Wi-Fi on Ubuntu 20.04 is very slow
11,046
I had similar behaviour on my Lenovo L13 Yoga. Same Network controller, same kernel.
$ lspci | grep Network
00:14.3 Network controller: Intel Corporation Wireless-AC 9462
$ uname -r
5.4.0-33-generic
I found a temporary fix: I downloaded the firmware directly from Intel: https://www.intel.de/content/www/de/de/support/articles/000005511/network-and-i-o/wireless-networking.html put it in /lib/firmware .
At each reboot I have to restart the wireless:
sudo modprobe -r iwlwifi
sudo modprobe iwlwifi
but after doing that wi-fi is working properly.
Author by
Galactus
Updated on September 18, 2022Comments
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Galactus over 1 year
I am using Ubuntu 20.04 dual boot with windows 10 on Dell Inspiron 13 7000 2-in-1 laptop.
Wi-Fi speeds in Ubuntu are very slow, whereas in Windows they are good. I checked the Wi-Fi signal. It is strong.
00:14.3 Network controller: Intel Corporation Wireless-AC 9462 Subsystem: Intel Corporation Wireless-AC 9462 Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+ Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 0 Interrupt: pin A routed to IRQ 16 Region 0: Memory at 602311c000 (64-bit, non-prefetchable) [size=16K] Capabilities: [c8] Power Management version 3 Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+) Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME- Capabilities: [d0] MSI: Enable- Count=1/1 Maskable- 64bit+ Address: 0000000000000000 Data: 0000 Capabilities: [40] Express (v2) Root Complex Integrated Endpoint, MSI 00 DevCap: MaxPayload 128 bytes, PhantFunc 0 ExtTag- RBE- FLReset+ DevCtl: CorrErr- NonFatalErr- FatalErr- UnsupReq- RlxdOrd+ ExtTag- PhantFunc- AuxPwr+ NoSnoop+ FLReset- MaxPayload 128 bytes, MaxReadReq 128 bytes DevSta: CorrErr- NonFatalErr- FatalErr- UnsupReq- AuxPwr+ TransPend- DevCap2: Completion Timeout: Range B, TimeoutDis+, NROPrPrP-, LTR+ 10BitTagComp-, 10BitTagReq-, OBFF Via WAKE#, ExtFmt-, EETLPPrefix- EmergencyPowerReduction Not Supported, EmergencyPowerReductionInit- FRS- AtomicOpsCap: 32bit- 64bit- 128bitCAS- DevCtl2: Completion Timeout: 16ms to 55ms, TimeoutDis-, LTR+, OBFF Disabled AtomicOpsCtl: ReqEn- Capabilities: [80] MSI-X: Enable+ Count=16 Masked- Vector table: BAR=0 offset=00002000 PBA: BAR=0 offset=00003000 Capabilities: [100 v1] Latency Tolerance Reporting Max snoop latency: 0ns Max no snoop latency: 0ns Capabilities: [164 v1] Vendor Specific Information: ID=0010 Rev=0 Len=014 <?> Kernel driver in use: iwlwifi Kernel modules: iwlwifi
Adding
dmesg
o/p:$sudo dmesg | grep -i iwl [sudo] password for ayalar: [ 2.414470] Loading modules backported from iwlwifi [ 2.414470] iwlwifi-stack-public:master:8324:9176b151 [ 2.474032] iwlwifi 0000:00:14.3: enabling device (0000 -> 0002) [ 2.479041] iwlwifi 0000:00:14.3: Direct firmware load for iwl-dbg-cfg.ini failed with error -2 [ 2.479328] iwlwifi 0000:00:14.3: Direct firmware load for iwlwifi-QuZ-a0-jf-b0-55.ucode failed with error -2 [ 2.479458] iwlwifi 0000:00:14.3: Direct firmware load for iwlwifi-QuZ-a0-jf-b0-54.ucode failed with error -2 [ 2.479476] iwlwifi 0000:00:14.3: Direct firmware load for iwlwifi-QuZ-a0-jf-b0-53.ucode failed with error -2 [ 2.479495] iwlwifi 0000:00:14.3: Direct firmware load for iwlwifi-QuZ-a0-jf-b0-52.ucode failed with error -2 [ 2.479510] iwlwifi 0000:00:14.3: Direct firmware load for iwlwifi-QuZ-a0-jf-b0-51.ucode failed with error -2 [ 2.479635] iwlwifi 0000:00:14.3: Direct firmware load for iwlwifi-QuZ-a0-jf-b0-50.ucode failed with error -2 [ 2.479650] iwlwifi 0000:00:14.3: Direct firmware load for iwlwifi-QuZ-a0-jf-b0-49.ucode failed with error -2 [ 2.481494] iwlwifi 0000:00:14.3: TLV_FW_FSEQ_VERSION: FSEQ Version: 43.2.23.17 [ 2.481695] iwlwifi 0000:00:14.3: loaded firmware version 48.4fa0041f.0 QuZ-a0-jf-b0-48.ucode op_mode iwlmvm [ 2.481716] iwlwifi 0000:00:14.3: Direct firmware load for iwl-debug-yoyo.bin failed with error -2 [ 2.551506] iwlwifi 0000:00:14.3: Detected Intel(R) Wireless-AC 9560, REV=0x354 [ 2.704999] iwlwifi 0000:00:14.3: base HW address: 5c:80:b6:a8:67:9a [ 2.937081] iwlwifi 0000:00:14.3 wlp0s20f3: renamed from wlan0
Kernel:
$ uname -r 5.4.0-33-generic
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Twilight almost 4 yearshave you checked if your using the open source WiFi driver? The closed source drivers are usually faster.
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chili555 almost 4 yearsPlease edit your question to show the result of the terminal command:
dmesg | grep iwl
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Galactus almost 4 years@chili555 i have added the dmesg o/p to the question. i remeber download propertiery blob when i was using 19.04 and then upgraded to 20.04. wifi speed was optimum on 19.04
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njoye almost 4 yearsDropping the unarchived folder into
/lib/firmware
did it for me - thanks! -
Sambhav Gore over 3 yearsthanks, this is the only solution that worked for me. @njoye is there no alternative to restart wireless after each reboot ?
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alfx over 3 yearsThis works and should be the accepted answer. However, in my case no wifi restart is needed.