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big_A

Member

Registered: 2019-09-15

Posts: 5

Unstable WiFi random disconnects T490 Intel Wireless-AC 9560 iwlwifi

Dear Ladies and Gentlemen,

I've been using the Lenovo T490 with Arch for the past six months. Unfortunately, all this time, I was unable to get WiFi working reliably. I had been hoping for a kernel / firmware update to fix my issue but I had no luck so far.
I am currently on Linux 5.5.3, but the error was existing with all previous versions I've used. I get the same error on Manjaro and Ubuntu Live Systems, which makes me believe that it must be a firmware bug. No problems in Windows though.

Some WiFis work flawlessly (Work, iPhone Hotspot). Others (Android Hotspot), I can sometimes connect to, then it disconnects after 5 to 10 minutes. After the first disconnect I'm usually unable to reconnect. When disconnecting from the Android Hotspot, KDE asks me for the password three times, but is unable to maintain the connection in spite of the right passphrase entered. Then there are networks, I can't connect to at all (Home router).

I already tried to tinker with the regdom as another user on the web suggested, but without success.

Arch Wiki states, that the WiFi on T490 is working fine and links to an already fixed bug.

I was wondering if I am right in assuming that this is a firmware/kernel issue? I find it hard to believe that I'm the only one having this problem since the T490 is a relatively common device and I was able to replicate the error with various distributions.

I am eager to hear if there is someone facing similar issues.

Best regards.

Here are the dmesg outputs I get.

[ 7000.489502] iwlwifi 0000:00:14.3: No beacon heard and the time event is over already...
[ 7000.489527] wlp0s20f3: Connection to AP XX:XX:XX:XX:XX:XX lost
[ 7000.730593] wlp0s20f3: authentication with XX:XX:XX:XX:XX:XX timed out
[ 7010.982261] iwlwifi 0000:00:14.3: Unhandled alg: 0x71b
[ 7010.985531] iwlwifi 0000:00:14.3: Unhandled alg: 0x71b
[ 7010.995991] iwlwifi 0000:00:14.3: Unhandled alg: 0x71b
[ 7010.997651] iwlwifi 0000:00:14.3: Unhandled alg: 0x71b
[ 7011.000284] iwlwifi 0000:00:14.3: Unhandled alg: 0x71b
[ 7011.003074] iwlwifi 0000:00:14.3: Unhandled alg: 0x71b

[ 6973.692847] iwlwifi 0000:00:14.3: Applying debug destination EXTERNAL_DRAM
[ 6973.810899] iwlwifi 0000:00:14.3: Applying debug destination EXTERNAL_DRAM
[ 6973.884593] iwlwifi 0000:00:14.3: FW already configured (0) - re-configuring
[ 6973.899036] iwlwifi 0000:00:14.3: BIOS contains WGDS but no WRDS

[   35.963721] wlp0s20f3: deauthenticating from XX:XX:XX:XX:XX:XX by local choice (Reason: 3=DEAUTH_LEAVING)
[   37.967579] iwlwifi 0000:00:14.3: fail to flush all tx fifo queues Q 5
[   37.967648] iwlwifi 0000:00:14.3: Queue 5 is active on fifo 3 and stuck for 10000 ms. SW [3, 4] HW [3, 4] FH TRB=0x0c0304002

