Bug 14576
| Summary: | asus-laptop: WiFi LED does not function with the iwl3945 module | ||
|---|---|---|---|
| Product: | Drivers | Reporter: | Donatas G. (dgvirtual) |
| Component: | Platform | Assignee: | Corentin Chary (corentin.chary) |
| Status: | CLOSED DOCUMENTED | ||
| Severity: | low | CC: | alan, linville, reinette.chatre, rui.zhang |
| Priority: | P1 | ||
| Hardware: | All | ||
| OS: | Linux | ||
| URL: | https://bugs.launchpad.net/ubuntu/+source/acpi-support/+bug/451108 | ||
| Kernel Version: | 2.6.31 | Subsystem: | |
| Regression: | No | Bisected commit-id: | |
| Bug Depends on: | |||
| Bug Blocks: | 56331 | ||
| Attachments: |
last 100 lines of dmesg - with output resulting of wifi toggle commands
Last 100 lines of kernel log Extended output from lspci |
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Created attachment 23723 [details]
Last 100 lines of kernel log
Created attachment 23724 [details]
Extended output from lspci
Are you using the asus-laptop module to manage this platform? The module makes some useful data available via sysfs that will help us see if its status matches with what the wireless driver. Could you please monitor the "ledd" and "wlan" sysfs files as you change wifi state with "Alt+F2" to see if they reflect the status correctly? Kernel module asus_laptop is loaded: dg@bala:~$ lsmod | grep asus asus_laptop 17400 0 led_class 4096 4 sdhci,iwl3945,iwlcore,asus_laptop So I tried to monitor the files as you suggested. root@bala:/# ls -l /sys/devices/platform/asus_laptop/ledd ---------- 1 root root 4096 2010-02-26 11:54 /sys/devices/platform/asus_laptop/ledd root@bala:/# cat /sys/devices/platform/asus_laptop/ledd cat: /sys/devices/platform/asus_laptop/ledd: Permission denied So I changed permissions to be able to monitor it: root@bala:/# sudo chmod 655 /sys/devices/platform/asus_laptop/ledd State: wireless on, wled off (after resume from sleep): root@bala:/# cat /sys/devices/platform/asus_laptop/ledd cat: /sys/devices/platform/asus_laptop/ledd: Input/output error root@bala:/# cat /sys/devices/platform/asus_laptop/wlan 1 Now I toggle it with Fn+F2: Wireless goes off, wled stays off: root@bala:/# cat /sys/devices/platform/asus_laptop/ledd cat: /sys/devices/platform/asus_laptop/ledd: Input/output error root@bala:/# cat /sys/devices/platform/asus_laptop/wlan 0 Now I push toggle it second time with Fn+F2: Wireless goes on, wled goes on: root@bala:/# cat /sys/devices/platform/asus_laptop/ledd cat: /sys/devices/platform/asus_laptop/ledd: Input/output error root@bala:/# cat /sys/devices/platform/asus_laptop/wlan 1 The wled actually goes on not because the kernel makes it do so, but because I have enabled acpi scripts to toggle it. The actual command that does it is: echo -n 0 > /sys/devices/platform/asus_laptop/wlan echo -n 1 > /sys/devices/platform/asus_laptop/wlan if I corrupt the script /usr/share/acpi-support/state-funcs that does it, /sys/devices/platform/asus_laptop/wlan status does not change upon toggling Fn+F2 while the actual wirelesss status does change. These tests were done using: root@bala:/# uname -a Linux bala 2.6.31-19-generic #56-Ubuntu SMP Thu Jan 28 01:26:53 UTC 2010 i686 GNU/Linux (In reply to comment #4) > Kernel module asus_laptop is loaded: > > dg@bala:~$ lsmod | grep asus > asus_laptop 17400 0 > led_class 4096 4 sdhci,iwl3945,iwlcore,asus_laptop > > So I tried to monitor the files as you suggested. > > root@bala:/# ls -l /sys/devices/platform/asus_laptop/ledd > ---------- 1 root root 4096 2010-02-26 11:54 > /sys/devices/platform/asus_laptop/ledd This is strange ... it really looked from the driver as though this should be readable and writable. > The wled actually goes on not because the kernel makes it do so, but because > I > have enabled acpi scripts to toggle it. The actual command that does it is: > > echo -n 0 > /sys/devices/platform/asus_laptop/wlan > echo -n 1 > /sys/devices/platform/asus_laptop/wlan > > if I corrupt the script /usr/share/acpi-support/state-funcs that does it, > /sys/devices/platform/asus_laptop/wlan status does not change upon toggling > Fn+F2 while the actual wirelesss status does change. Could you please elaborate on why you did this? It sounds like the acpi scripts are doing the right thing ... why did you disable them? I do not see much the driver can do here ... perhaps this bug should rather be assigned to the platform group. re-assign to Corentin Chary. Please read: http://dev.iksaif.net/projects/acpi4asus/wiki/WAPF_and_Leds http://dev.iksaif.net/projects/acpi4asus/wiki/Asus-laptop_WAPF And see if wapf can do something for you. Most of the time, the led is down when bluetooth *and* wlan devices are down. I have tried toggling wapf parameter of asus_laptop module, with no success (hardware control of led does not work). So, it means that the support does not work, and there is nothing to be fixed? (In reply to comment #4) I corrupt the script, because it is a way of testing if hardware control of the LED is working... The part about the software toggling of the LED state is removed from all versions of Ubuntu since I reported this bug, so in a sense, it is corrupted by default on ubuntu. If I get it right, I should go back and report this in Ubuntu bugtracker, for they should get the scripts right in asus acpi module. |
Created attachment 23722 [details] last 100 lines of dmesg - with output resulting of wifi toggle commands Hardware Environment: Asus A8F Software Environment: Kubuntu 9.10 (i386) Problem Description: WiFi LED does not toggle together with the wireless radio Extended problem description: On Asus A8F laptop the wireless LED does not update according to the actual wifi radio state: after boot the wireless is on and the LED is on; upon toggling wireless of with Alt+F2 the wireless is turned off, but the LED remains on. But if I put the laptop to sleep ad wake it up, the wireless comes back nicely, but the LED now is off and no longer toggles to on (though the wireless radio itself continues to toggle fine). Wireless card: Intel Corporation PRO/Wireless 3945ABG me@bala:~$ uname -a Linux bala 2.6.31-14-generic #48-Ubuntu SMP Fri Oct 16 14:04:26 UTC 2009 i686 GNU/Linux me@bala:/var/log$ lspci | grep Wireless 01:00.0 Network controller: Intel Corporation PRO/Wireless 3945ABG [Golan] Network Connection (rev 02)