我有一台戴尔 Vostro 5590 笔记本电脑，到目前为止，WiFi 工作正常。突然，Ubuntu 找不到任何 WiFi 适配器。我对 Linux 还很陌生，所以我不知道该怎么办。我发现这是一个固件问题，所以我尝试使用 synoptic 降级，但没有成功，因此我再次升级。
以下是一些终端输出：
(base) sarah@sarah-Vostro-5590:~$ lshw -C network
WARNING: you should run this program as super-user.
*-network
description: Network controller
product: Intel Corporation
vendor: Intel Corporation
physical id: 14.3
bus info: pci@0000:00:14.3
version: 00
width: 64 bits
clock: 33MHz
capabilities: bus_master cap_list
configuration: driver=iwlwifi latency=0
resources: irq:16 memory:c2318000-c231bfff
*-network
description: Ethernet interface
product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:02:00.0
logical name: enp2s0
version: 15
serial: f0:d4:e2:f1:80:0d
size: 1Gbit/s
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8169 duplex=full firmware=rtl8168h-2_0.0.2 02/26/15 ip=192.168.1.27 latency=0 link=yes multicast=yes port=MII speed=1Gbit/s
resources: irq:16 ioport:3000(size=256) memory:c2204000-c2204fff memory:c2200000-c2203fff
(base) sarah@sarah-Vostro-5590:~$ dmesg | grep -i firm
[ 0.183598] ACPI: [Firmware Bug]: BIOS _OSI(Linux) query ignored
[ 1.926505] Bluetooth: hci0: Minimum firmware build 1 week 10 2014
[ 1.939148] iwlwifi 0000:00:14.3: loaded firmware version 48.13675109.0 op_mode iwlmvm
[ 1.940042] Bluetooth: hci0: Found device firmware: intel/ibt-19-0-0.sfi
[ 2.083344] iwlwifi 0000:00:14.3: Allocated 0x00400000 bytes for firmware monitor.
[ 2.187648] [drm] Finished loading DMC firmware i915/kbl_dmc_ver1_04.bin (v1.4)
[ 2.320323] [Firmware Bug]: ACPI(PXSX) defines _DOD but not _DOS
[ 3.114868] iwlwifi 0000:00:14.3: Loaded firmware version: 48.13675109.0
[ 3.115062] iwlwifi 0000:00:14.3: Firmware not running - cannot dump error
[ 3.527261] Bluetooth: hci0: Waiting for firmware download to complete
[ 3.527451] Bluetooth: hci0: Firmware loaded in 1564676 usecs
我使用的是以下内核 5.3.0-40-generic。正如我所说，我有点菜鸟。我本来想尝试取出电池，但我需要拧开整个底部，所以如果有人有更复杂的解决方案，我会很高兴听到！