I was comparing the dmesg from the upstream kernel and the Ubuntu kernel and I noticed that the upstream kernel has an extra error message "failed to create device file for power profile" and sysfs "cannot create duplicate filename '/devices/pci0....'
I do not have the knowledge of the kernel to decide whether these error messages are unrelated or related to the bug I am reporting. The issue where the card locks up and I see messages complaining about 'rings' in dmesg is identical on both the Ubuntu kernel and the upstream kernel. It should be noted that this issue also affects Ubuntu 12.04, Ubuntu 14.04 in addition to the 15.04 I have reported. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1507150 Title: [all variants] - Radeon HD3650 - radeon.dpm=1 - ring 0 stalled for more than 10 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1507150/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs