I just moved from Buster to Bullseye updating the repos in sources.list / apt dist-upgrade / apt full-upgrade.
I don't know if it's the correct way to do that (I'm not very expertienced), but everything's seems to work just fine except for the wifi connection (eth connection works perfectly).
It seems that I can make small data exchange but nothing more.
Even with an apt update, the connection starts and, after a few seconds, it slows down and stops.
After it stops, sometimes I lost the connection, other times it starts to work (bad) again.
I've tried to:
disable ipv6 from /etc/sysctl.conf;
set country region with
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iw reg set
add
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options ath9k nohwcrypt=1 ps_enable=1 btcoex_enable=0
Here are some system information
My machine is an Asus N550JK
uname -r
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5.10.0-8-amd64
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*-network
description: Wireless interface
product: AR9485 Wireless Network Adapter
vendor: Qualcomm Atheros
physical id: 0
bus info: pci@0000:04:00.0
logical name: wlp4s0
version: 01
serial: 54:27:1e:1f:b3:99
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list rom ethernet physical wireless
configuration: broadcast=yes driver=ath9k driverversion=5.10.0-8-amd64 firmware=N/A ip=192.168.1.11 latency=0 link=yes multicast=yes wireless=IEEE 802.11
resources: irq:18 memory:f7900000-f797ffff memory:f7980000-f798ffff
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asus_nb_wmi 32768 0
asus_wmi 45056 1 asus_nb_wmi
sparse_keymap 16384 1 asus_wmi
rfkill 28672 8 asus_wmi,bluetooth,cfg80211
mxm_wmi 16384 1 nouveau
wmi 36864 3 asus_wmi,mxm_wmi,nouveau
video 53248 3 asus_wmi,i915,nouveau
battery 20480 1 asus_wmi
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[ 7435.932307] ath: phy0: DMA failed to stop in 10 ms AR_CR=0x00000024 AR_DIAG_SW=0x02000020 DMADBG_7=0x00006100
[ 7437.078003] wlp4s0: authenticate with e4:8f:34:d1:62:1c
[ 7437.097913] wlp4s0: send auth to e4:8f:34:d1:62:1c (try 1/3)
[ 7437.100478] wlp4s0: authenticated
[ 7437.104207] wlp4s0: associate with e4:8f:34:d1:62:1c (try 1/3)
[ 7437.108314] wlp4s0: RX AssocResp from e4:8f:34:d1:62:1c (capab=0x1411 status=0 aid=1)
[ 7437.108475] wlp4s0: associated
[ 7437.108772] ath: EEPROM regdomain: 0x817c
[ 7437.108777] ath: EEPROM indicates we should expect a country code
[ 7437.108780] ath: doing EEPROM country->regdmn map search
[ 7437.108783] ath: country maps to regdmn code: 0x37
[ 7437.108787] ath: Country alpha2 being used: IT
[ 7437.108791] ath: Regpair used: 0x37
[ 7437.108795] ath: regdomain 0x817c dynamically updated by country element
[ 7437.176174] wlp4s0: Limiting TX power to 20 (20 - 0) dBm as advertised by e4:8f:34:d1:62:1c