On Monday 06 December 2010 17:34:15 Wade Fitzpatrick wrote: > I could not get anything sensible from carl9170. I will keep trying though. hmm, hard to say what it is? I bet it could be conflicting stack/driver modules. (i.e.: the driver is from compact-wireless, whereas the mac80211, or cfg80211 is the original module from 2.6.36) > The Otus message comes from arusb_lnx which was loaded automatically > after ar9170usb. Should I remove the arusb_lnx.ko file? either that, or add it to the module blacklist (also in /etc/modprobe.d) > I did not patch the driver as I am not clear what MCS and minstrel_ht are. <http://en.wikipedia.org/wiki/IEEE_802.11n-2009> #Data Rates "Data rates up to 600 Mbit/s are achieved only with the maximum of four spatial streams using a 40 MHz-wide channel. Various modulation schemes and coding rates are defined by the standard and are represented by a Modulation and Coding Scheme (MCS) index value." minstrel* is mac80211's default rate control algorithm. The original minstrel only supports legacy (802.11a/b/g) data rates and minstrel_ht only selects 802.11n MCS (index). > Simply unloading the modules and modprobing them again does not work > reliably. I think it must be due to not reloading the firmware > properly. The ar9170usb, otus and all windows-driver firmware will only be uploaded once (on the first time a driver is loaded). All later upload attempts are ignored. The problem here is that the firmware program can't be easily replaced "in-place" without breaking compatibility or functionality. > I added the mac80211 options to modprobe.conf and after rebooting, > both wireless dongles are stable and ping times are back to normal for > the ar9170usb driver. no need to reboot, you can unload modules with modprobe -r / rmmod [as long as the modules are not in use, or an other loaded module depends on it]. > # > # /etc/modprobe.d/modprobe.conf (for v2.6 kernels) > # > options mac80211 ieee80211_default_rc_algo=minstrel the problem with this is that carl9170 (or any other driver that relies on minstrel_ht to supply 802.11n MCS rates) are limited to the legacy rates (and physpeeds of 54Mbit) > BTW - my AP is a Netgear WNR2000v2 > I can do further testing if you would like me to. Well, we had a funny incidents with WNDR3700. <http://www.spinics.net/lists/linux-wireless/msg56581.html> after some initial problems with WMM, he got it sort-of-working. This "sort-of" should be fixed now: <http://www.spinics.net/lists/linux-wireless/msg60612.html> Best regards, Christian -- 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
