current ACPI status in 2.6.7 kernel

DISCUSSION Alexander Sirotkin 8 participants 13 messages Aug 10, 2004 – Aug 12, 2004 8 messages not in the archive ACPI

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Alexander Sirotkin

author

2004-08-10 08:05 UTC #0 lore raw

Hello.

I could not find this information in neither mailing list archive nor the web site. What is the current status of ACPI ? I'm mainly interested in one simple question - does suspend work ? If so, how stable it is.

Thanks.

Suggestion - put current status message on the web site.

Signature · 18 lines

Alexander Sirotkin
SW Engineer

Texas Instruments
Broadband Communications Israel (BCIL)
Tel:  +972-9-9706587
________________________________________________________________________
"Those who do not understand Unix are condemned to reinvent it, poorly."
     -- Henry Spencer 




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Nigel Cunningham

2004-08-10 10:02 UTC #2 lore raw

Hi Alexander.

Quoted 7 lines · Alexander Sirotkin

Hello.
I could not find this information in neither mailing list archive nor the web site.
What is the current status of ACPI ? I'm mainly interested in one simple question -
does suspend work ? If so, how stable it is.

Are you meaning suspend to ram, or to disk?

Regards,

Nigel

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Alexander Sirotkin

author

2004-08-10 13:56 UTC #4 lore raw

Suspend to RAM, mostly...

Quoted 21 lines · Nigel Cunningham

Hi Alexander.
Quoted 7 lines · Alexander Sirotkin
Hello.
I could not find this information in neither mailing list archive nor the web site. What is the current status of ACPI ? I'm mainly interested in one simple question - does suspend work ? If so, how stable it is.
Are you meaning suspend to ram, or to disk?
Regards,
Nigel

Signature · 9 lines

Alexander Sirotkin
SW Engineer

Texas Instruments
Broadband Communications Israel (BCIL)
Tel:  +972-9-9706587
________________________________________________________________________
"Those who do not understand Unix are condemned to reinvent it, poorly."
     -- Henry Spencer

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Nathan Bryant

2004-08-10 16:34 UTC #6 lore raw

Quoted 3 lines · Alexander Sirotkin

Quoted 3 lines
Quoted 3 lines
I could not find this information in neither mailing list archive nor the web site. What is the current status of ACPI ? I'm mainly interested in one simple question - does suspend work ? If so, how stable it is.

Don't try it if you use any SCSI disks. IDE should be OK.

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Nathan Bryant

2004-08-10 17:13 UTC #8 lore raw

Quoted 8 lines · Nathan Bryant

Quoted 3 lines · Alexander Sirotkin
Quoted 3 lines
Quoted 3 lines
I could not find this information in neither mailing list archive nor the web site. What is the current status of ACPI ? I'm mainly interested in one simple question - does suspend work ? If so, how stable it is.
Don't try it if you use any SCSI disks. IDE should be OK.

Oh, and add many SATA adapters to that list. I think SATA is based on the SCSI midlayer.

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Alexander Sirotkin

author

2004-08-11 07:48 UTC #10 lore raw

Quoted 10 lines · Nathan Bryant

Quoted 8 lines · Nathan Bryant
Quoted 4 lines · Alexander Sirotkin
Quoted 4 lines
Quoted 3 lines
I could not find this information in neither mailing list archive nor the web site. What is the current status of ACPI ? I'm mainly interested in one simple question - does suspend work ? If so, how stable it is.

Quoted 4 lines

Quoted 1 line
Don't try it if you use any SCSI disks. IDE should be OK.
Oh, and add many SATA adapters to that list. I think SATA is based on the SCSI midlayer.

Thanks for the tip, fortunately I don't have any SCSI or SATA disks. Unfortunately, I still don't know how to do this. Is there an utility to put PC into sleep/suspend ? I know I can switch to various S modes using /proc entry, but what about all the peripherals and user mode apps ? I would venture that there has to be some kind of subsystem in user mode to take care of all this. I probably did not phrase my question right, but when I Asked if ACPI suspend/sleep status is stable enough I was actually referring to the whole subsystem, not just kernel support.

Thanks a lot.

