On 15/10/14, 8:22, Lamar Owen wrote:
First question: can you boot with the old kernel still (by default CentOS 6 leaves a few old kernels around; I want to say the default is 3, but it might be 5, I don't recall, and I don't have a straight default C6 install to check against right at the moment)?
Next question: did you also update the updated kernel-firmware package for the updated kernel?
The first thing I would do is downgrade the kernel and make sure the system is working there; you then will need to very carefully check all your hardware components together that the kernel update should be ok. You mention GPU's; which drivers are you using there? Iterate over all hardware.
Now, I'm going to sound like a broken record here. If you absolutely positively must stay at a point release for whatever reason (and there are valid reasons for this), then you don't need to be running CentOS; it is simply not supported. You either need to pay up for RHEL6 with EUS, or you need to install ScientificLinux 6 (built from the same sources that CentOS is built from, with a different rebranding); the SL team does support getting only critical updates but staying on a particular point release.
Upgrading to 6.5 did fix the problem, and did not (so far) seem to break my proprietary software.
For reference, I had already updated the kernel-firmware package (that happened automatically), and I could still boot the old kernel, which was how I got around to upgrading to 6.5.
More than anything, it's a little annoying that this is such an easy mistake to make, and so hard (it seems) to debug. But well, I won't be making it again.