On Fri, Jul 13, 2012 at 1:47 PM, Pat Riehecky <[log in to unmask]> wrote: > On 07/12/2012 04:06 PM, David Crick wrote: >> >> On Thu, Jul 12, 2012 at 6:47 PM, zxq9<[log in to unmask]> wrote: >>> >>> On 07/11/2012 08:03 PM, Dr Andrew C Aitchison wrote: >>> Just helped a guy out in the slforum IRC yesterday with this same problem >>> on >>> SL 6.1 (nVidia graphics on his system -- the graphics drivers aren't the >>> issue). The resolution was a downgrade. >> >> I just pulled the latest set of updates with all the drivers on my Machine >> B. >> >> Rebooted and once trying to start X the KDE loading screen just flickered >> and >> flickered (as in the actual MONITOR was flickering on and off). When I >> returned >> to it later it had bombed out back to the login screen. >> >> Tried yum --downgrading the xserver, but wasn't having it. >> >> Tried yum --downgrading ALL the 47 just-installed updated packages but >> it complained that only upgrading was allowed. >> >> Had to manually download each of the 47 base OS rpms (thank goodness >> for tab-complete in lftp!) and then do an rpm -ivh --force --nodeps *.rpm >> >> Rebooting and now working off the original OS packages. (Indicentally, I >> discovered this problematic Machine B is actually running SL6.0, whereas >> the >> OK Machine A was on 6.2) >> >> >>> The specific problem in the xorg log was that the evdev input module >>> couldn't load because of a version mismatch. There may be other >>> mismatches, >>> but that was the point xorg gave up. >>> >>> Whenever the graphics drivers load first GDM will display but no input is >>> possible, if the graphics is scheduled after evdev then x won't give you >>> a >>> graphical indication that anything is moving. >> >> >> Pat, does the evdev bit above give you a clue as what else might need >> to be recompiled/updated? >> >> >> David. > > > An updated evdev was posted yesterday, that should resolve it. You may need > to do a 'yum clean all' to get the updated metadata. > > Let me know. > > Pat Unfortunately not! Now that I've looked into it, xorg-x11-drv-evdev-2.6.0-2.el6 was actually one of the 47 updates that were installed onto the SL6.0 machine that resulted in a flickering monitor and failure to load KDE.