Hi, sorry it took a while, i wasn't home for a while. I have some news to report; - I've updates the bios to A08, 03/03/2015 (the output from dmidecode), but if i connect the laptop (with the laptopscreen enabled) to the 2x 4k screens, it just logs me out. - I've found that if i disable the laptopscreen and try to use 2x 4k, it works!. Everything is really small though.. ;-) - i was running ubuntu 14.10 and did an inplace upgrade. not sure if this is relevant - a friend of mine is running the newer XPS13 and he has lots of problems connecting just one external monitor on 4k on ubuntu 15.04. I'm not sure its related, but i just wanted to say if it is, we can do some tests on that platvorm too. We also have an precision M3800 we could test.
What to do/test next? ** Changed in: xorg (Ubuntu) Status: Incomplete => New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1455598 Title: connecting 2x 4k displays in ubuntu 15.04 with daisy chain displayport (MST) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1455598/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs