On Aug 2, 2012, at 11:58 AM, Randall Devol wrote:

> On Aug 2, 2012, at 11:06 AM, Pat Riehecky wrote:
> 
>> On 08/02/2012 11:55 AM, Mark Stodola wrote:
>>> On 08/02/2012 11:37 AM, Randall Devol wrote:
>>>> I posted this issue first to
>>>> http://scientificlinuxforum.org/index.php?act=ST&f=16&t=1803
>>>> <http://scientificlinuxforum.org/index.php?act=ST&f=16&t=1803>. On the
>>>> forum, tux99 suggested I report this on the devel mail list.
>>>> 
>>>> After upgrading from SL 6.0 to SL 6.2, system startup appears to hang
>>>> when it tries to start run level 5. Parallels is still able to cleanly
>>>> shut down the guest OS and booting into single user works as expected.
>>>> 
>>>> After booting into single users, in the /var/log/Xorg.0.log file, I see
>>>> that the Parallels video driver "prlvideo" cannot load because it
>>>> includes an undefined symbol: "miEmptyData". The Parallels mouse driver
>>>> cannot load because of the undefined symbol: "dixScreenOrigins".
>>>> 
>>>> Then Xorg aborts because it cannot find any screens.
>>>> 
>>>> CentOS release 6.3 with the same version of the kernel
>>>> (2.6.32-279.el6.i686 #1) and the same version of Xorg-server
>>>> (1.10.6.1.el6.centos) as SL 6.2 runs normally under Parallels.
>>>> 
>>>> This seems like a bug in SL to me.
>>>> 
>>>> -=O=- Randy Devol
>>>> [log in to unmask] <mailto:[log in to unmask]>
>>>> Cell: 408-483-3627
>>>> Fax: 650-390-0818
>>>> 
>>>> 
>>> 
>>> There seems to be a lot of comparison between SL 6.2 and CentOS 6.3 flying around today.  Not very apples to apples so to speak.  I'm also guessing that your SL 6.0 to 6.2 was updated via yum and not a fresh installation and that the CentOS was.  A week or so ago, there were numerous packages for the X drivers that were pushed out to accommodate a change in the Xorg API between minor revisions by TUV.  This sounds an awful lot like the cause of your trouble.  Was the 'prlvideo' driver package updated when you went to 6.2?  You might want to jump back a bit in the mailing list archives to find the proper way to make sure yum grabs the correct packages.  You could also try SL 6.3rc1 to see if the problem persists there.
>>> 
>>> -Mark
>>> 
>> 
>> Echoing Mark's comments.
>> 
>> I also have a set of questions, but I'll start with: where is prlvideo coming from?
>> 
>> -- 
>> Pat Riehecky
>> Scientific Linux Developer
> 
> From Parallels, of course. :-)
> 
> Mark, you are correct about how CentOS and SL were installed differently so I am trying a clean install of SL 6.2.  I'll let the list know how it goes when it is done.  (slow connection here)
> 
> -=O=- Randy


Well, a fresh install of SL 6.2, after installing all pending updates (including the bothersome kernel 2.6.32-279.1.1.el6 and xorg-server runs fine under Parallels.  The module prlvideo loads without error.  Everyone can stand down. :-\

I am sure I followed the update/upgrade instructions on http://www.scientificlinux.org/documentation/howto/upgrade.6x.  Are there better instructions somewhere else I should follow instead?

-=O=- Randy