[SOLVED] Wifi adapter driver failing to read register

temporaryusername · 2026-01-13 05:22:34

Hello, I recently installed Arch Linux following the install guide and I was wondering if I should be worried about the following messages that appear occasionally:

[ 3997.176476] rtw88_8822bu 2-5:1.0: read register 0x604 failed with -110
[ 6143.160648] rtw88_8822bu 2-5:1.0: read register 0x604 failed with -110
[ 9047.160815] rtw88_8822bu 2-5:1.0: read register 0x604 failed with -110

My wifi adapter is the TP-Link Archer T3U Plus which the TP-Link support says isn't supported on Linux, so I was going to use ndiswrapper based on the Network Configuration page, but it seems that my wifi is working fine without the driver since I can ping archlinux.org fine.

Last edited by temporaryusername (2026-01-14 01:17:00)

seth · 2026-01-13 09:07:57

110 is a timeout
Check the system journal for the context where this occurs, could eg. be related to S3 cycles or (suspend/wake) or for a usb device also a consequence of usb autosuspend (for powersaving - and then it takes a bit longer to wake up)

temporaryusername · 2026-01-14 01:16:43

For some reason I'm not having any more read register failures since unplugging and replugging my adapter when I initially posted this.

Here is some journalctl logs surrounding read register cases:

wpa_supplicant[707]: TDLS: Invalid frame - payloadtype=1 category =240 action=26
wpa_supplicant[707]: wlp1s0f0u5: CTRL-EVENT-SIGNAL-CHANGE above=0 signal=-72 noise=9999 txrate=175600
wpa_supplicant[707]: wlp1s0f0u5: CTRL-EVENT-SIGNAL-CHANGE above=1 signal=-70 noise=9999 txrate=175600
kernel rtw88_8822bu 2-5:1.0: read register 0x604 failed with -110
wpa_supplicant[707]: wlp1s0f0u5: RSN: Group rekeying completed with 86:2a:a8:c5:3f:45 [GTK=CCMP]
wpa_supplicant[707]: TDLS: Invalid frame - payloadtype=1 category =240 action=26
kernel rtw88_8822bu 2-5:1.0: read register 0x604 failed with -110
wpa_supplicant[707]: TDLS: Invalid frame - payloadtype=1 category =240 action=26
wpa_supplicant[707]: wlp1s0f0u5: RSN: Group rekeying completed with 86:2a:a8:c5:3f:45 [GTK=CCMP]
wpa_supplicant[707]: wlp1s0f0u5: CTRL-EVENT-SIGNAL-CHANGE above=0 signal=-73 noise=9999 txrate=175600
wpa_supplicant[707]: wlp1s0f0u5: CTRL-EVENT-SIGNAL-CHANGE above=1 signal=-69 noise=9999 txrate=175600
wpa_supplicant[707]: TDLS: Invalid frame - payloadtype=1 category =240 action=26

Since I still get TDLS and group rekeying messages with the read register failure, I'm assuming the offending lines are the CTRL-EVENT-SIGNAL-CHANGE's, which based on other forum posts, may be a recurring suspending feature like you said.

Now that I'm not getting the failure anymore I'm going to mark this post as solved for now, thank you very much for leading me to the system journal.

seth · 2026-01-14 10:36:56

since unplugging and replugging my adapter

It's more likely there was a loose connection (physically or electrically) then.

Arch Linux

#1 2026-01-13 05:22:34

[SOLVED] Wifi adapter driver failing to read register

#2 2026-01-13 09:07:57

Re: [SOLVED] Wifi adapter driver failing to read register

#3 2026-01-14 01:16:43

Re: [SOLVED] Wifi adapter driver failing to read register

#4 2026-01-14 10:36:56

Re: [SOLVED] Wifi adapter driver failing to read register

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