Signature · 18 lines

Alexander Sirotkin
SW Engineer

Texas Instruments
Broadband Communications Israel (BCIL)
Tel:  +972-9-9706587
________________________________________________________________________
"Those who do not understand Unix are condemned to reinvent it, poorly."
     -- Henry Spencer 




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Nathan Bryant

2004-08-11 13:19 UTC #12 lore raw

Quoted 8 lines

Thanks for the tip, fortunately I don't have any SCSI or SATA disks. Unfortunately, I still don't know how to do this. Is there an utility to put PC into sleep/suspend ? I know I can switch to various S modes using /proc entry, but what about all the peripherals and user mode apps ? I would venture that there has to be some kind of subsystem in user mode to take care of all this. I probably did not phrase my question right, but when I Asked if ACPI suspend/sleep status is stable enough I was actually referring to the whole subsystem, not just kernel support.

It's not that big of a deal for userspace, you just need scripts to unload any problem device drives before suspend and reload them after resume. You would also need to kill and restart any programs that will be broken by those devices going away. APM already has config files that specify a lot of this which could probably be adapted to ACPI. But the ultimate goal is to get devices that don't even need to be unloaded, since we now have proper suspend/resume hooks. ;)

I think there is a "pmsuspend" program floating around out there, don't know how well it has been integrated with existing suspend/resume scripts though. Otherwise you can just talk to the kernel directly...

Nathan

Oh, and there's that annoying little problem where acpid sees the button press that I have to use to resume, as a shutdown event...

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Bernard Blackham

2004-08-11 13:56 UTC #14 lore raw

Quoted 10 lines · Nathan Bryant

Quoted 9 lines
know how to do this. Is there an utility to put PC into sleep/suspend ? I know I can switch to various S modes using /proc entry, but what about all the peripherals and user mode apps ?
I would venture that there has to be some kind of subsystem in user mode to take care of all this. I probably did not phrase my question right, but when I Asked if ACPI suspend/sleep status is stable enough I was actually referring to the whole subsystem, not just kernel support.

Quoted 7 lines

It's not that big of a deal for userspace, you just need scripts to unload any problem device drives before suspend and reload them after resume. You would also need to kill and restart any programs that will be broken by those devices going away. APM already has config files that specify a lot of this which could probably be adapted to ACPI. But the ultimate goal is to get devices that don't even need to be unloaded, since we now have proper suspend/resume hooks. ;)

For Software Suspend 2, I've written a package called hibernate which can be used to activate Software Suspend 2, or alternately utilise the /sys/power/state interface. (It doesn't manipulate /proc/acpi/sleep, as I was under an impression it was getting deprecated - on the other hand if it isn't, writing a plugin to do so isn't hard).

http://developer.berlios.de/project/showfiles.php?group_id=1412
under "Current Scripts".

Quoted 3 lines

I think there is a "pmsuspend" program floating around out there, don't know how well it has been integrated with existing suspend/resume scripts though.

Seems a Mandrake thing, but covers much the same ground as hibernate. hibernate tries to cover most distributions.

Quoted 2 lines

Oh, and there's that annoying little problem where acpid sees the button press that I have to use to resume, as a shutdown event...

Does "rmmod button" just before suspending help?

Bernard.

Signature · 8 lines

 Bernard Blackham <bernard at blackham dot com dot au>


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Herman Sheremetyev

2004-08-11 14:10 UTC #15 lore raw

In reply to a message not in the archive

On Wed, 2004-08-11 at 09:19, Nathan Bryant wrote:
<snip>

Quoted 2 lines

Oh, and there's that annoying little problem where acpid sees the button press that I have to use to resume, as a shutdown event...

</snip>

I don't have this issue myself since hitting any button on my laptop wakes it up but I think it would be possible to get around this problem by putting something like this into your acpid script that handles the button press:

if test ! -e /tmp/button_lock
then
/sbin/shutdown
fi

Then in your suspend script add:

touch /tmp/button_lock
echo -n mem > /sys/power/state
rm /tmp/button_lock

It would need to be tweaked a bit since the rm may get executed before the suspend completes and maybe acpid will get the button event some time after resume so there might need to be a sleep statement but in general I think it would solve the problem.

-Herman

Nathan Bryant

2004-08-11 14:35 UTC #16 lore raw

In reply to a message not in the archive

Quoted 9 lines · Nathan Bryant

Quoted 3 lines · Alexander Sirotkin
Quoted 3 lines
Quoted 3 lines
I could not find this information in neither mailing list archive nor the web site. What is the current status of ACPI ? I'm mainly interested in one simple question - does suspend work ? If so, how stable it is.
Don't try it if you use any SCSI disks. IDE should be OK.

