Comment 3 for bug 1743489

I have a similar situation: wifi will randomly disappear. Some bits from the logs:

Jul 31 09:20:38 bonobo kernel: [162551.133513] iwlwifi 0000:04:00.0: fail to flush all tx fifo queues Q 5
Jul 31 09:20:38 bonobo kernel: [162551.204513] iwlwifi 0000:04:00.0: Queue 5 is active on fifo 2 and stuck for 10000 ms. SW [63, 64] HW [90, 90] FH TRB=0x05a5a5a5a
Jul 31 09:20:38 bonobo kernel: [162551.222152] iwlwifi 0000:04:00.0: Failed to wake NIC for hcmd
Jul 31 09:20:38 bonobo kernel: [162551.222166] iwlwifi 0000:04:00.0: Error sending ADD_STA: enqueue_hcmd failed: -5
Jul 31 09:20:38 bonobo kernel: [162551.222169] wlan0: HW problem - can not stop rx aggregation for 92:2a:a8:15:18:81 tid 0
ul 31 09:20:38 bonobo kernel: [162551.239878] iwlwifi 0000:04:00.0: Failed to wake NIC for hcmd
Jul 31 09:20:38 bonobo kernel: [162551.239891] iwlwifi 0000:04:00.0: Error sending ADD_STA: enqueue_hcmd failed: -5
Jul 31 09:20:38 bonobo kernel: [162551.239894] wlan0: HW problem - can not stop rx aggregation for 92:2a:a8:15:18:81 tid 1
Jul 31 09:20:38 bonobo kernel: [162551.257561] iwlwifi 0000:04:00.0: Failed to wake NIC for hcmd
Jul 31 09:20:38 bonobo kernel: [162551.257571] iwlwifi 0000:04:00.0: Error sending ADD_STA: enqueue_hcmd failed: -5
Jul 31 09:20:38 bonobo kernel: [162551.257573] wlan0: HW problem - can not stop rx aggregation for 92:2a:a8:15:18:81 tid 5
Jul 31 09:20:38 bonobo kernel: [162551.275226] iwlwifi 0000:04:00.0: Failed to wake NIC for hcmd
Jul 31 09:20:38 bonobo kernel: [162551.275250] iwlwifi 0000:04:00.0: Error sending ADD_STA: enqueue_hcmd failed: -5