Messages in this thread | | | Date | Sun, 26 Apr 2009 11:51:21 +0200 | From | Martin Mueller <> | Subject | Kernel locks up when idle on VIA-nano U2300 with VIA VX800 on Jetway JNF76-N1GL-LF mainboard |
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Hi all,
last Thursday my mini-ITX board in my home-server died and I had to get a replacement board. I got an fanless Jetway JNF76-N1GL-LF from a local Dealer. The board uses a 1GHz U2300 VIA-nano CPU[1] and an VIA VX800 chipset. After replacing the board, the adventure actually started:
Booting my installed debian with kernel 2.6.29-1-686 (debian kernel) failed. The system just hang when detecting the harddisks during the boot process, no oops, no messages, just no reaction any more.
Fortunatelly I had an old 2.6.23-1-686 (debian kernel) still hanging around in the grub menu. This kernel works flawlessly on the board (aside from not recognizing the VIA HD-audio, which doesn't bother me at the moment).
Next, I downloaded linux-2.6.30-rc3, compiled a minimal version with just initrd. I left out PCI-support, ACPI and almost everything else menuconfig allowed me to unselect except the VGA text console. This kernel locked up after giving me the initial prompt from busybox in the initrd.
When adding the following lines in the script executed by the kernel after booting in the initrd, the system actually works:
while true; do true; done & /bin/sh
As soon as I kill the shell loop, the system freezes again.
So my conclusion is: the kernel locks up the first time the CPU is idle.
Any hints on how to proceed from here?
Thanks.
bye MM
[1] cato:~# cat /proc/cpuinfo processor : 0 vendor_id : CentaurHauls cpu family : 6 model : 15 model name : VIA Nano processor U2300@1000MHz stepping : 2 cpu MHz : 997.535 cache size : 1024 KB fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 10 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat clflush acpi mmx fxsr sse sse2 ss tm syscall nx fxsr_opt rdtscp lm up pni monitor vmx est tm2 ssse3 cx16 xtpr rng rng_en ace ace_en ace2 phe phe_en lahf_lm bogomips : 1996.78 clflush size : 64
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