I've just fixed S3 suspend for SCSI disks. See http://marc.theaimsgroup.com/?l=linux-scsi&m=109218292625235&w=2

Nathan

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Len Brown

2004-08-12 03:48 UTC #18 lore raw

Alexander,
The status of ACPI S3 suspend/resume in 2.6.7 is...

Run the latest ACPI patch on top of 2.6.7 (indeed, you still need the latest patch for 2.6.8)

build EHCI as a module, and unload it first

echo 3 >/proc/acpi/sleep

(yes, it is on the list to move to sysfs...)

some systems get a double event if wakeup with power button. I use the LID to wake up my system and that works fine.

many systems come back up from S3, but don't re-enable the LCD, or some re-enable it, but in the wrong mode. Sometimes you can wake it up by running X. Sometiems you can wake it up by switching
virtual consoles.
There is a lot of experimentation in this area, but we don't really have fixes for this yet that are universally positive -- ie fix platforms w/o breaking others.

in summary, YMMV;-)

cheers,
-Len

Karol Kozimor

2004-08-12 07:48 UTC #19 lore raw

Thus wrote Len Brown:

Quoted 2 lines

some systems get a double event if wakeup with power button. I use the LID to wake up my system and that works fine.

Note I do get a spurious PWRF event even when waking with the keyboard. Best regards,

Signature · 9 lines

Karol 'sziwan' Kozimor
sziwan-DETuoxkZsSqrDJvtcaxF/[email protected]


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Ow Mun Heng

2004-08-12 20:34 UTC #20 lore raw

In reply to Len Brown

Quoted 12 lines · Len Brown

Alexander,
The status of ACPI S3 suspend/resume in 2.6.7 is...
Run the latest ACPI patch on top of 2.6.7 (indeed, you still need the latest patch for 2.6.8)
build EHCI as a module, and unload it first
echo 3 >/proc/acpi/sleep
(yes, it is on the list to move to sysfs...)

Here's a top Snipped portion of my acpid handle.pl script. Notice It's on S4?

Unload all the USB modules/ network and stops MySql.

S4 works. S3 No. Screen does not come back. POST issue I guess.

Have not experimented with S3_bios

D600 Radeon 9000

#! /usr/bin/perl -w

use strict;

        my $first_arg = shift (@ARGV);

        if ($first_arg =~ /^button\/lid$/) {
                system ('/usr/X11R6/bin/xset -display :0 dpms force off');
        }

        if ($first_arg =~ /^button\/sleep$/) {
                shift (@ARGV);
                shift (@ARGV);
                if (check_ignore ('/etc/acpi/flags/suspend')) {
                        clear_ignore ('/etc/acpi/flags/suspend');
                } else {
                        set_ignore ('/etc/acpi/flags/suspend');
                        system ('/usr/X11R6/bin/xset -display :0 dpms force off');
                        system ('rmmod tg3');
                        system ('rmmod usb_storage usbhid uhci_hcd ehci_hcd');
                        system ('/sbin/service mysqld stop');
                        system ('echo 4 > /proc/acpi/sleep && hwclock --hctosys');
                        system ('echo "Resuming proceses....');
                        system ('modprobe tg3');
                        system ('modprobe usb_storage');
                        system ('modprobe ehci_hcd');
                        system ('modprobe uhci_hcd');
                        system ('modprobe usbhid');
                        system ('/sbin/service mysqld start');
                        }

Quoted 29 lines

some systems get a double event if wakeup with power button. I use the LID to wake up my system and that works fine.
many systems come back up from S3, but don't re-enable the LCD, or some re-enable it, but in the wrong mode. Sometimes you can wake it up by running X. Sometiems you can wake it up by switching
virtual consoles.
There is a lot of experimentation in this area, but we don't really have fixes for this yet that are universally positive -- ie fix platforms w/o breaking others.
in summary, YMMV;-)
cheers,
-Len
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_______________________________________________
Acpi-devel mailing list [email protected]
https://lists.sourceforge.net/lists/listinfo/acpi-devel

Signature · 11 lines

Ow Mun Heng
Fedora GNU/Linux Core 2 on D600 1.4Ghz CPU kernel
2.6.7-2.jul1-interactive 
Neuromancer 04:32:53 up 4:34, 4 users, load average: 0.61, 0.54, 0.37 


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