On Tue, Aug 15, 2017 at 10:58:42AM +0100, Russell King - ARM Linux wrote: > Sorry for the confusion - the problem with iwlwifi turned out to be a > lack of /dev/random entropy, causing hostapd to forcefully deauth the > client - that was hidden when running hostapd from systemd and is only > visible if you run hostapd manually. > > (I have other problems there - manually starting hostapd works every > time, but when started using systemctl start hostapd, systemctl status > hostapd always reports that it's started but exited and it definitely > isn't running... I'm just hitting one problem after another here with > wireless, I'm quite sure this tech hates me!) > > However, I'm still having problems with the Realtek not getting further > than _allegedly_ sending the auth frames - I'm not convinced that the > driver is actually sending anything yet. I can't see anything suggesting > it is from iwlwifi in monitor mode, and enabling all the debug for the > rtl8xxxu driver doesn't give the slightest hint that this driver is > doing anything remotely useful to transmit these frames. For instance: > > [41742.979480] usb 1-1: rtl8xxxu_read32(0440) = 0x0000000f, len 4 > [41742.985826] usb 1-1: rtl8xxxu_write32(0440) = 0x0000000f > [41742.994470] usb 1-1: rtl8xxxu_write8(0480) = 0x04 > [41742.999430] wlan0: send auth to 6c:ad:f8:1d:4c:d9 (try 1/3) > [41743.206163] wlan0: send auth to 6c:ad:f8:1d:4c:d9 (try 2/3) > [41743.414148] wlan0: send auth to 6c:ad:f8:1d:4c:d9 (try 3/3) > [41743.622138] wlan0: authentication with 6c:ad:f8:1d:4c:d9 timed out > [41743.629100] usb 1-1: rtl8xxxu_write8(0618) = 0x00 > [41743.636490] usb 1-1: rtl8xxxu_write8(0619) = 0x00 > [41743.641573] usb 1-1: rtl8xxxu_write8(061a) = 0x00 > > How can it send auth packets without writing to any registers (this is > with all debug options set in /sys/module/rtl8xxxu/parameters/debug !) > > So, I don't think the 4330 has a problem, I think it's all down to > the Realtek driver being buggy. And things get even weirder - if I reboot, rtl8xxxu fails to associate: [ 38.377649] wlan0: authenticate with 6c:ad:f8:1d:4c:d9 [ 38.410252] wlan0: send auth to 6c:ad:f8:1d:4c:d9 (try 1/3) [ 38.616678] wlan0: send auth to 6c:ad:f8:1d:4c:d9 (try 2/3) [ 38.824660] wlan0: send auth to 6c:ad:f8:1d:4c:d9 (try 3/3) [ 39.032645] wlan0: authentication with 6c:ad:f8:1d:4c:d9 timed out if I then rmmod the rtl8xxxu module and reinsert the exact same module: [ 49.914724] wlan0: authenticate with 6c:ad:f8:1d:4c:d9 [ 49.935765] wlan0: send auth to 6c:ad:f8:1d:4c:d9 (try 1/3) [ 49.943182] wlan0: authenticated [ 49.956116] wlan0: associate with 6c:ad:f8:1d:4c:d9 (try 1/3) [ 49.971504] wlan0: RX AssocResp from 6c:ad:f8:1d:4c:d9 (capab=0x411 status=0 aid=2) [ 49.985466] usb 1-1: rtl8xxxu_bss_info_changed: HT supported [ 49.997918] wlan0: associated This looks like a rtl8xxxu driver / core mac80211 bug, so I'll take it to the rtl8xxx folk now. -- RMK's Patch system: http://www.armlinux.org.uk/developer/patches/ FTTC broadband for 0.8mile line in suburbia: sync at 8.8Mbps down 630kbps up According to speedtest.net: 8.21Mbps down 510kbps up
