[CentOS] CentOS 7, ATI video, ex-X

Fri Dec 16 16:28:25 UTC 2016
Valeri Galtsev <galtsev at kicp.uchicago.edu>

On Fri, December 16, 2016 10:08 am, m.roth at 5-cent.us wrote:
> A user running gnome came in this morning, clicked on the application
> menu... and it was much shorter than he expected. He could get to firefox,
> and googled about refreshing that... and found something that told him to
> reboot.
> And that's it: I cannot get X up, at all. I just get the "oh, no,
> something failed, please log out and try again".
> Fully updated CentOS 7, [AMD/ATI] Oland [Radeon HD 8570 / R7 240/340 OEM],
> and, like most of us, he uses two monitors.
> .
> I've tried removing the xorg.conf, and renaming
> /etc/X11/xorg.conf.d/20-fglrx.conf, which was there (I didn't put it there
> when I built the box a few months ago.)

What if you boot into runlevel 3 (that is no gdm or kdm...), log in into
virtual console, rename all X related stuff in /etc, and from command line


? What do you get spit on console, and what do you get in xorg log?

Incidentally, do you have security system that watches file changes? That
may tell you a lot. As an alternative, you may take a look at differential
backup - whatever was newly backed up may tell you a story. Unless backup
uses timestamps, and timestamps were fiddled with when change happened.


> I don't see anything even vaguely useful in the Xorg logs... and, for that
> reason, not sure why I'm on Xorg.3.log, other than it may have been
> created by startx. I've tried that, both as root, and as myself, get that
> "oh, no" screen, and when I hit enter to log out, I get a live but black
> screen, completely unresponsive.
> I don't see any errors in dmesg or messages, and I've tried reinstalling
> xorg-x11-drv-ati, which gives me
> xorg-x11-drv-ati-7.6.1-3.20160215gitd41fccc.el7.x86_64.
> Does anyone have any ideas on this? I can't even get a single screen
> working, though it's mirrored, of course, in text mode.
>       mark
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Valeri Galtsev
Sr System Administrator
Department of Astronomy and Astrophysics
Kavli Institute for Cosmological Physics
University of Chicago
Phone: 773-702-4247