Hi I don't know how to force a modeline for my HDTV. I hope someone can help me.
I have a Kubuntu 10.04, xorg-edger PPA latest packages, ATI Xpress X1250 built-in graphic chip. For whatever the reasons, the default 1280x720 mode used by the the ati driver is wrong. The TV goes black when I select "1280x720" mode. According to the xorg.0.log (attached), there are 2 "1280x720" modes available (with same names for some weird reasons) : [ 21.523] (II) RADEON(0): Modeline "1280x720"x60.0 74.44 1280 1336 1472 1664 720 721 724 746 -hsync +vsync (44.7 kHz) [ 21.523] (II) RADEON(0): Modeline "1280x720"x60.0 74.25 1280 1390 1430 1650 720 725 730 750 +hsync +vsync (45.0 kHz) Somehow, xserver insists on using the first mode. I want to force it to choose the second one, but don't know how to. I'm sure that the second one works because I typed the following xrandr --newmode "720p" 74.25 1280 1390 1430 1650 720 725 730 750 +HSync +VSync xrandr --addmode DVI-0 720p xrandr --output DVI-0 --mode 720p and it works!. Anyhelp would be greatly appreciated since I'm fighting this for several days already and nearly gaving up. 1080p works but XBMC is noticeably slow at that resolution. XBMC is much smoother at 1024x768 so I'm trying to force 720p as my default mode. xrandr doesn't work for OpenGL program. Thanks Toan
Xorg.0.log.gz
Description: GNU Zip compressed data
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