Re: hardware restart on Intel 7260

[Johann Haarhoff]

> Meh... So what happens here is that the firmware is stuck while
> transmitting. The driver detects this and as a workaround, resets the
> firmware. The detection takes 10 seconds.
> The only way to understand what is going on here is to take the
> firmware from [1] and to run the steps to collect firmware debug data
> from [2]. I recommend you open a bug on bugzilla.
> Out of curiosity, did you try to work in DC mode (on battery, not
> connected to the power)? A user reported that it helped [3].

I followed the steps you suggested, and am now tracking the bug here:

https://bugzilla.kernel.org/show_bug.cgi?id=116191



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hardware restart on Intel 7260

[Johann Haarhoff]

Hi

(Please CC as I am not subscribed to the list)

I'm seeing the following trace on a Lenovo Yoga 2 Pro with an Intel 7260 (rev 
6b).

Kernel is 4.5 on using the latest -16 firmware from wireless.wiki.kernel.org. I 
tried the -17 firmware from git.kernel.org with a
very similar result.

module was loaded with:

options iwlwifi power_save=0 bt_coex_active=0 swcrypto=1

The trace is accompanied by a couple seconds where no data transfer can happen 
(youtube stutters etc.), but other than that it seems
to resume fine. This happens every 2-15 minutes if I am moving data.

Disabling 11n fixes the problem, but that is not really an viable option.

Please let me know if there is anything I can add to help with the debugging.