[  112.677661] iwlwifi 0000:00:14.3: Queue 10 is active on fifo 1 and stuck for 10000 ms. SW [6, 24] HW [6, 24] FH TRB=0x0c010a005
[  112.677824] iwlwifi 0000:00:14.3: Microcode SW error detected. Restarting 0x0.
[  112.677937] iwlwifi 0000:00:14.3: Start IWL Error Log Dump:
[  112.677942] iwlwifi 0000:00:14.3: Status: 0x00000040, count: 6
[  112.677945] iwlwifi 0000:00:14.3: Loaded firmware version: 46.ceaaecdc.0
[  112.677950] iwlwifi 0000:00:14.3: 0x00000084 | NMI_INTERRUPT_UNKNOWN       
[  112.677953] iwlwifi 0000:00:14.3: 0x000022F0 | trm_hw_status0
[  112.677956] iwlwifi 0000:00:14.3: 0x00000000 | trm_hw_status1
[  112.677959] iwlwifi 0000:00:14.3: 0x004886E6 | branchlink2
[  112.677961] iwlwifi 0000:00:14.3: 0x00479396 | interruptlink1
[  112.677964] iwlwifi 0000:00:14.3: 0x00479396 | interruptlink2
[  112.677967] iwlwifi 0000:00:14.3: 0x0001114A | data1
[  112.677970] iwlwifi 0000:00:14.3: 0xFF000000 | data2
[  112.677973] iwlwifi 0000:00:14.3: 0xF0000008 | data3
[  112.677977] iwlwifi 0000:00:14.3: 0x1A404B1B | beacon time
[  112.677980] iwlwifi 0000:00:14.3: 0x57811368 | tsf low
[  112.677983] iwlwifi 0000:00:14.3: 0x00000003 | tsf hi
[  112.677986] iwlwifi 0000:00:14.3: 0x00000000 | time gp1
[  112.677989] iwlwifi 0000:00:14.3: 0x02708420 | time gp2
[  112.677992] iwlwifi 0000:00:14.3: 0x00000001 | uCode revision type
[  112.677995] iwlwifi 0000:00:14.3: 0x0000002E | uCode version major
[  112.677998] iwlwifi 0000:00:14.3: 0xCEAAECDC | uCode version minor
[  112.678001] iwlwifi 0000:00:14.3: 0x00000312 | hw version
[  112.678004] iwlwifi 0000:00:14.3: 0x00C89008 | board version
[  112.678007] iwlwifi 0000:00:14.3: 0x00D2019C | hcmd
[  112.678010] iwlwifi 0000:00:14.3: 0x00022000 | isr0
[  112.678013] iwlwifi 0000:00:14.3: 0x00000000 | isr1
[  112.678016] iwlwifi 0000:00:14.3: 0x08001802 | isr2
[  112.678019] iwlwifi 0000:00:14.3: 0x004154C0 | isr3
[  112.678022] iwlwifi 0000:00:14.3: 0x00000000 | isr4
[  112.678025] iwlwifi 0000:00:14.3: 0x82EB009D | last cmd Id
[  112.678028] iwlwifi 0000:00:14.3: 0x0001114A | wait_event
[  112.678031] iwlwifi 0000:00:14.3: 0x00000080 | l2p_control
[  112.678034] iwlwifi 0000:00:14.3: 0x00000020 | l2p_duration
[  112.678037] iwlwifi 0000:00:14.3: 0x0000003F | l2p_mhvalid
