Ubuntu
acpi-support package

Bluetooth cannot be disabled on Thinkpad T41p with Fn-F5 (w/Fix)

Bug #26181 reported by Martin Emrich
22
Affects Status Importance Assigned to Milestone
acpi-support (Ubuntu)
Fix Released
Medium
Unassigned

Bug Description

Hello!

When pressing Fn-F5, the Bluetooth modules gets enabled, but pressing it again
does not disable it in previous versions. Replacing the status query line in
/etc/acpi/ibm-wireless.sh with

state=`perl -e 'open BT,"/proc/acpi/ibm/bluetooth";foreach (<BT>) { if ($_ =~
/enabled/) { print "0"; } } close BT;'`

restores the toggle functionality. (Sorry that its no diff, I did not keep the
original version with the /sys/... query. Maybe some sh/awk/sed pro can rewrite
it w/o using perl).

Ciao

Martin

Revision history for this message
Loic Pefferkorn (loic) wrote :

Seems to be related to #24680
https://launchpad.net/distros/ubuntu/+source/acpi-support/+bug/24680/

Revision history for this message
Paul Sladen (sladen) wrote :

This is currently broken because:

  /etc/acpi/wireless.sh

looks for:

  /sys/class/net/eth1/wireless

which doesn't exist with the 'ipw2200' driver. (Does it exist for any other wifi drivers?---If not, checking for it is even more broken.)

Revision history for this message
Loic Pefferkorn (loic) wrote :

I've tested with 2 others pcmcia nics: (on my T43)

-Atheros based (module ath_pci)
Doesn't have /sys/class/net/ath0/wireless

-Ralink 2500 based (module rt2500)
Has /sys/class/net/ra0/wireless, but kernel warns this is deprecated
"ra0 (WE) Driver using old /proc/net/wireless support, please fix driver !"

It looks like a kernel driver level problem ?

Revision history for this message
Paul Sladen (sladen) wrote : ipw2200 power/state

Patching '/etc/acpi/wireless.sh':

--- /etc/acpi/wireless.sh~ 2005-09-02 20:12:42.000000000 +0300
+++ /etc/acpi/wireless.sh 2006-01-16 01:22:18.000000000 +0200
@@ -5 +5,2 @@
- if [ -d $DEVICE/wireless ]; then
+ if [ -d $DEVICE/wireless ] ||
+ grep -qa "^ *$(basename $DEVICE): " /proc/net/wireless; then

fixes that for the moment. But the following command that attempts to put the wireless card to sleep hangs (for the ipw2200):

echo -n 3 > $DEVICE/device/power/state

doing:

modprobe -r ipw2200

works.

Revision history for this message
Paul Sladen (sladen) wrote : check /proc/net/wireless and make ipw2200 use rf_kill=1

Following patch should fix both issues and makes the wifi and bluetooth toggle work as expected on my Thinkpad R52:

  http://www.paul.sladen.org/ubuntu/bugs/acpi-support_0.50-0ubuntu1.debdiff

Revision history for this message
Florian Boucault (fboucault) wrote :

Are you sure that the hack for ipw2200 is still necessary ? It seems to work here.

Revision history for this message
Paul Sladen (sladen) wrote :

I think the power-management code in the kernel has been fixed, so this is a no-op again.

Changed in acpi-support:
status: Unconfirmed → Fix Released
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