I came to think of a few pieces of additional information that might be useful
for the upstream developers. They might ask for it, but you may also upload it
right away:
1. Kernel Mode Setting is now used in Karmic, so it is actually a kernel module
that takes care of selecting the resolution. This code has been ported from the
intel driver. It is possible to switch back to Userland Mode Setting (UMS) by
adding this the boot parameter i915.modset=0 when booting. The code in the
intel driver will then be used to set the resolution. This should select the
same resolution as with KMS, but unlike the kernel module the intel driver
dumps extra information to Xorg.0.log when the ModeDebug line is present is
xorg.conf (as you have). So if you could boot with UMS and attach the resulting
Xorg.0.log and the output of `xrandr --verbose` that may be valuable
information.
2. You report that this happens when you use both the internal laptop monitor
(LVDS) and the TV as an external monitor. Does it also happen if you disable
the LVDS? You can do that by adding the following section to xorg.conf:
Section "Monitor"
Identifier "My internal monitor"
Option "Ignore" "True"
EndSection
and the following line to the "Device" section:
Option "monitor-LVDS" "My internal monitor"
(with KMS it may be "monitor-LVDS1", but I'm not sure...)
--
[i965] Bad resolution over HDMI in Jaunty
https://bugs.launchpad.net/bugs/340212
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