OK ... I think that's all I can do for today. I've uploaded as attachments to this original report all the files generated by apport- bug today, and marked the other ticket as a duplicate.
(I apologize for that, but I can't use my personal Launchpad account from the kiosks, and I'm only there once a week, so I used the "RBL Admin" account to generate the requested apport-bug files. I've marked the extra ticket as a duplicate of this one now that I've copied over all the files.) As I noted earlier when I had direct access to the machines, this seems to be a pair of issues, both possibly in the Radeon driver. The "unable to unblank after idle" problem is shown in the Xorg.0.log file from today, and also in the XorgLogOld.txt file from apport-bug -- namely, Xorg errors reporting keyboard and mouse events are being dropped. And, when we do a "hard resume" by issuing Alt-SysRq-k, that sometimes works to get back to the login screen, and sometimes generates a kernel crash in the radeon driver -- as shown in the apr1.full.kern.log (all the /var/log/kern.log* entries from April 1st) and the accompanying kernel stacktrace photo in radeon_kernel_panic1.jpg. Please let me know if there's any further data I can try to collect next week when I'm on-site again. Thanks very much, Chris. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1763273 Title: kernel panic in Radeon driver while screen blank To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1763273/+subscriptions -- ubuntu-bugs mailing list email@example.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs