Screen freezes on Fedora 23, new system

[John Maheu]

Ctrl-Alt-F2 does not work but I can ssh into the box. Once there everything
looks fine. Log files only really show DMAR: INTR-REMAP problem. I have
restarted gnome but it comes back with a screen flicker and very slow mouse
and keyboard movements. Only way to recover fully is a reboot.

While playing a youtube video today I had a freeze and I could use the
mouse click to start and stop the video but I could do nothing else.

I have tried Ctrl-Alt-SysRq with no luck. Have not tried the other
combinations you linked to.

Perhaps the Firepro is not supported with these kernels I've used. I did
see a post with it working with kernel 4.3 on Debian unstable.

Thanks for the suggestions.
John


> If the keyboard is working at all, you should be able to use the magic
> sysreq keys.
>
> http://www.howtogeek.com/119127/use-the-magic-sysrq-key-on-linux-to-fix-frozen-x-servers-cleanly-reboot-and-run-other-low-level-commands/
>
> It's possible that there is a complete kernel panic, and nothing is
> running, so the keyboard and mouse are unavailable.  The fact that the
> mouse pointer moves and music continues to play makes this unlikely.
> That couldn't happen unless instructions were being processed by the
> CPU.  What if you unplug and plug in the mouse?  Does it start working
> properly?
>
> Did you try Ctrl-Alt-F2 to reach a virtual console?  When in X, the
> virtual consoles are only reachable via the Ctrl-Alt-F2 version.  Once
> you are in a virtual console, you can look at the X logs, examine
> journalctl -r or check processes that are suspended.  You can even kill
> the X server, and restart it if you have to.
>
> If you get no joy, try a different kernel, or downgrade X to an earlier
> version.  It is likely that either the video driver or the X version is
> having a race condition, and locking up.  I use the radeon driver on an
> older amd video card and have no issues at all, so it might be that
> your card is newer and not as well supported.
>
> If all else fails, search at https://bugzilla.redhat.com/ for bugs that
> have your problem (say 'X freeze' or 'radeon'), and add your comments,
> and check for workarounds, or open a new bug describing your problem.
> Open it against X, even though it could be other things.
> --
> users mailing list
> users at lists.fedoraproject.org
> To unsubscribe or change subscription options:
> https://admin.fedoraproject.org/mailman/listinfo/users
> Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct
> Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
> Have a question? Ask away: http://ask.fedoraproject.org
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.fedoraproject.org/pipermail/users/attachments/20160125/ecefa5a5/attachment-0001.html>