Kernel Bug Tracker – Bug 59261
TX power change causing WiFi stability issues.
Last modified: 2013-06-12 13:04:16 UTC
Created attachment 103301 [details]
Patch supplied by Mike Romberg.
Related to this bug:
WiFi stability has regressed on certain cards because of the change in TX power.
Attached patch fixes the issue (works with Kernel 3.9.4).
Please provide information about your Ralink chipset , it should be printed in dmesg. For example my chip is like below:
[ 2380.163512] ieee80211 phy4: rt2x00_set_rt: Info - RT chipset 3572, rev 0223 detected
[ 2380.178868] ieee80211 phy4: rt2x00_set_rf: Info - RF chipset 0009 detected
Can't seem to find it with dmesg, here's what I get from lspci:
02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 06)
03:00.0 Network controller: Ralink corp. RT5390 Wireless 802.11n 1T/1R PCIe
I wish to know detailed chipset revision. This is printed by default to dmesg starting from 3.9 kernel. Older kernels have to be compiled with CONFIG_RT2X00_DEBUG to get that information.
Here's dmesg on the 3.9.4 kernel:
[ 8.306092] phy0 -> rt2x00_set_chip: Info - Chipset detected - rt:5390, rf: 5390, rev: 0502.
[ 8.387344] phy0 -> rt2x00lib_request_firmware: Info - Loading firmware file 'rt2860.bin'.
[ 8.440968] phy0 -> rt2x00lib_request_firmware: Info - Firmware detected - version: 0.34.
I attached different patch at RH bugzilla
Please test if it also prevent the problem.
Thank you Stanislaw. Will this also help 3.8.13 and Broadcom chips (that are having similar issues)?
No, that patch is Ralink specific, it affect only RT5390 and RT3290 chips.
Is there a possible universal fix?
No. Problem reported in RH bugzilla is rt2x00 specific. You have to open a separate bug report for Broadcom issue.
Patch addressing this bug was posted:
Thank you Stanislaw. Things are working nicely for me on the vanilla 3.9.5 kernel.