dogbertwrldrulr wrote:By a clean install I mean that we re-installed the OS from scratch. The install does automate our security lockdown on the system as well.
Security lockdown? Err.. what does it do? Maybe some SELinux permissions need to be set up?
dogbertwrldrulr wrote:Other things we have noted that are different with this configuration are that both computers have an audio port on the video card (nVidia GTS450), but the old configuration (the one that works) doesnt have anything installed for it (lspci has it as an unknown device). The new configuration does have something installed for that device. We have yet to find a way to disable this device anywhere in CentOS.
Hmmm.. the unknown device list in lspci got to do more with its pci id list than with what linux recognizes, so I suspect it's not a real difference. However, you could try booting to single user mode (add "single" to the boot loaders' command line), and testing there ('sudo modprobe -r nvidia nvidia_fb' if they are still present to be sure).
a kind of fundamentalist "security"...
If your user is not part of the audio group, add your user by:
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# gpasswd -a username audio
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$ man gpasswd
cesium wrote:Maybe some SELinux permissions need to be set up?
1. If it works with Arch LiveCD and does not work with CentOS, it might be a security problem, or else.
2. If the card is broken, it may not work with any LiveCD and any sound system.
3. If it is not clear whether the card is broken or not, it does not make much sense to consider any assumptions about "SELinux permissions" and any other mythology about "video cards", "hardware", and "mysterious CentOS problems".
4. In any case, it might be reasonable to create a special subforum for CentOS users and let them help each other to fix security settings and other exotic problems.