Bug#511653: laptop-mode-tools: When the wireless interface is down, wireless-iwl-power fails
Hi Costas, cost...@students.cs.unipi.gr wrote: Quoting Bart Samwel b...@samwel.tk: Thanks for reporting and contributing. Apparently we cannot tell the driver to use a certain power level when the hardware is disabled... This is a shame, because the power level will be incorrect when the device is re-enabled -- laptop mode tools doesn't re-apply settings when interfaces are enabled or disabled. I wonder, does this problem happen only when the hardware kill switch is used? Or does this already go wrong if you just do an ifdown on your device (as indicated by /sys/class/net/$DEVICE/operstate)? I wonder if there are other things that can't be used if the device's radio is killed. Might be worth a submitting a bug report to the iwl guys... Cheers, Bart Hello again Bart, When I submitted the bug, the wireless was killed by the hardware rf switch on boot. If it is killed by the switch, cat /sys/class/net/wlan0/device/enable gives 0 cat /sys/class/net/wlan0/operstate gives down Now, if i turn the rf switch to on and keep the interface down: cat /sys/class/net/wlan0/device/enable gives 0 cat /sys/class/net/wlan0/operstate gives down During ifconfig ups/ifconfig downs /sys/../operstate remains down, /sys/../enable changes according to up/down. As it seems, for operstate to work i have to be connected to an ap. ifconfig wlan0 up just doesn't change it. In my /etc/network/interfaces i have no section for wlan0. The /sys/class/net/wlan0/device/enable maybe better for laptop-mode, because many people don't have an rf switch or are not connected to ap at boot. I've reported this problem upstream because I really don't think this should be my problem to solve: http://www.intellinuxwireless.org/bugzilla/show_bug.cgi?id=1893 If they don't respond positively I'll have to reconsider, but for now I'll wait to see what they say! Cheers, Bart -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org
Bug#511653: laptop-mode-tools: When the wireless interface is down, wireless-iwl-power fails
Hi Constantinos, Constantinos Drogos wrote: Hello. In my system, wireless-iwl-power module fails at startup of laptop-mode-tools, if the wireless interface are not up. The error seems to be that the scriptcannot write power level to /sys/class/net/$DEVICE/device/power_level if $DEVICE is down. The error showed is: /usr/share/laptop-mode-tools/modules/wireless-iwl-power: line 48: echo: write error: Resource temporarily unavailable The driver used is the iwl3945. The error seems to be corrected if everytime it searches for an interface, it checks if it is up via /sys/class/net/$DEVICE/device/enable (1 for up, 0 for down) This change seems to work at least in my computer: Thanks for reporting and contributing. Apparently we cannot tell the driver to use a certain power level when the hardware is disabled... This is a shame, because the power level will be incorrect when the device is re-enabled -- laptop mode tools doesn't re-apply settings when interfaces are enabled or disabled. I wonder, does this problem happen only when the hardware kill switch is used? Or does this already go wrong if you just do an ifdown on your device (as indicated by /sys/class/net/$DEVICE/operstate)? I wonder if there are other things that can't be used if the device's radio is killed. Might be worth a submitting a bug report to the iwl guys... Cheers, Bart -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org
Bug#511653: laptop-mode-tools: When the wireless interface is down, wireless-iwl-power fails
Quoting Bart Samwel b...@samwel.tk: Thanks for reporting and contributing. Apparently we cannot tell the driver to use a certain power level when the hardware is disabled... This is a shame, because the power level will be incorrect when the device is re-enabled -- laptop mode tools doesn't re-apply settings when interfaces are enabled or disabled. I wonder, does this problem happen only when the hardware kill switch is used? Or does this already go wrong if you just do an ifdown on your device (as indicated by /sys/class/net/$DEVICE/operstate)? I wonder if there are other things that can't be used if the device's radio is killed. Might be worth a submitting a bug report to the iwl guys... Cheers, Bart Hello again Bart, When I submitted the bug, the wireless was killed by the hardware rf switch on boot. If it is killed by the switch, cat /sys/class/net/wlan0/device/enable gives 0 cat /sys/class/net/wlan0/operstate gives down Now, if i turn the rf switch to on and keep the interface down: cat /sys/class/net/wlan0/device/enable gives 0 cat /sys/class/net/wlan0/operstate gives down During ifconfig ups/ifconfig downs /sys/../operstate remains down, /sys/../enable changes according to up/down. As it seems, for operstate to work i have to be connected to an ap. ifconfig wlan0 up just doesn't change it. In my /etc/network/interfaces i have no section for wlan0. The /sys/class/net/wlan0/device/enable maybe better for laptop-mode, because many people don't have an rf switch or are not connected to ap at boot. -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org
Bug#511653: laptop-mode-tools: When the wireless interface is down, wireless-iwl-power fails
Package: laptop-mode-tools
Version: 1.45-1
Severity: normal
Hello.
In my system, wireless-iwl-power module fails at startup of laptop-mode-tools,
if the wireless
interface are not up. The error seems to be that the scriptcannot write power
level to
/sys/class/net/$DEVICE/device/power_level if $DEVICE is down.
The error showed is: /usr/share/laptop-mode-tools/modules/wireless-iwl-power:
line 48: echo: write error:
Resource temporarily unavailable
The driver used is the iwl3945.
The error seems to be corrected if everytime it searches for an interface, it
checks if it is
up via /sys/class/net/$DEVICE/device/enable (1 for up, 0 for down)
This change seems to work at least in my computer:
--- wireless-iwl-power 2009-01-13 03:52:00.0 +0200
+++ wireless-iwl-power-new 2009-01-13 04:34:10.0 +0200
@@ -16,6 +16,7 @@
findWifiIfsByDriver () {
local DEVICE;
local LINK_TARGET;
+local ENABLED;
for DEVICE in /sys/class/net/*; do
if [ -d $DEVICE/wireless -a -h $DEVICE/device/driver ]; then
@@ -23,8 +24,8 @@
# the driver.
LINK_TARGET=`readlink $DEVICE/device/driver`
LINK_TARGET=${LINK_TARGET##*/}
-
- if [ $LINK_TARGET = $1 ] ; then
+ENABLED=`cat $DEVICE/device/enable`
+ if [ $LINK_TARGET = $1 ] [ $ENABLED -eq 1 ] ;
then
# add the interface name to the list
WIFI_IFNAMES=$WIFI_IFNAMES ${DEVICE##*/}
-- System Information:
Debian Release: 5.0
APT prefers testing
APT policy: (900, 'testing'), (800, 'unstable'), (500, 'experimental')
Architecture: i386 (i686)
Kernel: Linux 2.6.28-2-erebus (SMP w/2 CPU cores; PREEMPT)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash
Versions of packages laptop-mode-tools depends on:
ii lsb-base 3.2-20 Linux Standard Base 3.2 init scrip
ii util-linux2.13.1.1-1 Miscellaneous system utilities
Versions of packages laptop-mode-tools recommends:
ii acpid 1.0.8-1Utilities for using ACPI power man
ii hal 0.5.11-8 Hardware Abstraction Layer
ii hdparm8.9-3 tune hard disk parameters for high
ii sdparm1.02-1 Output and modify SCSI device para
laptop-mode-tools suggests no packages.
-- no debconf information
--
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