Thanks Emmanuel. On 01/11/15 14:16, Emmanuel Grumbach wrote: > Hi Chris, > > thank you for you analysis, it is very helpful > You're welcome. >> Doh! Cut and paste error ... >> >> On 01/11/15 12:56, Chris Clayton wrote: >>> Hi Kalle, >>> >>> Having recently bought a new laptop, I've just started using the iwlwifi driver for wireless networking. I found both >>> 3.18.x and the current development tree to be very unreliable due to frequent disconnections from the router. >>> >>> Before you merged them into your tree, I grabbed the latest fixes from iwlwifi-fixes tree and applied them to the >>> development kernel. Since I did that I've had no problems at all with dropped connections. I then looked at each patch >>> to see whether it might be applicable to 3.18 and found that two of them looked as if they should be useful. They are: >>> >>> c93edc639392df733c7d72db4376a9add775d18a - iwlwifi: mvm: don't allow diversity if BT Coex / TT forbid it >> >> The above should have been: >> >> c93edc639392df733c7d72db4376a9add775d18a - iwlwifi: mvm: fix Rx with both chains >> >>> >>> a9dc5060bf3a32ac3dad472f15416054b92dc5b5 - iwlwifi: mvm: fix out of bounds access to tid_to_mac80211_ac >>> >>> With those two applied, I've had stable wireless networking on 3.18.2 and, more recently, 3.18.2. Consequently, they >>> seem appropriate for tagging for 3.18-stable, but, as far as I can see, they haven't been tagged for stable. Apologies, >>> if I'm mistaken, but if I'm not, could you consider submitting the two patches for inclusion in 3.18, please? Of course, >>> they may be appropriate to earlier kernels too - I haven't looked. >>> > > The first one (c93edc639392df733c7d72db4376a9add775d18a) is tagged for stable. Ah, sorry I missed that. > Are you using bluetooth? Yes, I have a bluetooth mouse and use bluetooth for audio from time to time. > Are you able to tell me which of the two really helps? It's c93edc639392df733c7d72db4376a9add775d18a that helps. With that applied, I can set off a task which, in a loop, continually copies a 180MB file from a server on my network. The network remained stable for over 30 minutes before I killed the task. Without the patch, the network fails during the first iteration of copying the file. a9dc5060bf3a32ac3dad472f15416054b92dc5b5 doesn't seem to have any effect on the instability. > Unless I am missing something, the first one > (c93edc639392df733c7d72db4376a9add775d18a) should help only if you > disabled power save. Is that the case? Not that I know of. The only power-related thing in my init scripts is echoing 5 to /proc/sys/vm/laptop_mode, which I believe configures disk activity to save power. The mouse does have a power saving feature, however. According to the manual, it reduces its power consumption in steps the longer it is inactive. As I frequently work in kde's konsole terminal application, mouse inactivity is common. Hope this helps and feel free to request additional information. Chris > -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
