我的无线适配器过了一会儿就失去连接，只有重新启动才能解决问题。
$ uname -a
Linux surveillance1 5.0.0-25-generic #26~18.04.1-Ubuntu SMP Thu Aug 1 13:51:34 UTC 2019 i686 i686 i686 GNU/Linux here
$ ip a
3: wls3: <BROADCAST,MULTICAST> mtu 1500 qdisc mq state DOWN group default qlen 1000
link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
$ ifconfig -a
wls3: flags=4098<BROADCAST,MULTICAST> mtu 1500
ether 00:00:00:00:00:00 txqueuelen 1000 (Ethernet)
RX packets 523328 bytes 697266856 (697.2 MB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 257229 bytes 27152661 (27.1 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
$ lshw
*-pci:1
Beschreibung: PCI bridge
Produkt: NM10/ICH7 Family PCI Express Port 2
Hersteller: Intel Corporation
Physische ID: 1c.1
Bus-Informationen: pci@0000:00:1c.1
Version: 02
Breite: 32 bits
Takt: 33MHz
Fähigkeiten: pci normal_decode bus_master cap_list
Konfiguration: driver=pcieport
Ressourcen: irq:25 ioport:3000(Größe=8192) memory:ec000000-edffffff ioport:e4000000(Größe=1048576)
*-network DEAKTIVIERT
Beschreibung: Kabellose Verbindung
Produkt: PRO/Wireless 3945ABG [Golan] Network Connection
Hersteller: Intel Corporation
Physische ID: 0
Bus-Informationen: pci@0000:03:00.0
Logischer Name: wls3
Version: 02
Seriennummer: 00:00:00:00:00:00
Breite: 32 bits
Takt: 33MHz
Fähigkeiten: bus_master cap_list ethernet physical wireless
Konfiguration: broadcast=yes driver=iwl3945 driverversion=5.0.0-25-generic firmware=15.32.2.9 latency=0 link=no multicast=yes wireless=IEEE 802.11
Ressourcen: irq:31 memory:edf00000-edf00fff
我尝试
$ sudo ifup wlan0
error: cannot find interfaces: wlan0
$sudo ifup wls3
error: cannot find interfaces: wls3
dmesg（部分）
$ dmesg
[20803.015155] wls3: Failed check-sdata-in-driver check, flags: 0x4
[20803.015206] WARNING: CPU: 1 PID: 15470 at /build/linux-hwe-DU_X3C/linux-hwe-5.0.0/net/mac80211/driver-ops.h:19 drv_conf_tx+0x160/0x1b0 [mac80211]
[20803.015207] Modules linked in: btrfs zstd_compress xor raid6_pq ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c cpuid hid_generic usbhid hid pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) binfmt_misc arc4 snd_hda_codec_analog snd_hda_codec_generic coretemp snd_hda_intel iwl3945 snd_hda_codec kvm iwlegacy snd_hda_core irqbypass thinkpad_acpi pcmcia snd_hwdep input_leds nvram mac80211 snd_pcm serio_raw ledtrig_audio yenta_socket snd_seq_midi lpc_ich pcmcia_rsrc snd_seq_midi_event pcmcia_core snd_rawmidi snd_seq snd_seq_device snd_timer cfg80211 snd soundcore mac_hid sch_fq_codel parport_pc ppdev lp parport ip_tables x_tables autofs4 crypto_simd cryptd aes_i586 algif_skcipher af_alg dm_crypt i915 i2c_algo_bit drm_kms_helper syscopyarea psmouse firewire_ohci ahci sysfillrect libahci firewire_core pata_acpi sysimgblt fb_sys_fops sdhci_pci e1000e cqhci crc_itu_t sdhci drm video
[20803.015250] CPU: 1 PID: 15470 Comm: kworker/1:0 Tainted: G W OE 5.0.0-25-generic #26~18.04.1-Ubuntu
[20803.015251] Hardware name: LENOVO 17045UG/17045UG, BIOS 7BETC7WW (2.08 ) 03/07/2007
[20803.015284] Workqueue: events_freezable ieee80211_restart_work [mac80211]
[20803.015318] EIP: drv_conf_tx+0x160/0x1b0 [mac80211]
[20803.015320] Code: 8d 65 f4 89 f8 5b 5e 5f 5d c3 8b 55 ec 8b 8a ec 02 00 00 81 c2 fc 02 00 00 50 85 c9 0f 45 d1 52 68 74 6d 97 f8 e8 00 f0 77 d3 <0f> 0b 83 c4 0c 8d 65 f4 bf fb ff ff ff 89 f8 5b 5e 5f 5d c3 8d 74
[20803.015322] EAX: 00000035 EBX: f2c41982 ECX: f75e8680 EDX: 00000007
[20803.015324] ESI: f2c41580 EDI: 00000003 EBP: df34dbac ESP: df34db8c
[20803.015326] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 EFLAGS: 00010296
[20803.015328] CR0: 80050033 CR2: 0061fb60 CR3: 31cf0000 CR4: 000006f0
答案1
假设您已应用所有当前的 Ubuntu 软件更新，您可以尝试更新 BIOS。它可能会（也可能不会）解决您当前的问题。
注意：请先备份您的重要文件！
您的 BIOS 版本是 7BETC7WW (V2.08) 03/07/2007。
当前版本似乎是 2011 年 2 月 13 日 29CN38WW (V2.15)。
注意：请使用您的型号在联想网站上验证此 BIOS 信息
去https://support.lenovo.com/us/en/downloads/ds008568下载新版本。其中还提供了安装说明。