Re: suspend/resume on T41p broken (again)

From: Jeff Roberson (jroberson_at_chesapeake.net)
Date: 06/08/05

  • Next message: Raphael H. Becker: "Re: Accessing SCSI-Devices >2TB" 
    Date: Wed, 8 Jun 2005 10:00:01 -0400 (EDT)
To: Poul-Henning Kamp <phk@phk.freebsd.dk>

    On Wed, 8 Jun 2005, Poul-Henning Kamp wrote:

    >
    > I just tried updating to -current and found that suspend/resume
    > on my T41p was broken (again).
    >

    Just about every acpi feature is broken on my T42p. I've tracked it down
    to writing to IO port 178, which we do on reset, suspend/resume, and
    switching to an external monitor. This port comes from
    "AcpiGbl_FADT->SmiCmd" which I believe the hardware tells us about.
    However, I see no successful writes to this port without hanging the
    machine. Also, suspiciously, acpi uses many other ports, none of which
    have a value close to 178. Most are near 4096. Does anyone know how to
    debug this further?

    > I hacked up a laserprinter as console and the last thing I see
    > is:
    >
    > [...]
    > vga0: saving 68 bytes of video state
    > pci0:29:7: Transition from D0 to D3
    > ======= acpi_printcpu() debug dump ========
    > gdt [0097:c0769280] idt [07ff:c0769660] ldt [0050] tr [0048] efl[00080082]
    > eax [00000001] ebx [c1a72180] ecx [00000001] edx [00000004]
    > esi [00000000] edi [00000003] ebp [d4447bf4] esp[d4447bd8]
    > cr0 [8005003b] cr2 [08069080] cr3 [00c1e000] cr4[00000691]
    > cs[0020] ds[0028] es[0028] fs[0008] gs[003b] ss[0028]
    >
    > I belive this comes from the suspend side. The next thing I have
    > is the copyright message from the subsequent reboot.
    >
    > --
    > Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
    > phk@FreeBSD.ORG | TCP/IP since RFC 956
    > FreeBSD committer | BSD since 4.3-tahoe
    > Never attribute to malice what can adequately be explained by incompetence.
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