[  112.678039] iwlwifi 0000:00:14.3: 0x000000CE | l2p_addr_match
[  112.678042] iwlwifi 0000:00:14.3: 0x0000000D | lmpm_pmg_sel
[  112.678045] iwlwifi 0000:00:14.3: 0x20111546 | timestamp
[  112.678048] iwlwifi 0000:00:14.3: 0x000048BC | flow_handler
[  112.678100] iwlwifi 0000:00:14.3: Start IWL Error Log Dump:
[  112.678103] iwlwifi 0000:00:14.3: Status: 0x00000040, count: 7
[  112.678107] iwlwifi 0000:00:14.3: 0x20000066 | NMI_INTERRUPT_HOST
[  112.678110] iwlwifi 0000:00:14.3: 0x00000000 | umac branchlink1
[  112.678113] iwlwifi 0000:00:14.3: 0xC008890A | umac branchlink2
[  112.678116] iwlwifi 0000:00:14.3: 0xC0084418 | umac interruptlink1
[  112.678118] iwlwifi 0000:00:14.3: 0xC0084418 | umac interruptlink2
[  112.678121] iwlwifi 0000:00:14.3: 0x01000000 | umac data1
[  112.678124] iwlwifi 0000:00:14.3: 0xC0084418 | umac data2
[  112.678126] iwlwifi 0000:00:14.3: 0xDEADBEEF | umac data3
[  112.678129] iwlwifi 0000:00:14.3: 0x0000002E | umac major
[  112.678132] iwlwifi 0000:00:14.3: 0xCEAAECDC | umac minor
[  112.678134] iwlwifi 0000:00:14.3: 0x0270840C | frame pointer
[  112.678137] iwlwifi 0000:00:14.3: 0xC088627C | stack pointer
[  112.678140] iwlwifi 0000:00:14.3: 0x00D2019C | last host cmd
[  112.678142] iwlwifi 0000:00:14.3: 0x00000000 | isr status reg
[  112.678161] iwlwifi 0000:00:14.3: Fseq Registers:
[  112.678169] iwlwifi 0000:00:14.3: 0x9CA93350 | FSEQ_ERROR_CODE
[  112.678178] iwlwifi 0000:00:14.3: 0x00000000 | FSEQ_TOP_INIT_VERSION
[  112.678187] iwlwifi 0000:00:14.3: 0x5FE35616 | FSEQ_CNVIO_INIT_VERSION
[  112.678196] iwlwifi 0000:00:14.3: 0x0000A384 | FSEQ_OTP_VERSION
[  112.678205] iwlwifi 0000:00:14.3: 0x96761192 | FSEQ_TOP_CONTENT_VERSION
[  112.678214] iwlwifi 0000:00:14.3: 0x4FB31D54 | FSEQ_ALIVE_TOKEN
[  112.678222] iwlwifi 0000:00:14.3: 0x564C8180 | FSEQ_CNVI_ID
[  112.678230] iwlwifi 0000:00:14.3: 0x9B53539A | FSEQ_CNVR_ID
[  112.678239] iwlwifi 0000:00:14.3: 0x01000100 | CNVI_AUX_MISC_CHIP
[  112.678249] iwlwifi 0000:00:14.3: 0x01300202 | CNVR_AUX_MISC_CHIP
[  112.678260] iwlwifi 0000:00:14.3: 0x0000485B | CNVR_SCU_SD_REGS_SD_REG_DIG_DCDC_VTRIM
[  112.678302] iwlwifi 0000:00:14.3: 0xA5A5A5A2 | CNVR_SCU_SD_REGS_SD_REG_ACTIVE_VDIG_MIRROR
[  112.678315] iwlwifi 0000:00:14.3: Collecting data: trigger 2 fired.

