I will divide this into two sections, suspend and hibernation, for
better understanding.
Suspend:
After reading the triage and debugging guide, I noticed this advice:
"The usual problem occurs when resuming, and normally the culprit is a device
driver that does not recover from a powered down state."
So I had and idea: deactivate the module for WiFi (rtl8187), because it
is kinda buggy (ndiswrapper used to work better.), and... voilà! Suspending
works! I've resumed and suspended several times and Ubuntu did it gracefully.
Just to make sure, I re-inserted the rtl8187 module and... suspend didn't work
anymore.
Could somebody else with this laptop confirm if it is related to the
rtl8187 module?
One interesting note to add: the laptop does not suspend if the lid is
closed. Ubuntu takes me back to the unlock prompt. When the lid is open, it
works perfectly. Solution: close the lid only after the laptop is fully
suspended.
Following the debug instructions didn't help much. The "rebooting with
no_console_suspend" thing just gave me a black screen with the blinking cursor
on top left of the screen (no flashing keyboard LEDs), and the "sync; echo 1 >
/sys/power/pm_trace; pm-suspend" gave me the same result, although I've grabbed
a dmesg after rebooting. (attached dmesg-output.txt)
[ 5.108036] Magic number: 1:908:515
Dunno what this line means, but the guide recommended to find it.
Note: Suspend once worked well in Ubuntu 8.04 LTS, maybe because it
didn't detect my wireless card, so the rtl8187 module was never loaded.
Temporary solution: blacklist the rtl8187 module. I do not use wireless
often, and when I need it, I use a (eek!) virtual machine with Windows.
Hibernation:
It is not working regardless of the rtl8187 module. So, for the test,
I've left it enabled.
1. pm-hibernate with no_console_suspend kernel option.
Didn't hibernate, as usual. No output on the console. Was able
to switch tty (CTRL+ALT+F1....F5) but no keyboard input was accepted. Tried
CTRL+ALT+F7 to switch to X, and the system stopped working.
2. Per-subsystem hibernation testing
The computer locked when I issued the command "echo disk >
/sys/power/state". Was able to switch tty (CTRL+ALT+F1....F5) but no keyboard
input was accepted. Tried CTRL+ALT+F7 to switch to X, and the system stopped
working, just like test #1.
Note: hibernation worked well in Ubuntu 8.04 LTS.
** Attachment added: "dmesg-output.txt"
http://launchpadlibrarian.net/24388699/dmesg-output.txt
--
[TOSHIBA Satellite A215] suspend/resume failure when testing Suspend in Jaunty
Alpha 6 on laptop
https://bugs.launchpad.net/bugs/342656
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