PDA

View Full Version : [ubuntu] WiFi hotkey freezes system when wlan0 is up.



Dean_Kreger
July 12th, 2011, 11:19 PM
Hi all! I've been doing some poking around, and I've seen some problems along these lines with other laptops, but I haven't been able to find any for my system... I'm running an HP Envy15 1270ca (http://h10025.www1.hp.com/ewfrf/wc/document?docname=c02246343&tmp_task=prodinfoCategory&lc=en&dlc=en&cc=ca&site=null&key=null&product=4221246) under Ubuntu Server 11.04 (2.6.38-8-server).

DETAILS


If I start the system with no auto wlan0 entry in my /etc/network/interfaces the wifi hotkey acts as expected: The system detects a dis/connect of the device, and nothing more happens.
If I then issue ifup wlan0 and attempt to do the same, it detects the disconnect, but if I do not re-enable the wifi quickly the system locks up completely (with or without X).
Furthermore, if the system locks up from disabling the wifi, it will freeze during boot until I re-enable wifi with the hotkey. But, if the wifi is disabled when wlan0 is down, then it will boot just fine.

CONFIGURATION


I'm configuring my wifi adapter by hand with wpa_supplicant, configuration can be viewed here (http://sprunge.us/OVNR). It's brought up by /etc/network/interfaces at boot, as can be seen here (http://sprunge.us/IZDd).
Could the inclusion of "allow-hotplug" be incorrect?

OTHER INFORMATION
I'm not really sure what I need to include for extra info, so I'll just do a few that may be helpful...


lshw (http://sprunge.us/VQCA)
lsmod (http://sprunge.us/PQER) (brcm80211)
lspci (http://sprunge.us/JPAI)


This isn't really a serious problem, and it's currently the only thing I have not got working the way I would like on this laptop. The unfortunate part is the hotkey's location: between F12 and PRTSCR, two keys I happen to use frequently. I have only hit it twice accidentally, and the second time I was able it re-enable it before the system locked up.

As a final thought, I'm wondering if I could create an event listener for the USB disconnect and have it bring down wlan0 before a lockup... Would the hotkey need to be enabled for wlan0 to be brought down?


--
Justin

P.S.: An action shot of the system! (http://i.imgur.com/Rg2kg.png)

Dean_Kreger
July 14th, 2011, 07:24 PM
Bump... Anyone?