EDIT:

Seems like there are Bug reports similar to mine.
Bug 206239 - [iwlwifi] Firmware error during reconfiguration
Bug 204233 - iwlwifi: Microcode SW error detected 

EDIT 2: The bug seems to be fixed in kernel 5.6.14, possibly a few versions below. Worked for a day, then started getting dmesg errors again.

[16668.533681] iwlwifi 0000:00:14.3: fail to flush all tx fifo queues Q 5
[16668.533749] iwlwifi 0000:00:14.3: Queue 5 is active on fifo 3 and stuck for 10000 ms. SW [3, 4] HW [3, 4] FH TRB=0x080305002

Last edited by big_A (2020-05-27 10:39:51)

loqs

Member

Registered: 2014-03-06

Posts: 17,321

Re: Unstable WiFi random disconnects T490 Intel Wireless-AC 9560 iwlwifi

You are still getting the following using 5.5.3.arch1-1 ?

[  112.677950] iwlwifi 0000:00:14.3: 0x00000084 | NMI_INTERRUPT_UNKNOWN       

big_A

Member

Registered: 2019-09-15

Posts: 5

Re: Unstable WiFi random disconnects T490 Intel Wireless-AC 9560 iwlwifi

Hello loqs, thank you for your reply.

I just tried again and I can confirm that I get that error with my Android Hotspot.
This is the output of "uname -a"

Linux T490 5.5.3-arch1-1 #1 SMP PREEMPT Tue, 11 Feb 2020 15:35:41 +0000 x86_64 GNU/Linux

"dmesg | grep INTERRUPT" gives me this

[  202.704647] iwlwifi 0000:00:14.3: 0x20000066 | NMI_INTERRUPT_HOST
[  207.598408] iwlwifi 0000:00:14.3: 0x20000070 | NMI_INTERRUPT_LMAC_FATAL
[  208.416782] iwlwifi 0000:00:14.3: 0x20000070 | NMI_INTERRUPT_LMAC_FATAL
[  221.262739] iwlwifi 0000:00:14.3: 0x00000084 | NMI_INTERRUPT_UNKNOWN       
[  221.263088] iwlwifi 0000:00:14.3: 0x20000066 | NMI_INTERRUPT_HOST
[  228.896940] iwlwifi 0000:00:14.3: 0x20000070 | NMI_INTERRUPT_LMAC_FATAL
[  229.818138] iwlwifi 0000:00:14.3: 0x20000070 | NMI_INTERRUPT_LMAC_FATAL
[  246.221978] iwlwifi 0000:00:14.3: 0x00000084 | NMI_INTERRUPT_UNKNOWN       
[  246.222284] iwlwifi 0000:00:14.3: 0x20000066 | NMI_INTERRUPT_HOST
[  247.226620] iwlwifi 0000:00:14.3: 0x20000070 | NMI_INTERRUPT_LMAC_FATAL
[  247.943260] iwlwifi 0000:00:14.3: 0x20000070 | NMI_INTERRUPT_LMAC_FATAL
[  268.621733] iwlwifi 0000:00:14.3: 0x00000084 | NMI_INTERRUPT_UNKNOWN       
[  268.622036] iwlwifi 0000:00:14.3: 0x20000066 | NMI_INTERRUPT_HOST
[  275.796331] iwlwifi 0000:00:14.3: 0x20000070 | NMI_INTERRUPT_LMAC_FATAL

Best regards

Last edited by big_A (2020-02-15 10:20:39)

Head_on_a_Stick

Member

From: London

Registered: 2014-02-20

Posts: 7,732

Website

Re: Unstable WiFi random disconnects T490 Intel Wireless-AC 9560 iwlwifi

Have you tried https://wiki.archlinux.org/index.php/Ne … ss#iwlwifi? How about the (new) LTS kernel?

---

Are you infected with Wetiko?

big_A

Member

Registered: 2019-09-15

Posts: 5

Re: Unstable WiFi random disconnects T490 Intel Wireless-AC 9560 iwlwifi

I've encountered additional dmesg error messages with a new WiFi Access Point. This is with 5.5.6 Arch. I keep you updated if anything changes or I find a solution.
Thanks for the support!

[21141.189129] iwlwifi 0000:00:14.3: expected hw-decrypted unicast frame for station
[21141.189136] iwlwifi 0000:00:14.3: expected hw-decrypted unicast frame for station
[21141.189143] iwlwifi 0000:00:14.3: expected hw-decrypted unicast frame for station
[21141.189147] iwlwifi 0000:00:14.3: expected hw-decrypted unicast frame for station
[21141.189153] iwlwifi 0000:00:14.3: expected hw-decrypted unicast frame for station
[21141.189156] iwlwifi 0000:00:14.3: expected hw-decrypted unicast frame for station
[21141.189162] iwlwifi 0000:00:14.3: expected hw-decrypted unicast frame for station
[21141.189166] iwlwifi 0000:00:14.3: expected hw-decrypted unicast frame for station
[21141.189171] iwlwifi 0000:00:14.3: expected hw-decrypted unicast frame for station
[21141.189175] iwlwifi 0000:00:14.3: expected hw-decrypted unicast frame for station
[21141.189182] iwlwifi 0000:00:14.3: expected hw-decrypted unicast frame for station
[21141.189186] iwlwifi 0000:00:14.3: expected hw-decrypted unicast frame for station
[21141.189192] iwlwifi 0000:00:14.3: expected hw-decrypted unicast frame for station
[21141.189196] iwlwifi 0000:00:14.3: expected hw-decrypted unicast frame for station
[21141.189207] iwlwifi 0000:00:14.3: expected hw-decrypted unicast frame for station
[21141.189211] iwlwifi 0000:00:14.3: expected hw-decrypted unicast frame for station
[21141.189216] iwlwifi 0000:00:14.3: expected hw-decrypted unicast frame for station
[21141.189220] iwlwifi 0000:00:14.3: expected hw-decrypted unicast frame for station
[21141.204198] iwlwifi 0000:00:14.3: Unhandled alg: 0x707

