Hello, the wifi hardware on the Pandaboard ES, which is a TI wl1271 (WiLink 6.0), gets screwed up by doing one up/down cycle. This can either be a "ifconfig wlan0 up && ifconfig wlan0 down", or something else that trigger firmware booting inside wl12xx (e.g. wpa_supplicant also "works"). I get this output on the first try (which works): wlcore: firmware booted (Rev 6.3.10.0.133) wlan0: authenticate with a0:f3:c1:46:2c:e4 wlan0: send auth to a0:f3:c1:46:2c:e4 (try 1/3) wlan0: authenticated wlan0: associate with a0:f3:c1:46:2c:e4 (try 1/3) wlan0: RX AssocResp from a0:f3:c1:46:2c:e4 (capab=0x431 status=0 aid=2) wlan0: associated cfg80211: Calling CRDA for country: DE cfg80211: Regulatory domain changed to country: DE cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp) cfg80211: (2400000 KHz - 2483500 KHz @ 40000 KHz), (N/A, 2000 mBm) cfg80211: (5150000 KHz - 5250000 KHz @ 40000 KHz), (N/A, 2000 mBm) cfg80211: (5250000 KHz - 5350000 KHz @ 40000 KHz), (N/A, 2000 mBm) cfg80211: (5470000 KHz - 5725000 KHz @ 40000 KHz), (N/A, 2698 mBm) cfg80211: (57240000 KHz - 65880000 KHz @ 2160000 KHz), (N/A, 4000 mBm) wlcore: Association completed. I then quit wpa_supplicant, and start it again: wlcore: down wlcore: ERROR timeout waiting for the hardware to complete initialization wlcore: ERROR timeout waiting for the hardware to complete initialization wlcore: ERROR timeout waiting for the hardware to complete initialization wlcore: ERROR firmware boot failed despite 3 retries I have to do a cold reboot of the Pandaboard to get it running again. A warm reboot doesn't suffice. I found a similar report here: http://comments.gmane.org/gmane.linux.ports.arm.omap/104993 The commit mentioned in the report: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=851320e3f33503f557135a7fef6da66a2f7eec55 Quoting from the commit message: "Note that looks like the WLAN interface fails to come up after a warm reset, but that most likely was also happening with the legacy booting and needs a separate fix." I cannot confirm this. With the 3.4 kernel from TI (http://dev.omapzoom.org/?p=integration/kernel-ubuntu.git;a=shortlog;h=refs/heads/ti-ubuntu-3.4-stable) the wl1271 device survives many up/down cycles. Greets, Tobias
Created attachment 112351 [details] vanilla-3.12-rc6 config
Created attachment 112361 [details] dmesg output after one up/down cycle
Confirming that these patches (applied on top of 3.12.1) fix the issue: https://patchwork.kernel.org/patch/3218501/ https://patchwork.kernel.org/patch/3218511/ Going to close this, once they hit mainline.
Patches are in mainline. Closing.