Hello, I've got an EPIA-M series motherboard in a system that has locked up twice under random conditions. Nothing is logged to the console or logs, the system just hangs. The system is installed with CentOS 4.4 and running the 2.6.9-42.0.8.EL i686 kernel. I am aware that older C3 processors had the CMOV problem, but that is resolved in the later boards (procinfo below). I've seen a few posts about similar problems, but it's not clear whether this is a bad board, or if there's an issue with the kernel. cpuspeed was running, I've since disabled and stopped the service as it's been rumored to cause problems. This was mentioned in this bug report that is still open : http://bugs.centos.org/view.php?id=1270 Can anyone confirm that there are no known problems with the VIA C3 Nehemiah Model 9 and CentOS, or if some (kernel) tweaks are required to make these systems stable? Regards, Chris Board Info : http://www.via.com.tw/en/products/mainboards/motherboards.jsp?motherboard_id=81 # cat /proc/cpuinfo processor : 0 vendor_id : CentaurHauls cpu family : 6 model : 9 model name : VIA Nehemiah stepping : 8 cpu MHz : 534.860 cache size : 64 KB fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 1 wp : yes flags : fpu vme de pse tsc msr cx8 mtrr pge cmov pat mmx fxsr sse rng rng_en ace ace_en bogomips : 1070.44 # lspci 00:00.0 Host bridge: VIA Technologies, Inc. VT8623 [Apollo CLE266] 00:01.0 PCI bridge: VIA Technologies, Inc. VT8633 [Apollo Pro266 AGP] 00:0f.0 Ethernet controller: VIA Technologies, Inc. VT6105 [Rhine-III] (rev 8b) 00:10.0 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 80) 00:10.1 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 80) 00:10.2 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 80) 00:10.3 USB Controller: VIA Technologies, Inc. USB 2.0 (rev 82) 00:11.0 ISA bridge: VIA Technologies, Inc. VT8235 ISA Bridge 00:11.1 IDE interface: VIA Technologies, Inc. VT82C586A/B/VT82C686/A/B/VT823x/A/C PIPC Bus Master IDE (rev 06) 00:12.0 Ethernet controller: VIA Technologies, Inc. VT6102 [Rhine-II] (rev 74) 01:00.0 VGA compatible controller: VIA Technologies, Inc. VT8623 [Apollo CLE266] integrated CastleRock graphics (rev 03)