On Sat, 23 Feb 2013, zxq9 wrote:

> On 02/23/2013 01:24 AM, Mark Stodola wrote:
>> On 02/22/2013 10:14 AM, Eva Myers wrote:
>>> On Fri, Feb 22, 2013 at 09:40:23AM -0600, Mark Stodola wrote:
>>>> On 02/22/2013 04:53 AM, Eva Myers wrote:
>>>>> I have a problem with the new Firefox 17 on SL5 machines with ATI
>>>>> Radeon X300 graphics cards using the fglrx driver. The X server will
>>>>> frequently crash when a user attempts to start Firefox, leaving the
>>>>> computer with its screen black and unresponsive to mouse or keyboard
>>>>> (the Xorg process just sits there eating CPU). Does anyone know a fix
>>>>> for this problem?
>>>>> Eva.
>>>> 
>>>> This sounds more like a problem with fglrx, are you using the one from
>>>> ELrepo? I'm still on FF 10ESR here, but under Options/Preferences (they
>>>> keep changing it I swear!), in the advanced section, general tab, you
>>>> can uncheck hardware acceleration. See if that alleviates the problem.
>>>> It may be useful to check your Xorg log files for clues as well.

This firefox problem sounds familiar to me. I saw it with SL 5, Firefox 10ESR 
64bits, and fglrx from ELrepo frequently. Replacing Firefox 64bits with 
Firefox 32bits helped in my case.
But in rare cases, Thunderbird 10ESR 64bit causes fglrx to crash as well.

Best regards,
   Andreas