When reporting this bug, I called it a regression because an older kernel package worked, but a more recent one did not. I did not realize that the older one was mainline, and the later one with Ubuntu patches.
The system runs Ubuntu raring. Since raring comes with a 3.8, which I believe does not fully support the DL-195, I installed a 3.11 kernel from Saucy (but nothing else). When at some later point I updated to a more recent Saucy kernel (apparently this time including Ubuntu patches), things stopped working. So yes, I would say it's possible that this has never worked in Ubuntu but only in mainline. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1234818 Title: Regression: DisplayLink DL-195 fails with EAGAIN after upgrade from 3.11.0-031100 to 3.11.0-11 Status in “linux” package in Ubuntu: Confirmed Bug description: My Plugable UGA-2K-A USB 2.0 to DVI adapter (using chipset DisplayLink DL-195, USB ID 17e9:4302) works fine with 3.11.0-031100-generic. However, when upgrading to 3.11.0-11-generic, X11 fails to open the DRI device with [ 8.868] (EE) open /dev/dri/card1: Resource temporarily unavailable Reverting to 3.11.0-031100-generic fixes the problem. Upgrading to current mainline (3.12.0-999.201310030405) also fixes the problem (but causes lots of kernel BUG messages). In both cases, the kernel correctly creates the /dev/fb1 and /dev/dri/card1 devices. There are no error messages in the kernel log. I can bisect this if someone tells me where to find the intermediate versions. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1234818/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
