I'm not top-posting, so my additions are fairly far down.
On Mon, 26 Jun 2006, David A. De Graaf wrote:
On Sat, Jun 24, 2006 at 09:51:36PM -0400, Matthew Saltzman wrote:
On Sat, 24 Jun 2006, David A. De Graaf wrote:
With kernel-2.6.17-1.2139_FC5 my IBM T30 laptop will no longer enter sleep
mode. More accurately, it won't wake up. When I close the lid and later
reopen it, the old XFCE4 display lights up, but is frozen. Nothing works -
CTL-ALT-F2, CTL-ALT-BS. The only option is to press and hold the power
button to shutdown and reboot.
I was so proud of myself for finally figuring out how to make the sleep
mode work with the broken FC5. The documentation is mighty sparse.
If I create these additional files, sleep mode seems to work, although
I'm not sure that the battery drain is as low as it used to be:
Actually, on my T41, FC5 is the first release to suspend/resume correctly
right out of the box (modulo an issue with powering off the graphics chip
that's been around for a while and has a known workaround). But I can
think of a few points to consider. For one thing, I'm running GNOME.
One might hope that the window manager would simply manage windows and
have no effect on the sleep function - but that would be probably be
utopian and naive.
GNOME has an applet that interacts with pm-utils to control power
behavior. I think that's all.
Were you using APM or ACPI in FC4?
I misspoke that sleep mode works in FC4. Apparently that was
remembered from an even earlier time, say, FC3. Sorry!
Did you update from FC4 or do a fresh install? Do you have pm-utils
installed?
I freshly installed FC5, but I retained a separate partition with the
entire FC4 system. By rebooting the FC4 system, I found that sleep
mode didn't work there, either. In the earlier system that did work I
must have been using APM, because I only recently learned about ACPI,
and the new control files that must be added to make sleep work.
I do have pm-utils installed, but don't knowingly use any of the 11
programs contained because there are only 2 man pages, and one of them
is wrong - on_ac_power returns 0 with or without the charger connected.
Call me a coward, but I lack enthusiasm for blindly trying programs that
suggest they might irreversibly change the state of my machine.
A fresh install of FC5 sets these up by default to do power management.
What's your video card? Are you seeing the machine indicate that it's
suspended properly but just stay hot and drain the battery? What part of
the machine stays hot?
lspci says my IBM T30 laptop has this:
01:00.0 VGA compatible controller: ATI Technologies Inc
Radeon Mobility M7 LW [Radeon Mobility 7500]
I haven't accurately measured the comparative rates of battery
discharge while asleep vs. awake because it takes a long time to do
the experiment. I will, though.
I do have the subjective recollection that when the earlier non-ACPI
system slept, the battery drain was very, very low.
Now, after pressing Fn-F4 to enter sleep mode, I can see that the screen,
although blank, seems to still have the backlight on. That would seem
to use power unnecessarily, but I can't find any way to turn that off,
too.
OK try the following:
(1) Edit /etc/modprobe.conf and add the following:
options radeonfb radeon_force_sleep=1
(2) Create /etc/sysconfig/mkinitrd containing the following line:
MODULES="radeonfb"
(3) Rebuild your initrd:
mkinitrd -f /boot/initrd-2.6.17-1.2139_FC5.img 2.6.17-1.2139_FC5
(4) Reboot.
(5) Test suspend.
Are you logged in when you suspend?
Yes, certainly. I'm running X, and xfce4.
OK because I've seen that closing the lid from the login screen does not
suspend.
I've also just tried sleeping from a basic console - with no X running -
with both kernel 2.6.16-1.2133_FC5 and 2.6.17-1.2139_FC5.
Both kernels sleep and awaken satisfactorily. Therefore the failure of
the newer kernel to awaken with X running is almost surely a misfunction
with the X server.
No real surprise there...
--
Matthew Saltzman
Clemson University Math Sciences
mjs AT clemson DOT edu
http://www.math.clemson.edu/~mjs
