Not sure if this is the correct subject line but my recently installed Centos build (Linux localhost.localdomain 3.10.0-229.14.1.el7.x86_64 #1 SMP Tue Sep 15 15:05:51 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux) periodically just freezes - completely locks up, no activity, nothing in the logs, just stops dead requiring a power off and reboot.
I've really looked around to try and find the _best_ way to set up debugging but there is a lot written about it from a lot of parties but I'm not sure who the definitive source is.
I did try booting with the 'CentOS Linux (3.10.0-229.14.1.el7.x86_64) 7 (Core) with debugging' option but that really didn't add anything to finding a solution. Dmesg did report this however:
dmesg|grep debug [ 0.000000] Command line: BOOT_IMAGE=/vmlinuz-3.10.0-229.14.1.el7.x86_64 root=UUID=1928d2da-784c-4b18-868c-f9858bceea6d ro crashkernel=auto rhgb quiet LANG=en_US.UTF-8 systemd.debug [ 0.000000] Kernel command line: BOOT_IMAGE=/vmlinuz-3.10.0-229.14.1.el7.x86_64 root=UUID=1928d2da-784c-4b18-868c-f9858bceea6d ro crashkernel=auto rhgb quiet LANG=en_US.UTF-8 systemd.debug [ 0.940176] ehci-pci 0000:00:12.2: debug port 1 [ 0.946472] ehci-pci 0000:00:13.2: debug port 1 [ 1.238335] systemd[1]: Unknown kernel switch systemd.debug. Ignoring. [ 5.083981] SELinux: initialized (dev debugfs, type debugfs), uses genfs_contexts [ 5.206423] systemd[1]: Unknown kernel switch systemd.debug. Ignoring.
Which I found interesting.
So, can anyone point me to a detailed guide to debugging what's going on with my build that will help me solve my locking problem? BTW, I think it might be my wireless Atheros equipped PCI card (dmesg|grep -i atheros [ 2.231264] ath5k: phy0: Atheros AR2414 chip found (MAC: 0x79, PHY: 0x45) but can't be sure because I've not any real proof that's the issue.
Thanks in advance for your patience and assistance.