mirror of https://github.com/torvalds/linux.git
59f4e7d572
I have a system (Biostar IDEQ210M mini-pc with a VIA chipset) which will not reboot unless a keyboard is plugged in to it. I have tried all combinations of the kernel "reboot=x,y" flags to no avail. Rebooting by any method will leave the system in a wedged state (at the "Restarting system" message). I finally tracked the problem down to the machine's refusal to fully reboot unless the keyboard controller status register had bit 2 set. This is the "System flag" which when set, indicates successful completion of the keyboard controller self-test (Basic Assurance Test, BAT). I suppose that something is trying to protect against sporadic reboots unless the keyboard controller is in a good state (a keyboard is present), but I need this machine to be headless. I found that setting the system flag (via the command byte) before giving the "pulse reset line" command will allow the reboot to proceed. The patch is simple, and I think it should be fine for everybody whether they have this type of machine or not. This affects the "hard" reboot (as done when the kernel boot flags "reboot=c,h" are used). Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org> |
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| mach-bigsmp | ||
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| mach-visws | ||
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| 8253pit.h | ||
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| acpi.h | ||
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| apic.h | ||
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| arch_hooks.h | ||
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| auxvec.h | ||
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| bug.h | ||
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| cpu.h | ||
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| current.h | ||
| debugreg.h | ||
| delay.h | ||
| desc.h | ||
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| dma.h | ||
| e820.h | ||
| elf.h | ||
| emergency-restart.h | ||
| errno.h | ||
| fcntl.h | ||
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| floppy.h | ||
| futex.h | ||
| genapic.h | ||
| hardirq.h | ||
| highmem.h | ||
| hpet.h | ||
| hw_irq.h | ||
| i387.h | ||
| i8253.h | ||
| i8259.h | ||
| ide.h | ||
| io.h | ||
| io_apic.h | ||
| ioctl.h | ||
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| ipc.h | ||
| ipcbuf.h | ||
| irq.h | ||
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| kdebug.h | ||
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| kmap_types.h | ||
| kprobes.h | ||
| ldt.h | ||
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| local.h | ||
| math_emu.h | ||
| mc146818rtc.h | ||
| mca.h | ||
| mca_dma.h | ||
| mman.h | ||
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