Kernel Bug Tracker – Bug 59691
Bad connectivity with ath9k AR9485 when power management off
Last modified: 2013-10-15 16:04:34 UTC
Moved from https://bugzilla.kernel.org/show_bug.cgi?id=49201https://bugzilla.kernel.org/show_bug.cgi?id=49201 where it came up:
All works fine with power management off with fixes from bug 49201, but with power management off, when I look at the iwconfig bit rate every five
seconds, it's mostly 65 Mbps but about every once in 25 .. once in 50 it's 1
Mbps. Also, occasionally there are longer periods of low speed
(1..30 Mbps) and this affects also practical usability quite a lot.
Hardware: asus transformer book tx300 (4005)
Can you load the driver with debug=0x8f49 and post the kernel log when this issue happens ? Also the contents of the debugfs files, "rc_stats", "xmit".
If you can use the wireless-testing tree, that would be great since it contains the latest code and patches are posted against it, for John to pick up.
OK, I try to do that but probably not in the next few days. It seems mostly this is not a big practical issue, had power management off for a long while and didn't notice any big problems.
To correct the description, I meant to write that all works fine power management on, but the problems are with power management off.
Are you still seeing this issue with the latest wireless-testing kernel ?
I'll test, pulling the wireless-testing tree now.
I can't repeat the reported issue with wireless-testing tree pulled at 2013-08-23.
Also, no significant difference observed with power on & off behaviour looking at the speed as reported by iwconfig and speedtest.net.
With 3.11.0-rc6-wl+, compared to the earlier 3.10.0-rc6, I did have some more trouble getting the wlan connected. But that might well be slight differences in the location of the computer & base station & other wiring.
Ok, thanks for testing.