Re: ACPI Regression in -CURRENT?

On Wed, Jun 11, 2003 at 08:18:26PM +0200, Harald Hanche-Olsen wrote:
> + Stijn Hoop <stijn_at_win.tue.nl>:
> 
> | Hi Thorsten,
> | 
> | On Tue, Jun 10, 2003 at 03:42:18PM +0200, Thorsten Greiner wrote:
> | > some time ago several people (including me) reported ACPI related problems
> | > on various Dell laptops resulting in error messages of the form
> | > 
> | >         ACPI-0293: *** Warning: Buffer created with zero length in AML
> | > 
> | > During the 5.1 release process these problems have been temporarily fixed.
> | 
> | This is due to the Dell laptops having an invalid ACPI table in the BIOS.
> | The only way to avoid these messages is to tell FreeBSD ACPI to override
> | the vendor supplied table with a correct one.
> | 
> | Mark Santcroos developed a patch which worked on his C640 and my Inspiron
> | 4150, which you can find attached. Here are the steps to use it: [...]
> 
> I tried that on my Inspiron 4150 with 5.1-RELEASE.  The patch failed,
> but only for trivial reasons like different placment of braces.

Note that you have to patch the output of iasl -d, *NOT* the .asl file
that acpidump generates. There is a difference although they look alike.

Don't ask me what the meaning of all this is, I'm just the messenger :)

> So I applied it by hand and followed directions, but the warning messages
> did not go away.  I know my efforts did *something* though, as I find
> this in dmesg output:
> 
> Preloaded acpi_dsdt "/boot/acpi_dsdt.aml" at 0xc055c1cc.
> [...]
> ACPI: DSDT was overridden.
>     ACPI-0375: *** Info: Table [DSDT] replaced by host OS

That's ok, but I think you patched & compiled the wrong file.
I *know* it works because I also have an Inspiron 4150.

> Also, I still cannot suspend the machine: acpiconf -s <number> results
> in a variety of interesting behaviour, always ending with the machine
> in a useless state (except acpiconf -s 5, which does what it should -
> like halt -p).

acpiconf -s 4 works, now that I have reinstalled the laptop with a suspend
partition as the first primary partition. You need the Dell utility mks2d.exe
for this, available somewhere on the Dell website.

> Actually, acpiconf -s 3 seems to "almost" work: The
> screen goes blank, and the machine turns itself off - only to turn
> back on immediately, but with the screen remaining blank.  So I hit
> Fn-F8 a couple of times, and lo and behold the screen is alive again
> and the machine is responsive once more.  I did this from a console,
> but when I do Ctrl-Alt-F9 the X server is hosed: Wrong colours,
> garbage in the top of the screen, and zero response to any
> keypresses.

According to Mark, this actually should work from within X -- something
to do with DPMS. I haven't gotten around to testing it after my reinstall
though (*cough*Zelda:WW*cough* :)

> Can you suspend yours?  Any more clever tricks?  (Hmm, I suppose we
> should discuss this on -mobile, but since the thread started here...)

The ACPI thing got more coverage on -current, but the suspend stuff is
probably -mobile topic, yeah :)

HTH,

--Stijn

-- 
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