Created attachment 15942 [details] Xorg.0.log with ModeDebug, BusType PCI and DRI off Reported in Ubuntu Hardy using -ati driver from git 2008-04-04 and xorg-server 2:1.4.1~git20080131-1ubuntu6, https://bugs.launchpad.net/bugs/214105 At start-up an initial mode of 1440x900 is selected, which makes the monitor go black. ddcprobe does not list this resolution, but it appears in the "probed modes". ATI Radeon 9250 5960 (AGP). (DRI was turned off in the attached log, since the AGP speed mismatch would freeze the computer.)
Created attachment 15943 [details] ddcprobe output
if your xorg.conf has a monitor section please remove it..
Thanks, removing the Monitor section did the trick. How does it work? Is another way of selection done if monitor frequencies are specified? Is the ddc probing then ignored?
If there is no monitor section we just believe the monitor, if there is a monitor section we check the modes against the constraints of the monitor section, which means the timings in the monitor section constrain the modes wrongly.
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