iwlwifi broken in current -git

iwlwifi broken in current -git

[Jens Axboe]

Hi,

Just upgraded my laptop, and iwlwifi won't connect. Not specific to
the AP, tried a few and no go. Here are the dmesg from loading and
trying to connect, at some point it just gives up and asks me for
a password again. v5.4 works just fine.

The laptop is a gen7 x1 carbon.

[   43.426111] Intel(R) Wireless WiFi driver for Linux
[   43.426112] Copyright(c) 2003- 2015 Intel Corporation
[   43.428039] iwlwifi 0000:00:14.3: Found debug destination: EXTERNAL_DRAM
[   43.428040] iwlwifi 0000:00:14.3: Found debug configuration: 0
[   43.428222] iwlwifi 0000:00:14.3: loaded firmware version 46.6bf1df06.0 op_mode iwlmvm
[   43.491333] iwlwifi 0000:00:14.3: Detected Intel(R) Wireless-AC 9560 160MHz, REV=0x318
[   43.498760] iwlwifi 0000:00:14.3: Applying debug destination EXTERNAL_DRAM
[   43.498899] iwlwifi 0000:00:14.3: Allocated 0x00400000 bytes for firmware monitor.
[   43.541238] iwlwifi 0000:00:14.3: base HW address: dc:fb:48:b8:c6:b7
[   43.609556] ieee80211 phy1: Selected rate control algorithm 'iwl-mvm-rs'
[   43.610718] thermal thermal_zone6: failed to read out thermal zone (-61)
[   43.615027] iwlwifi 0000:00:14.3 wlp0s20f3: renamed from wlan0
[   43.730438] iwlwifi 0000:00:14.3: Applying debug destination EXTERNAL_DRAM
[   43.843856] iwlwifi 0000:00:14.3: Applying debug destination EXTERNAL_DRAM
[   43.909456] iwlwifi 0000:00:14.3: FW already configured (0) - re-configuring
[   47.273349] wlp0s20f3: authenticate with b6:fb:e4:19:db:06
[   47.279427] wlp0s20f3: send auth to b6:fb:e4:19:db:06 (try 1/3)
[   47.319107] wlp0s20f3: authenticated
[   47.328669] wlp0s20f3: associate with b6:fb:e4:19:db:06 (try 1/3)
[   47.332601] wlp0s20f3: RX AssocResp from b6:fb:e4:19:db:06 (capab=0x1011 status=0 aid=2)
[   47.334815] wlp0s20f3: associated
[   51.372005] wlp0s20f3: deauthenticated from b6:fb:e4:19:db:06 (Reason: 2=PREV_AUTH_NOT_VALID)
[   51.759486] wlp0s20f3: authenticate with fe:ec:da:39:00:eb
[   51.766866] wlp0s20f3: send auth to fe:ec:da:39:00:eb (try 1/3)
[   51.812724] wlp0s20f3: authenticated
[   51.818693] wlp0s20f3: associate with fe:ec:da:39:00:eb (try 1/3)
[   51.822934] wlp0s20f3: RX AssocResp from fe:ec:da:39:00:eb (capab=0x1411 status=0 aid=2)
[   51.825218] wlp0s20f3: associated
[   55.828019] wlp0s20f3: deauthenticated from fe:ec:da:39:00:eb (Reason: 2=PREV_AUTH_NOT_VALID)

-- 
Jens Axboe

Re: iwlwifi broken in current -git

[David Miller]

From: Jens Axboe <axboe@kernel.dk>
Date: Tue, 26 Nov 2019 14:04:01 -0700

> Just upgraded my laptop, and iwlwifi won't connect. Not specific to
> the AP, tried a few and no go. Here are the dmesg from loading and
> trying to connect, at some point it just gives up and asks me for
> a password again. v5.4 works just fine.

We know and are working on a fix, the iwlwifi driver does NAPI
completions improperly.

You can set /proc/sys/net/core/gro_normal_batch to '1' as a
temporary workaround.

Re: iwlwifi broken in current -git

[Jens Axboe]

On 11/26/19 2:16 PM, David Miller wrote:
> From: Jens Axboe <axboe@kernel.dk>
> Date: Tue, 26 Nov 2019 14:04:01 -0700
> 
>> Just upgraded my laptop, and iwlwifi won't connect. Not specific to
>> the AP, tried a few and no go. Here are the dmesg from loading and
>> trying to connect, at some point it just gives up and asks me for
>> a password again. v5.4 works just fine.
> 
> We know and are working on a fix, the iwlwifi driver does NAPI
> completions improperly.
> 
> You can set /proc/sys/net/core/gro_normal_batch to '1' as a
> temporary workaround.

Great thanks, that works for me.

-- 
Jens Axboe