If I restart gdm everything works fine so it seems that xrandr doesn't use all capabilities to get the correct resolution.
-- widescreen resolution isn't recognized for external monitor after hotplugging but after system 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