Tod Morrison
Thomas Molina wrote:
>
> I have a problem with APM powering down my machine using shutdown -h
> now. My system is a TMC TI5VG+ with MVP3 (82C598AT chipset), AMD K6-2
> 35oMHz processor. OS is RedHat 5.2, kernel is 2.1.129 with ac3 patch
> from Alan Cox. The problem also appears with 2.1.125-2.1.129 as well as
> with 2.0.36. I'm cc'ing both linux kernel and linux-laptop lists,
> though I'm not subscribed to linux-laptop ( I can do so if needed to
> follow a discussion on this topic). Stephen Rothwell is listed as
> responsible for the APM code in the MAINTAINERS file; I hope that's
> correct.
>
> It's been suggested that it might be caused by a bad bios, having the
> bios shadowed, or because the bios expected to be in real mode when the
> kernel was in protected mode. It might be faulty bios code; I've sent
> an email to TMC asking for tech support on this issue. Of course
> Winblows handles the power down fine. I do not have the bios shadowed.
> The only shadowing is the video, but unshadowing that makes no
> difference. I don't fully grok the APM code, but my reading of the
> source indicates it is doing all the magic to switch into real mode
> before invoking the power down. At this point I'd appreciate any
> suggestions the readers might have.
>
> After doing shutdown -h now I get:
>
> system halted
> Power down.
>
> After that I get the following: (copied by hand - the gpf is followed
> by a kernel oops for unable to handle page fault. I didn't copy that
> down, although I could if necessary)
>
> general protection fault: f000
> CPU: 0
> EIP: 0050:[<0000898F>]
> EFLAGS: 00010047
> eax: 00005301 ebx: 00000001 ecx: 00000003 edx: 00000000
> esi: bfff82e6 edi: 080492e1 ebp: 67890000 esp: c19cbe38
> Process halt: (pid: 376, process nr: 15, Stackpage = c19cb000)
> Stack: 0000bfff be526789 0001c19c 00000000 00030000 53070000 00000000 00000000
> 82d50058 82aaff04 0000827d 00160000 004881e6 00000003 c0106335 00000010
> 00000018 00000018 00000000 bfffff04 080492e1 bffffdc4 bfffff04 00000286
> Call Trace: [<c0106336>] [<c0106378>] c0107179>] [<c011287f>] [<c01c2292>]
> [<c0141559>] [<c010e4cd>] [<c010e74c>] [<c010edff>] [<c0117bac>] [<c010fae7>]
> [<c01087f0>]
> Code: <1> Unable to handle kernel paging request at virtual address 0000898f
> current->tss.cr3 = 01953000, %cr3 = 019530000
> *pde = 00000000
>
> ksymoops output:
>
> Using `/boot/2.1.129b.map' to map addresses to symbols.
>
> >>EIP: 898f cannot be resolved
> Trace: c0106336 <apm_set_power_state+3e/70>
> Trace: c0106378 <apm_power_off+10/14>
> Trace: c011287f <sys_reboot+18b/20c>
> Trace: c01c2292 <tvecs+34a/69e8>
> Trace: c0141559 <ext2_follow_link+65/84>
> Trace: c010e4cd <send_sig_info+265/274>
> Trace: c010e74c <kill_something_info+f0/100>
> Trace: c010edff <sys_kill+4f/5c>
> Trace: c0117bac <handle_mm_fault+cc/16c>
> Trace: c010fae7 <schedule+1e3/20c>
> Trace: c01087f0 <system_call+34/38>
> Code:
>
> following is a relevant snip from bootup regarding APM:
>
> Nov 23 12:09:11 wr5z kernel: lp0: using parport0 (interrupt-driven).
> Nov 23 12:09:11 wr5z kernel: APM BIOS version 1.2 Flags 0x07 (Driver version
> 1.6)
> Nov 23 12:09:11 wr5z kernel: Entry f000:81c0 cseg16 f000 dseg fdfc cseg len
> e6ff, cseg16 len 16, dseg len 0
> Nov 23 12:09:11 wr5z kernel: Connection version 1.2
> Nov 23 12:09:11 wr5z kernel: AC on line, battery status unknown, battery
> life unknown
> Nov 23 12:09:11 wr5z kernel: battery flag 0x80, battery life unknown
> Nov 23 12:09:11 wr5z kernel: <Pro AudioSpectrum 16D rev 255> at 0x388 irq 10
> dma 3
>
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