I've been having network performance issues in Ubuntu since installation.
Wireless Network Card
Looking at the output, I noticed that the network adapter is only connecting to the channel with width 20 MHz.Code:~$ lspci | grep "Network" 29:00.0 Network controller: Intel Corporation Dual Band Wireless-AC 3168NGW [Stone Peak] (rev 10)
I confirmed that the network AP seems to be setup correctly. Other Ubuntu devices are connecting properly using full available width (although with different wireless adapters).Code:~$ iw dev wlp41s0 info Interface wlp41s0 ifindex 3 wdev 0x1 addr 98:8d:46:5a:16:34 ssid home-wifi type managed wiphy 0 channel 44 (5220 MHz), width: 20 MHz (no HT), center1: 5220 MHz txpower 22.00 dBm multicast TXQ: qsz-byt qsz-pkt flows drops marks overlmt hashcol tx-bytes tx-packets 0 0 0 0 0 0 0 0 0
Interestingly enough, even though I am in the US, iwlist reports frequencies that shouldn't be available by regulation.Code:~$ sudo iw dev wlp41s0 scan ssid BSS cc:ab:2c:db:be:c9(on wlp41s0) -- associated last seen: 2739.005s [boottime] TSF: 3259641347 usec (0d, 00:54:19) freq: 5220 beacon interval: 100 TUs capability: ESS Privacy SpectrumMgmt (0x0111) signal: -44.00 dBm last seen: 1136 ms ago Information elements from Probe Response frame: SSID: home-wifi Supported rates: 6.0* 9.0 12.0 18.0 24.0* 36.0 48.0 54.0 Country: US Environment: Indoor/Outdoor Channels [36 - 36] @ 30 dBm Channels [40 - 40] @ 30 dBm Channels [44 - 44] @ 30 dBm Channels [48 - 48] @ 30 dBm Channels [52 - 52] @ 24 dBm Channels [56 - 56] @ 24 dBm Channels [60 - 60] @ 24 dBm Channels [64 - 64] @ 24 dBm Channels [100 - 100] @ 24 dBm Channels [104 - 104] @ 24 dBm Channels [108 - 108] @ 24 dBm Channels [112 - 112] @ 24 dBm Channels [116 - 116] @ 24 dBm Channels [120 - 120] @ 24 dBm Channels [124 - 124] @ 24 dBm Channels [128 - 128] @ 24 dBm Channels [132 - 132] @ 24 dBm Channels [136 - 136] @ 24 dBm Channels [140 - 140] @ 24 dBm Channels [144 - 144] @ 24 dBm Channels [149 - 149] @ 30 dBm Channels [153 - 153] @ 30 dBm Channels [157 - 157] @ 30 dBm Channels [161 - 161] @ 30 dBm Channels [165 - 165] @ 30 dBm Power constraint: 0 dB TPC report: TX power: 22 dBm RSN: * Version: 1 * Group cipher: CCMP * Pairwise ciphers: CCMP * Authentication suites: PSK * Capabilities: 16-PTKSA-RC 1-GTKSA-RC (0x000c) BSS Load: * station count: 3 * channel utilisation: 16/255 * available admission capacity: 0 [*32us] HT capabilities: Capabilities: 0x1ef RX LDPC HT20/HT40 SM Power Save disabled RX HT20 SGI RX HT40 SGI TX STBC RX STBC 1-stream Max AMSDU length: 3839 bytes No DSSS/CCK HT40 Maximum RX AMPDU length 65535 bytes (exponent: 0x003) Minimum RX AMPDU time spacing: 4 usec (0x05) HT RX MCS rate indexes supported: 0-31 HT TX MCS rate indexes are undefined HT operation: * primary channel: 44 * secondary channel offset: above * STA channel width: any * RIFS: 0 * HT protection: non-HT mixed * non-GF present: 1 * OBSS non-GF present: 1 * dual beacon: 0 * dual CTS protection: 0 * STBC beacon: 0 * L-SIG TXOP Prot: 0 * PCO active: 0 * PCO phase: 0 Extended capabilities: * Extended Channel Switching * BSS Transition * Interworking * QoS Map * Operating Mode Notification * Channel Schedule Management * Channel Schedule Management * 6 * Max Number Of MSDUs In A-MSDU is VHT capabilities: VHT Capabilities (0x0f8b69f5): Max MPDU length: 7991 Supported Channel Width: 160 MHz RX LDPC short GI (80 MHz) short GI (160/80+80 MHz) TX STBC SU Beamformer MU Beamformer VHT RX MCS set: 1 streams: MCS 0-9 2 streams: MCS 0-9 3 streams: MCS 0-9 4 streams: MCS 0-9 5 streams: not supported 6 streams: not supported 7 streams: not supported 8 streams: not supported VHT RX highest supported: 0 Mbps VHT TX MCS set: 1 streams: MCS 0-9 2 streams: MCS 0-9 3 streams: MCS 0-9 4 streams: MCS 0-9 5 streams: not supported 6 streams: not supported 7 streams: not supported 8 streams: not supported VHT TX highest supported: 0 Mbps VHT operation: * channel width: 1 (80 MHz) * center freq segment 1: 42 * center freq segment 2: 50 * VHT basic MCS set: 0x0000 WPS: * Version: 1.0 * Wi-Fi Protected Setup State: 2 (Configured) * Response Type: 3 (AP) * UUID: * Manufacturer: Arris, Inc. * Model: BGW320-500 * Model Number: BGW320-500 * Serial Number: BGW320-500 * Primary Device Type: 6-0050f204-1 * Device name: Arris Wireless * Config methods: Display, Keypad * RF Bands: 0x3 * Unknown TLV (0x1049, 6 bytes): 00 37 2a 00 01 20 WMM: * Parameter version 1 * u-APSD * BE: CW 15-1023, AIFSN 3 * BK: CW 15-1023, AIFSN 7 * VI: CW 7-15, AIFSN 2, TXOP 3008 usec * VO: CW 3-7, AIFSN 2, TXOP 1504 usec 802.11u Advertisement: Query Response Info: 0x7f Query Response Length Limit: 127 ANQP
In /etc/default/crda, I set regdomain to US to try and make sure that the adapter is set to operate in the correct region, but didn't seem to change the above. I could not confirm from dmesg that the crda change was effective.Code:~$ iwlist wlp41s0 freq wlp41s0 32 channels in total; available frequencies : Channel 01 : 2.412 GHz Channel 02 : 2.417 GHz Channel 03 : 2.422 GHz Channel 04 : 2.427 GHz Channel 05 : 2.432 GHz Channel 06 : 2.437 GHz Channel 07 : 2.442 GHz Channel 08 : 2.447 GHz Channel 09 : 2.452 GHz Channel 10 : 2.457 GHz Channel 11 : 2.462 GHz Channel 12 : 2.467 GHz Channel 13 : 2.472 GHz Channel 36 : 5.18 GHz Channel 40 : 5.2 GHz Channel 44 : 5.22 GHz Channel 48 : 5.24 GHz Channel 52 : 5.26 GHz Channel 56 : 5.28 GHz Channel 60 : 5.3 GHz Channel 64 : 5.32 GHz Channel 100 : 5.5 GHz Channel 104 : 5.52 GHz Channel 108 : 5.54 GHz Channel 112 : 5.56 GHz Channel 116 : 5.58 GHz Channel 120 : 5.6 GHz Channel 124 : 5.62 GHz Channel 128 : 5.64 GHz Channel 132 : 5.66 GHz Channel 136 : 5.68 GHz Channel 140 : 5.7 GHz Current Frequency:5.22 GHz (Channel 44)
I also tried to set the frequency manually, but get a reply that the channel is disabled, making me believe that the region is incorrect still.Code:REGDOMAIN=US
I have also updated the Intel firmware in /lib/firmware using the latest downloaded from Intel.Code:~$ sudo iw wlp41s0 set freq 5220 80 5210 kernel reports: (extension) channel is disabled command failed: Invalid argument (-22)
Any thoughts or recommendations on where to go next would be appreciated.
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