> Apr 11 15:52:30  kernel: [13827.165868] iwlwifi :01:00.0: Queue 2 stuck 
> for 1 ms.
> Apr 11 15:52:30  kernel: [13827.165878] iwlwifi :01:00.0: Current SW 
> read_ptr 135 write_ptr 171
> Apr 11 15:52:30  kernel: [13827.165917] iwl data: : 00 00 00 00 00 00 
> 00 00 00 00 00 00 00 00 00 00  
> Apr 11 15:52:30  kernel: [13827.165928] iwlwifi :01:00.0: FH TRBs(0) = 
> 0x
> Apr 11 15:52:30  kernel: [13827.165940] iwlwifi :01:00.0: FH TRBs(1) = 
> 0xc0110003
> Apr 11 15:52:30  kernel: [13827.165951] iwlwifi :01:00.0: FH TRBs(2) = 
> 0x
> Apr 11 15:52:30  kernel: [13827.165962] iwlwifi :01:00.0: FH TRBs(3) = 
> 0x803f
> Apr 11 15:52:30  kernel: [13827.165973] iwlwifi :01:00.0: FH TRBs(4) = 
> 0x
> Apr 11 15:52:30  kernel: [13827.165985] iwlwifi :01:00.0: FH TRBs(5) = 
> 0x
> Apr 11 15:52:30  kernel: [13827.165996] iwlwifi :01:00.0: FH TRBs(6) = 
> 0x
> Apr 11 15:52:30  kernel: [13827.166007] iwlwifi :01:00.0: FH TRBs(7) = 
> 0x007090ed
> Apr 11 15:52:30  kernel: [13827.166056] iwlwifi :01:00.0: Q 0 is active 
> and mapped to fifo 3 ra_tid 0x [16,16]
> Apr 11 15:52:30  kernel: [13827.166104] iwlwifi :01:00.0: Q 1 is active 
> and mapped to fifo 2 ra_tid 0x [0,0]
> Apr 11 15:52:30  kernel: [13827.166151] iwlwifi :01:00.0: Q 2 is active 
> and mapped to fifo 1 ra_tid 0x [135,171]
> Apr 11 15:52:30  kernel: [13827.166199] iwlwifi :01:00.0: Q 3 is active 
> and mapped to fifo 0 ra_tid 0x [0,0]
> Apr 11 15:52:30  kernel: [13827.166247] iwlwifi :01:00.0: Q 4 is inactive 
> and mapped to fifo 0 ra_tid 0x [0,0]
> Apr 11 15:52:30  kernel: [13827.166295] iwlwifi :01:00.0: Q 5 is inactive 
> and mapped to fifo 0 ra_tid 0x [0,0]
> Apr 11 15:52:30  kernel: [13827.166343] iwlwifi :01:00.0: Q 6 is inactive 
> and mapped to fifo 0 ra_tid 0x [0,0]
> Apr 11 15:52:30  kernel: [13827.166391] iwlwifi :01:00.0: Q 7 is inactive 
> and mapped to fifo 0 ra_tid 0x [0,0]
> Apr 11 15:52:30  kernel: [13827.166439] iwlwifi :01:00.0: Q 8 is inactive 
> and mapped to fifo 0 ra_tid 0x [0,0]
> Apr 11 15:52:30  kernel: [13827.166487] iwlwifi :01:00.0: Q 9 is active 
> and mapped to fifo 7 ra_tid 0x [238,238]
> Apr 11 15:52:30  kernel: [13827.166535] iwlwifi :01:00.0: Q 10 is 
> inactive and mapped to fifo 0 ra_tid 0x [0,0]
> Apr 11 15:52:30  kernel: [13827.166583] iwlwifi :01:00.0: Q 11 is 
> inactive and mapped to fifo 0 ra_tid 0x [0,0]
> Apr 11 15:52:30  kernel: [13827.166631] iwlwifi :01:00.0: Q 12 is 
> inactive and mapped to fifo 0 ra_tid 0x [0,0]
> Apr 11 15:52:30  kernel: [13827.166679] iwlwifi :01:00.0: Q 13 is 
> inactive and mapped to fifo 0 ra_tid 0x [0,0]
> Apr 11 15:52:30  kernel: [13827.166727] iwlwifi :01:00.0: Q 14 is 
> inactive and mapped to fifo 0 ra_tid 0x [0,0]
> Apr 11 15:52:30  kernel: [13827.166930] iwlwifi :01:00.0: Q 15 is active 
> and mapped to fifo 5 ra_tid 0x [0,0]
> Apr 11 15:52:30  kernel: [13827.167155] iwlwifi :01:00.0: Q 16 is active 
> and mapped to fifo 1 ra_tid 0x000f [244,176]
> Apr 11 15:52:30  kernel: [13827.167204] iwlwifi :01:00.0: Q 17 is 
> inactive and mapped to fifo 0 ra_tid 0x [0,0]
> Apr 11 15:52:30  kernel: [13827.167254] iwlwifi :01:00.0: Q 18 is 
> inactive and mapped to fifo 0 ra_tid 0x [0,0]
> Apr 11 15:52:30  kernel: [13827.167328] iwlwifi :01:00.0: Q 19 is 
> inactive and mapped to fifo 0 ra_tid 0x [0,0]
> Apr 11 15:52:30  kernel: [13827.167381] iwlwifi :01:00.0: Q 20 is 
> inactive and mapped to fifo 0 ra_tid 0x [0,0]
> Apr 11 15:52:30  kernel: [13827.167444] iwlwifi :01:00.0: Q 21 is 
> inactive and mapped to fifo 0 ra_tid 0xfff0 [0,0]
> Apr 11 15:52:30  kernel: [13827.167551] iwlwifi :01:00.0: Q 22 is 
> inactive and mapped to fifo 0 ra_tid 0x [0,0]
> Apr 11 15:52:30  kernel: [13827.167612] iwlwifi :01:00.0: Q 23 is 
> inactive and mapped to fifo 0 ra_tid 0x [0,0]
> Apr 11 15:52:30  kernel: [13827.167720] iwlwifi :01:00.0: Q 24 is 
> inactive and mapped to fifo 0 ra_tid 0x [0,0]
> Apr 11 15:52:30  kernel: [13827.167781] iwlwifi :01:00.0: Q 25 is 
> inactive and mapped