There is a inconsistency in behaviour betwenn the intel randr 1.2 driver and the radeon randr 1.2 driver when two displays (i.e. a Notebook panel and an external Display) are connected. The intel-driver selects for both displays the common resolution with the highest resolution (i.e. 1280x1024 for a panel wirh 1400x1050 and a display with 1600x1200 where both accept the 1280x1024). The radeon driver selects for each display its "natural" (highest) resolution so that the two displays may come up with different resolutions. IMHO it would be good if both of these important randr 1.2 drivers show the same behaviour. Which one is the better - i dont know, but I feel that the intel behaviour is better with respect to the expectations of "old" (pre-randr-1.2-capable) window managers because these are a little bit confused with the different resolutions (at least kwin/kicker). Thanks for the really great work on randr 1.2 - we use it no yet regulary but it works really good!!
That is all handled by the server so the behavior should be consistent. Use randr to see what modes are available for each output. I suspect what you are seeing is a limitation of what modes are available on each output for each display device.
(In reply to comment #1) > That is all handled by the server so the behavior should be consistent. Use > randr to see what modes are available for each output. I suspect what you are > seeing is a limitation of what modes are available on each output for each > display device. > Thank you, I checked again and indeed my conclusion was wrong. The intel driver refuses for any reason to set the higher resolution mode for the external display. It seems that only by luck both modes (panel and external display) are the same as a result. I have to check further.
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