On 07/18/2012 12:03 PM, Dr Andrew C Aitchison wrote:
> On Tue, 17 Jul 2012, William Lutter wrote:
>
>> Wouldn't you know it, I just rebooted my SL6.0 or 6.1 linux PC prior
>> to leaving town for a week and it hangs on all 3 of the available
>> kernels.
>>
>> I see a black screen with white letters "Scientific Linux 6."
>>
>> I've not tried start up options. No problem with this PC. I did have a
>> matlab issue using lots of cpu with java machine which is why I
>> rebooted, that was a minor irritant.
>>
>> Is the reboot hang related to the xorg update issue? As I can't access
>> this PC remotely (I can't ping it), any suggestions on how I fix this?
>
> This sounds like the problem I'm having with my laptop, which
> seems subtly different from the xorg issue.
> I can boot to runlevel 3 (or for me better level 1) as zxq9 describes,
> Pat's sugggestion of dropping " rhgb quiet" at the end of the boot
> command helps too, but I seem to get stuck when I bring the network
> up - NetworkManager is a suspect.

Can you boot to runlevel 1 or 2 and then try "ifup eth0" (or whatever 
your network interface is named)? Also, what graphics drivers are you 
using, the stock SL6 ones or vendor?

If you can boot to runlevel 1~3 but not 5 then the system is booting but 
something is tripping X up. Since this is not a kernel problem it 
wouldn't matter which one you picked as WL noted above. That doesn't 
necessarily mean its the same issue as the xorg update problem from last 
week, of course, but its likely.

That said, is upgrading to 6.2 an option? It seems to have swept this 
problem aside for many other folks (though sidestepping problems isn't 
as satisfying as fixing them, of course).