Re: ACPI/ECDT on gateway 200x notebook

Casey Harkins
2004-01-04T02:07:26Z

I think its now been determined that the problem is not from a missing
ECDT. Check out the bugzilla entry where work is being done to solve this
problem. I'm hoping to test the patch on one of our 400VTX's this week.

http://bugzilla.kernel.org/show_bug.cgi?id=1744

-casey

On Sat, 3 Jan 2004, Rich Ibbotson wrote:
> Dear ACPI Gurus,
>
> I'm trying to get ACPI working on a Gateway 200X (200ARC) notebook
> running Linux with kernel 2.4.23 (built from sources). The specs for
> this notebook claim that it has APM 1.2 and ACPI 2.0 support. However,
> when I run a kernel with ACPI enabled (as a module) the
> /proc/acpi/battery and /proc/acpi/ac_adapter directories are both empty
> and I see these messages at boot time:
>
> kernel: ACPI-1120: *** Error: Method execution failed
> [\_SB_.ADP1._STA] (Node c12f88c0), AE_AML_NO_RETURN_VALUE
> kernel: ACPI-1120: *** Error: Method execution failed
> [\_SB_.BAT1._STA] (Node c12f89c0), AE_AML_NO_RETURN_VALUE
>
> I see that this has been discussed here before, and it looks like the
> consensus is that I need to manually install an ECDT at boot time.
>
> The latest discussions of this problem that I've seen are here:
> http://sourceforge.net/mailarchive/forum.php?thread_id=3451648&forum_id=6102
> http://sourceforge.net/mailarchive/forum.php?thread_id=3479606&forum_id=6102
>
> After reading those threads, I've tried two things to get ACPI working:
>
> 1) Patch the latest 2.4.23 kernel sources with acpi-20031203-2.4.23.diff
> and the "fake_ecdt" patch from Ducrot Bruno, passing the string
> "ecdt_fake=0x66:0x62:28:1:\\_SB_.PCI0.LPCB.H_EC" to the kernel at boot
> time (my _GPE is 0x1c and the _UID reported by acpidmp under Device H_EC
> is 0x01)
>
> I see that the fake ecdt does not work, but I am not sure why. I see
> nothing between the following two logs:
>
> kernel: ACPI: Faking ECDT
> kernel: ACPI: Could not use ECDT
>
> If I specify the path as "\_SB_.PCI0.LPCB.H_EC" (only one "\") in my
> grub.conf, I see the following:
>
> kernel: ACPI: Faking ECDT
> kernel: evregion-0347: *** Error: Handler for [EmbeddedControl]
> returned AE_BAD_PARAMETER
> kernel: dswexec-0435 [11] ds_exec_end_op : [Store]: Could not
> resolve operands, AE_BAD_PARAMETER
> kernel: psparse-1120: *** Error: Method execution failed
> [\_SB_.PCI0.LPCB.H_EC._REG] (Node c13f6c68), AE_BAD_PARAMETER
> kernel: ACPI: Could not use ECDT
>
> I do see an entry for "\_SB_.PCI0.LPCB.H_EC._REG" in the DSDT, though:
>
> 000028c5: Method _REG (\_SB_.PCI0.LPCB.H_EC._REG)
> 000028cb: ArgCount 2; NotSerialized
> 000028cc: If
> 000028ce: LAnd
> 000028cf: LEqual
> 000028d0: Arg0
> 000028d1: 0x03
> 000028d3: LEqual
> 000028d4: Arg1
> 000028d5: 0x01
> 000028d7: Store
> 000028d8: 0x01
> 000028da: ECON (0000024e)
> 000028de: Store
> 000028df: \_SB_.PCI0.LPCB.H_EC.ACEX (00002844)
> 000028f6: \PWRS (00000160)
>
> I'm not sure if this means that it got a little further, or if this is
> an error because I should have used both backslashes.
>
> 2) I would like to try actually supplying an ECDT, using the information
> below (I got much of this from the DSDT, but I'm not sure if the Creator
> ID/Creator Revision matter). Is there a suggested way to put this into
> a char[] or some form that can be used in acpi_os_table_override? If I
> can get it into a char[] then I guess I can calculate the checksum and
> length, but if not then how do I compute these?
>
> ECDT: Length=?, Revision=1, Checksum=?,
> OEMID=INTEL, OEM Table ID=MONTARAG, OEM Revision=0x06040000,
> Creator ID=fake, Creator Revision=0x1
> EC_CONTROL=0x66:0[8] (IO)
> EC_DATA=0x62:0[8] (IO)
> UID=1, GPE_BIT=0x1c
> EC_ID=\_SB_.PCI0.LPCB.H_EC
>
>
> thanks for any advice,
> Rich
>
>
>
>
>
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