FallenSnow

Member

Registered: 2014-04-07

Posts: 39

Re: Unstable WiFi random disconnects T490 Intel Wireless-AC 9560 iwlwifi

I'm also running into the

iwlwifi 0000:3b:00.0: expected hw-decrypted unicast frame for station

issue. I'm on 5.11.2. Did you find a solution?

big_A

Member

Registered: 2019-09-15

Posts: 5

Re: Unstable WiFi random disconnects T490 Intel Wireless-AC 9560 iwlwifi

I'm also running into the

iwlwifi 0000:3b:00.0: expected hw-decrypted unicast frame for station

issue. I'm on 5.11.2. Did you find a solution?

The dmesg messages disappeared over the course of the updates, the wifi connection is still sometimes lost, then I just reconnect. I can sometimes prevent loss of connection by running a ping command in the background.

Jason P.

Member

Registered: 2015-02-26

Posts: 171

Re: Unstable WiFi random disconnects T490 Intel Wireless-AC 9560 iwlwifi

I'm having the exact same problem. WiFi drops completeley and I can see many of these messages on the logs:

iwlwifi 0000:3b:00.0: expected hw-decrypted unicast frame for station

What I discovered is that almost in any case, this problem happens during Zoom calls, specially when other computer on the same WiFi network joins a Teams meeting. Before, both computers can have simultaneous calls without issues (mostly).

Device: Wi-Fi 6 AX 200

Last edited by Jason P. (2021-03-05 16:56:12)

FallenSnow

Member

Registered: 2014-04-07

Posts: 39

Re: Unstable WiFi random disconnects T490 Intel Wireless-AC 9560 iwlwifi

I have a Killer 1650 AX200 which I saw many people have this issue with. So I bought a AX210 (Intel Corporation Device 2725 (rev 1a)) today to replace it. Unfortunately it too has the same issue.

I've tried updating the firmware to the latest firmware using linux-firmware-git but still having the same issue. I've also tried setting my AP's beacon interval to 50, no dice.

I get this issue every time I run a speed test of my wifi. Otherwise it happens 4 -5 times a day.

Last edited by FallenSnow (2021-03-06 04:04:42)

Jason P.

Member

Registered: 2015-02-26

Posts: 171

Re: Unstable WiFi random disconnects T490 Intel Wireless-AC 9560 iwlwifi

I've noticed that running a ping command after it happens does make reconnection faster.

vogu66

Member

Registered: 2020-05-09

Posts: 5

Re: Unstable WiFi random disconnects T490 Intel Wireless-AC 9560 iwlwifi

I have access to wifi in  different places, and only one out of 4 have the same problem, so it may help pinpoint the problem, but I'm not sure what to look for really

Device: Intel Killer Wi-Fi 6 AX1650i

rellieberman

Member

Registered: 2018-11-19

Posts: 13

Re: Unstable WiFi random disconnects T490 Intel Wireless-AC 9560 iwlwifi

Got the same problem on a t14,
Enabling software encryption and disabling 802.11n by adding this line to /etc/modprobe.d/iwlwifi.conf :

options iwlwifi 11n_disable=1 swcrypto=1

seems to stop the disconnects and stabilize the connection.

https://wiki.archlinux.org/index.php/Ne … ss#iwlwifi

Last edited by rellieberman (2021-03-29 22:59:48)