ACPI suspend weirdness on Dell Inspiron 2650
Quoted 8 lines · Luke Hammer
Hi,
I've finallyjust managed to get some kind of suspend state working on my Dell Inspiron 2650 laptop, using the 2.4.21-pre3 kernel and the ACPI-20030125-2.4.21-pre3 patch (under RedHat 7.3). I can get some kind of suspend state working using 'echo 1
Quoted 1 line
/proc/acpi/sleep'but I don't think it's the genuine suspend-to-RAM state. For one
You're right.
Quoted 8 lines
Nothing at all seems to happen if I try to echo 3, 4, 4b or 5 to
/proc/acpi/sleep,
which is strange since the ChangeLog for the latest ACPI patch mentions being able to change settings for the S3 suspend, and it also claims to incorporate the s4bios patch. If I cat/proc/acpi/sleepI get "S0 S1 S3 S4 S5", so
I'm not sure if I'm doing something wrong, or if ACPI suspend-to-RAM support isn't fully functional yet.
Suspend-to-RAM is S3 as far as I know and someone posted here that it'll probably no be working on 2.4 that soon. Rather try kernel 2.5.x for this.
Jean-Pierre
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Quoted 7 lines · Luke Hammer
Hi,
I've finallyjust managed to get some kind of suspend state working on my Dell Inspiron 2650 laptop, using the 2.4.21-pre3 kernel and the ACPI-20030125-2.4.21-pre3 patch (under RedHat 7.3). I can get some kind of suspend state working using 'echo 1 >/proc/acpi/sleep' but I don't think it's the genuine suspend-to-RAM state. For one
Correct. It is 'system standby'.
Quoted 5 lines
thing, as soon as I put it into this state, one of the fans comes on and stays on (not very good when you're trying to conserve battery juice, but this is probably a Dell BIOS problem); and secondly, the screen doesn't actually seem to be turned off - I can still make out an image on it,
How? Could you explain ? If yes, then there is a problem. The processor is supposed to have stopped execution.
Quoted 1 line
it just looks like the backlighting has been turned off.
It sound like, but definitely you should some power saving in this state. It is not the best, though, and S3 is really preferable.
Quoted 3 lines
Nothing at all seems to happen if I try to echo 3, 4, 4b or 5 to
/proc/acpi/sleep,
'3' is disabled explicitely. It is in active developpement in 2.5. '4' is not supported. Actually it is defaulted to '4b'.
You have to get swsusp (or a 2.5 tree) to get it.
'4b' is still under developpement for 2.4. For example, nothing is
done yet to restore a fbconsole (especially the svga one). It is certainly not SMP safe, not to mention that it can not be preempted.
Quoted 2 lines
which is strange since the ChangeLog for the latest ACPI patch mentions being able to change settings for the S3 suspend,
Actually this is only for 2.5. Perhaps a miss here (I have not read carrefully the ChangeLog, sorry)
Quoted 2 lines
and it also claims to
incorporate the s4bios patch. If I cat/proc/acpi/sleepI get "S0 S1 S3
But only for 2.4.
Quoted 1 line
S4 S5", so
You should have 'S4bios' if you cat /proc/acpi/sleep. It is somehow different from S4. Remember, S4bios
work _only_ if your bios support it. If not, I can not do so much for you. Please note also that S4bios is _not_ apm suspend-to-disk, so your laptop can support the apm one, but not S4bios (even though it sound like strange in my point of view)...
Quoted 2 lines
I'm not sure if I'm doing something wrong, or if ACPI suspend-to-RAM support isn't fully functional yet.
S3 would not backported to 2.4. I don't say this is not possible, though, but sound like nobody will try to go for 2.4.
Cheers,
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Hi,
I've finallyjust managed to get some kind of suspend state working on my Dell Inspiron 2650 laptop, using the 2.4.21-pre3 kernel and the ACPI-20030125-2.4.21-pre3 patch (under RedHat 7.3). I can get some kind of suspend state working using 'echo 1 >/proc/acpi/sleep' but I don't think it's the genuine suspend-to-RAM state. For one thing, as soon as I put it into this state, one of the fans comes on and stays on (not very good when you're trying to conserve battery juice, but this is probably a Dell BIOS problem); and secondly, the screen doesn't actually seem to be turned off - I can still make out an image on it, it just looks like the backlighting has been turned off.
Nothing at all seems to happen if I try to echo 3, 4, 4b or 5 to /proc/acpi/sleep, which is strange since the ChangeLog for the latest ACPI patch mentions being able to change settings for the S3 suspend, and it also claims to incorporate the s4bios patch. If I cat /proc/acpi/sleep I get "S0 S1 S3 S4 S5", so I'm not sure if I'm doing something wrong, or if ACPI suspend-to-RAM support isn't fully functional yet.
So I'm wondering if anyone can give me any hints about getting these real suspend states to work? Any information would be much appreciated.
-Luke
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