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Re: ath wireless power management failure


From: Ludovic Courtès
Subject: Re: ath wireless power management failure
Date: Tue, 07 Feb 2017 15:46:25 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/25.1 (gnu/linux)

Hello!

Ricardo Wurmus <address@hidden> skribis:

> The error messages that appear in the log look like this:
>
> [ 1210.998408] ath: phy0: Unable to reset channel, reset status -22
> [ 1211.078027] ath: phy0: DMA failed to stop in 10 ms AR_CR=0xffffffff 
> AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
> [ 1211.078038] ath: phy0: Could not stop RX, we could be confusing the DMA 
> engine when we start RX up
>
> (Repeat ad infinitum.)

I see some of these in /var/log/messages (using Linux-libre 4.9, on a
UEFI laptop) but it’s only a couple of times, after which things get
reinitialized:

--8<---------------cut here---------------start------------->8---
[ 4880.470147] ath: phy2: Unable to reset channel (2437 Mhz) reset status -22
[ 4880.470149] ath: phy2: Unable to set channel
[ 4880.480214] ath: phy2: Failed to wakeup in 500us
[ 4880.490224] ath: phy2: Failed to wakeup in 500us

[...]

[ 4880.670796] usb 1-2: ath9k_htc: USB layer deinitialized
[ 4881.414783] usb 1-2: new high-speed USB device number 13 using xhci_hcd
[ 4881.631641] usb 1-2: New USB device found, idVendor=0cf3, idProduct=9271
[ 4881.631643] usb 1-2: New USB device strings: Mfr=16, Product=32, 
SerialNumber=48
[ 4881.631644] usb 1-2: Product: UB93
[ 4881.631645] usb 1-2: Manufacturer: ATHEROS
[ 4881.631646] usb 1-2: SerialNumber: 12345
[ 4881.632165] usb 1-2: ath9k_htc: Firmware ath9k_htc/htc_9271-1.4.0.fw 
requested
[ 4881.632281] usb 1-2: Direct firmware load for ath9k_htc/htc_9271-1.4.0.fw 
failed with error -2
[ 4881.632284] usb 1-2: ath9k_htc: Firmware htc_9271.fw requested
]: Deleting interface #7 wlp0s20f0u2, fe80::6202:b4ff:fe99:9b31%5#123, 
interface stats: received=0, sent=0, dropped=0, active_time=8 secs
[ 4881.919163] usb 1-2: ath9k_htc: Transferred FW: htc_9271.fw, size: 51008
[ 4882.171184] ath9k_htc 1-2:1.0: ath9k_htc: HTC initialized with 33 credits
[ 4882.440251] ath9k_htc 1-2:1.0: ath9k_htc: FW Version: 1.4
[ 4882.440254] ath9k_htc 1-2:1.0: FW RMW support: On
[ 4882.444769] ieee80211 phy3: Atheros AR9271 Rev:1
[ 4882.444890] ath9k_htc 1-2:1.0 wlp0s20f0u2: renamed from wlan0
--8<---------------cut here---------------end--------------->8---

So I don’t know what’s happening in your case.  It’s a good idea to try
with a different WiFi card or dongle if you have one.

Ludo’.



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