I think I have found a solution. According to http://www.thinkwiki.org/wiki/Xorg_RandR_1.2#xorg.conf Virtual Size should be set to 2048x2048 (maximum possible 3D accelerated resolution for Intel chips) in xorg.conf. If I do this hotplugging of the widescreen monitor works fine. Xrandr shows the correct resolution. So it seems that Xorg sets an Virtual size on start which is as high as the needed resolution (x resolution value * x resolution value) but if a Display with a higher resolution is connected it can only use resolutions which are the same or lower than the virtual one. There are two possible solutions imho. Xorg should use the maximum virtual size if it doesn't need so much mem or the better one: Xorg should be able to change the virtual size on the fly if a monitor with a higher resolution is hotplugged.
-- widescreen resolution isn't recognized for external monitor after hotplugging but after X start [i915] https://bugs.launchpad.net/bugs/158415 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
