Just a heads-up: yesterday I found a bios version A05 for this board
that fixed the problem. on de US Dell ftp server ftp://ftp.us.dell.com/bios
Today it is gone again, and the buggy A04 is still there. The website
never mentioned A05.

Roelof

Roelof van der Kleij wrote:
> As a follow up for SL 5.1:
> I have an optiplex 755/2Gb/Ati radeonpci-e / latest bios (A04)
>
> I get a number of 'PCI: Cannot allocate resource region x'
> error messages. The system is slow. X works, but I cannot get the 
> accelerated proprietary ATI driver to work.
> Network does work out of the box. I have not tested sound.
>
> I have seen some similar problems with centos. All in all this rig 
> does not seem to work with SL. The wait is for a new kernel or maybe a 
> new bios.
> http://www.nvnews.net/vbulletin/showthread.php?t=100658
>
> IMHO the underlaying problem is that the RHEL philosophy of 
> backporting newer kernel features to an older kernel version cannot 
> keep up with the current frantic pace of hardware development. Maybe 
> fedora is the way to go for desktops?
>
> Roelof
>
>
> Jon Peatfield wrote:
>> On Tue, 11 Dec 2007, Mark Whidby wrote:
>>
>>> Hi,
>>> Has anyone had any experience of SL (or Centos / RHEL) on the new
>>> Dell Optiplex 755 machines? Specifically does X work?
>>
>> We got a 755 for testing a couple of days before I went on vacation 
>> (the last two weeks). In the short time I had to play with it I found 
>> that plain 5.0 PXE installation couldn't drive the new network 
>> hardware, but the kernel in 5.1alpha could. I assume that the one in 
>> 5.1beta/beta2/release will also drive the network stuff but I've not 
>> had time to check yet (still catching up on my e-mail).
>>
>> We *NEVER* have any luck with onboard Intel graphics so we stick to 
>> add-in cards. I like the ATI X300/X600 cards which Dell used to ship 
>> but sadly those are now hard to find. The newer X1050/X1300 (etc) 
>> cards will work with the VESA driver but then you get no fast 3D 
>> support... Of course using the ATI proprietry driver migth solve that 
>> if I could be bothered.
>>
>> [ Likewise every Nvidia card I seem to be able to buy seems now too 
>> new to get decent support from the Xorg driver. I dislike te 
>> proprietory drivers because updates to e.g. kernels are then less 
>> trivial... ]
>>
>> -- 
>> Jon Peatfield, Computer Officer, DAMTP, University of Cambridge
>> Mail: [log in to unmask] Web: http://www.damtp.cam.ac.uk/