,100)
TV_FORMAT: NTSC-M
supported: NTSC-M NTSC-443 NTSC-J PAL-M
PAL-N PAL 480p at 59.94Hz 480p at 60Hz
576p 720p at 60Hz 720p at 59.94Hz 720p at 50Hz
1080i at 50Hz 1080i at 60Hz 1080i at 59.94H
1024x768 (0x62) 26.9MHz
h: width 1024 start 1025 end 1088 total 1120 skew 0 clock 24.0KHz
v: height 768 start 769 end 800 total 801 clock 30.0Hz
800x600 (0x63) 17.0MHz
h: width 800 start 801 end 864 total 896 skew 0 clock 19.0KHz
v: height 600 start 601 end 632 total 633 clock 30.0Hz
848x480 (0x64) 14.5MHz
h: width 848 start 849 end 912 total 944 skew 0 clock 15.4KHz
v: height 480 start 481 end 512 total 513 clock 30.0Hz
640x480 (0x65) 11.3MHz
h: width 640 start 641 end 704 total 736 skew 0 clock 15.4KHz
v: height 480 start 481 end 512 total 513 clock 30.0Hz
Thanks again,
Matteo
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