Jani, for the record, I did my tests with your two patches before I updated the dock firmware, and it definitely did make the hangs go away --- and as I mentioned, I was even able to connect to an external Dell LCD panel using DP without any problems (although the "too many retries" debug message did trigger).
Many thanks for working on this issue, and I agree that the kernel should not be hanging even if the dock is buggy. I have two Ultradocks (one at work and one at home) --- would it be helpful if I keep one unupgraded for now? From looking at the intel-gfx list it sounds like you are planning on changing the infrastructure to use some new infrastructure in the next kernel version or two? If you'd like me to do some testing of the new code with a buggy dock, I'm happy to keep one of my docks at the old firmware version, especially since the two patches seem to be an adequate workaround. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1275794 Title: Lenovo T440s freezes when connected to docking station To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1275794/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
