我在戴尔 Inspiron 13 7000 二合一笔记本电脑上使用 Ubuntu 20.04 与 Windows 10 双启动。
Ubuntu 的 Wi-Fi 速度非常慢,而 Windows 的速度却很快。我检查了 Wi-Fi 信号。信号很强。
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
添加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
核心:
$ uname -r
5.4.0-33-generic
答案1
我的联想 L13 Yoga 也出现了类似的情况。相同的网络控制器,相同的内核。
$ lspci | grep Network
00:14.3 Network controller: Intel Corporation Wireless-AC 9462
$ uname -r
5.4.0-33-generic
我找到了一个临时的解决方法:我直接从英特尔下载了固件:https://www.intel.de/content/www/de/de/support/articles/000005511/network-and-io/wireless-networking.html将其放在 /lib/firmware 中。
每次重启时我都必须重新启动无线:
sudo modprobe -r iwlwifi
sudo modprobe iwlwifi
但这样做之后,Wi-Fi 就可以正常工作了。
答案2
尝试通过设置11n_disable=1
或禁用 11n 功能11n_disable=8
sudo modprobe -r iwlwifi
sudo modprobe iwlwifi 11n_disable=8
8 对我有用。要使其永久生效,请在 conf 文件末尾添加此行/etc/modprobe.d/iwlwifi.conf
::
options iwlwifi 11n_disable=8
答案3
请尝试:
sudo apt purge backport-iwlwifi-dkms
重启后我们再看看新的:
dmesg | grep iwl
答案4
请尝试使用内核版本启动:
5.4.0-31-generic
我在这里遇到了同样的问题,并且它为我解决了。