** Description changed:
Binary package hint: linux-source-2.6.28
This is on Jaunty.
After switching to AC power, the display changes brightness approximately
every 1.5 seconds as if the AC is being rapidly unplugged and reinserted.
Other symptoms include:
- - the laptops charge LED does not come back on.
+ - the laptops charge LED does not come back on unless AC is reconnected while
in resume.
- ~70% CPU usage (35 % user, 35% sys), and the load average rises to about
3.5. Processes like kacpid, kacpi_notify, dbus-daemon, hald and udevd are using
CPU. If I kill gnome-power-manager the CPU usage drops to 40%, and if I run
"/etc/init.d/acpid stop" it drops to 10%.
By continuously reading /var/lib/acpi-support/powerstate or
/proc/acpi/ac_adapter/ACAD/state, I can tell the AC states last less
than one second. I do not believe this is a hardware issue because if I
- suspend/resume, AC becomes stable. If AC is connected at boot it is also
- initially stable, and the machine was working on Intrepid.
+ plug it in while in suspend then resume, AC becomes stable. If AC is
+ connected at boot it is also initially stable, and the machine was
+ working on Intrepid. It appears to me as though the BIOS and kernel are
+ arguing over the power state.
I tried editing /etc/default/acpid and setting MODULES="" but it didn't
help. Then I updated the BIOS. I also tried the acpi kernel options as
follows:
acpi=off
X would not start due to display problems.
can not reconnect AC - LED stays out once disconnected.
system hangs on attempt to use brightness adjust keys.
acpi=ht
display flicker gone.
can not reconnect AC - LED stays out once disconnected.
system hangs on attempt to use brightness adjust keys.
pci=noacpi
display flicker gone.
can not reconnect AC unless via suspend/resume - otherwise AC LED stays out
once disconnected.
brightness adjust keys don't work.
Interestingly at this point, reading /proc/acpi/ac_adapter/ACAD/state often
toggles the power mode!
The display dims/brightens and the output changes between off-line/on-line.
I can reproduce this on demand by running "cat
/proc/acpi/ac_adapter/ACAD/state" a few times.
Why would this happen?
acpi=noirq
Same results as with pci=noacpi
pnpacpi=off
Problem is present as with normal boot.
noapic
Problem is present as with normal boot.
nolapic
Problem is present as with normal boot.
$ apt-cache policy linux-source-2.6.28 linux-image-2.6.28-11-generic
linux-source-2.6.28:
Installed: (none)
Candidate: 2.6.28-11.42
Version table:
2.6.28-11.42 0
500 http://ftp.iinet.net.au jaunty/main Packages
linux-image-2.6.28-11-generic:
Installed: 2.6.28-11.42
Candidate: 2.6.28-11.42
Version table:
*** 2.6.28-11.42 0
500 http://ftp.iinet.net.au jaunty/main Packages
100 /var/lib/dpkg/status
I'm also including attachments of any output I can think will be useful.
--
can't switch to AC power, flickering display on Presario M2217AP
https://bugs.launchpad.net/bugs/370517
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
--
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
