I am loading a server from the CentOS 6.7 ISO and then upgrading.  After 
loading at release 6.7, the machine behaves normally.   After running yum 
update, the X server will not start.  Attempts to start it manually result in 
one of the following messages depending upon which OS is loaded.  I initially 
loaded it as 64 bit and when that did not work I tried the 32 bit version of 
the OS.  The graphics card is part of the motherboard so swapping it out is not 
an option.  This is a server and there is no AGP slot.  

X: symbol lookup error: /usr/lib64/xorg/modules/drivers/mach64_drv.so: 
undefined symbol: xf86LinearVidMem
X: symbol lookup error: /usr/lib/xorg/modules/drivers/mach64_drv.so: undefined 
symbol: xf86LinearVidMem

I yum grouperased the X Window System and Desktop and then groupinstalled it 
with no luck.  I then changed my repos to point to the original ISO, but there 
were too many dependencies broken to get the system to groupinstall the X 
Window System and desktop.  I tried forcing in just the driver, but it fails 
with a message about the driver being at a different release than the X server. 
 

I am planning to reload the OS and use the Yum Exclude to keep the Xorg pieces. 
 Unfortunately, that will probably break a lot of dependencies.

I downloaded the source for the driver from Xorg, but need to find a lot more 
stuff to get it to compile, and even then, it is likely not to work.

Does anyone have any more things to try?
Yes I know the mach64 is an old video card, but that is what is there.

Since CentOS just follows the upstream source, I am not sure where to file a 
bug.  Not that that is likely to help.  I am batting 0 for 5 over the last 
decade and a half getting anything fixed.

Bob Styma

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