我的无线网卡一直有问题。这是我从 dmesg 得到的信息：
A@B:~$ dmesg | grep iwlwifi
[ 4.410812] iwlwifi 0000:06:00.0: loaded firmware version 17.948900127.0 op_mode iwlmvm
[ 4.461558] iwlwifi 0000:06:00.0: Detected Intel(R) Dual Band Wireless AC 7260, REV=0x144
[ 4.479921] iwlwifi 0000:06:00.0: base HW address: 90:2e:1c:4a:98:2c
[ 4.695410] iwlwifi 0000:06:00.0 wlp6s0: renamed from wlan0
[ 109.553413] iwlwifi 0000:06:00.0: iwlwifi transaction failed, dumping registers
[ 109.553421] iwlwifi 0000:06:00.0: iwlwifi device config registers:
[ 109.553482] iwlwifi 0000:06:00.0: 00000000: 08b18086 00100000 028000c3 00000000 00000004 00000000 00000000 00000000
[ 109.553487] iwlwifi 0000:06:00.0: 00000020: 00000000 00000000 00000000 c0708086 00000000 000000c8 00000000 00000100
[ 109.553491] iwlwifi 0000:06:00.0: iwlwifi device memory mapped registers:
[ 109.553530] iwlwifi 0000:06:00.0: 00000000: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff
[ 109.553534] iwlwifi 0000:06:00.0: 00000020: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff
[ 109.553541] iwlwifi 0000:06:00.0: iwlwifi device AER capability structure:
[ 109.553574] iwlwifi 0000:06:00.0: 00000000: 14010001 00100000 00000000 00462031 00002000 00002000 00000014 40000001
[ 109.553577] iwlwifi 0000:06:00.0: 00000020: 0000000f f7900460 00000000
[ 109.553581] iwlwifi 0000:06:00.0: iwlwifi parent port (0000:00:1c.2) config registers:
[ 109.553614] iwlwifi 0000:00:1c.2: 00000000: 8c148086 00100407 060400d5 00810010 00000000 00000000 00060600 200000f0
[ 109.553618] iwlwifi 0000:00:1c.2: 00000020: f790f790 0001fff1 00000000 00000000 00000000 00000040 00000000 00100303
[ 109.553678] WARNING: CPU: 7 PID: 0 at /build/linux-60XibS/linux-4.15.0/drivers/net/wireless/intel/iwlwifi/pcie/trans.c:1973 iwl_trans_pcie_grab_nic_access+0xea/0xf0 [iwlwifi]
[ 109.553679] Modules linked in: rfcomm ccm bnep arc4 pn544_mei mei_phy pn544 hci nfc joydev intel_rapl x86_pkg_temp_thermal iwlmvm intel_powerclamp coretemp dell_laptop kvm_intel dell_smbios_smm dcdbas mac80211 kvm irqbypass crct10dif_pclmul dell_wmi sparse_keymap crc32_pclmul ghash_clmulni_intel pcbc aesni_intel aes_x86_64 crypto_simd glue_helper cryptd intel_cstate dell_smbios_wmi intel_rapl_perf dell_smbios input_leds wmi_bmof dell_wmi_descriptor uvcvideo serio_raw videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 rtsx_pci_ms videobuf2_core videodev iwlwifi memstick hid_multitouch btusb media btrtl btbcm btintel snd_hda_codec_hdmi bluetooth cfg80211 snd_hda_codec_realtek ecdh_generic snd_hda_codec_generic snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_pcm acpi_als kfifo_buf industrialio
[ 109.553793] RIP: 0010:iwl_trans_pcie_grab_nic_access+0xea/0xf0 [iwlwifi]
[ 109.553823] iwl_read_prph+0x38/0x90 [iwlwifi]
[ 109.553834] iwl_trans_pcie_log_scd_error+0x125/0x1f0 [iwlwifi]
[ 109.553848] ? iwl_pcie_txq_build_tfd+0xe0/0xe0 [iwlwifi]
[ 109.553856] iwl_pcie_txq_stuck_timer+0x46/0x70 [iwlwifi]
[ 109.608796] iwlwifi 0000:06:00.0: Queue 10 is active on fifo 2 and stuck for 10000 ms. SW [56, 65] HW [90, 90] FH TRB=0x05a5a5a5a
当我 grep lsmod 时，我得到了以下结果，
A@B:~$ lsmod | grep iwl
iwlmvm 364544 0
mac80211 778240 1 iwlmvm
iwlwifi 282624 1 iwlmvm
cfg80211 622592 3 iwlmvm,iwlwifi,mac80211
这是我运行 iwconfig 时得到的结果，
A@B:~$ iwconfig
enxd8eb97b0f784 no wireless extensions.
wlp6s0 IEEE 802.11 ESSID:"my_internet"
Mode:Managed Frequency:5.745 GHz Access Point: 3C:1E:04:DC:AA:9D
Bit Rate=650 Mb/s Tx-Power=22 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:off
Link Quality=59/70 Signal level=-51 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:44 Missed beacon:0
lo no wireless extensions.
当我查看网络管理器状态时，我得到的结果如下，
A@B:~$ cat /var/lib/NetworkManager/NetworkManager.state
[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true
最后，这是我查找以下内容时得到的结果，
A@B:~$ lspci | grep Network && uname -a
06:00.0 Network controller: Intel Corporation Wireless 7260 (rev c3)
Linux B 4.15.0-29-generic #31-Ubuntu SMP Tue Jul 17 15:39:52 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
有关我的计算机的一些信息：我运行的是戴尔 XPS 15 9530，配备英特尔 i7 CPU，我猜还有英特尔无线 7260 卡。
我认为这里有一些重要的事情需要注意。通常当我的电脑与无线网卡断开连接时（至少我认为是这样），然后当我运行
dmesg | grep iwl、lsmod | grep iwl 和 iwconfig，我分别得到任何内容、任何内容和“lo no wireless extensionion”。
我尝试通过 modprobe 命令卸载并重新加载 iwlconfig，但没有帮助。此外，我尝试使用 linux 内核 4.15.24 来查看是否是当前内核的问题。这也没有帮助。
在类似这样的论坛上搜索让我尝试了所有这些不同的方法。但到目前为止我还没有成功。所以这是直接的求助。因为我依靠互联网来完成我的工作，所以无法工作真是令人沮丧。我可以得到一些帮助吗？是否需要更多信息来解决这个问题？
非常感谢！
更新（2018 年 8 月 8 日）
我的电脑遇到了一个全新的问题。这是我从 dmesg 得到的信息：
A@B:~$ dmesg --level=err
[ 28.545162] iwlwifi 0000:06:00.0: Hardware error detected. Restarting.
[ 28.545249] iwlwifi 0000:06:00.0: HW error, resetting before reading
[ 28.604079] iwlwifi 0000:06:00.0: iwlwifi transaction failed, dumping registers
[ 28.604082] iwlwifi 0000:06:00.0: iwlwifi device config registers:
[ 28.604137] iwlwifi 0000:06:00.0: 00000000: 08b18086 00100406 028000c3 00000000 f7900004 00000000 00000000 00000000
[ 28.604140] iwlwifi 0000:06:00.0: 00000020: 00000000 00000000 00000000 c0708086 00000000 000000c8 00000000 00000100
[ 28.604141] iwlwifi 0000:06:00.0: iwlwifi device memory mapped registers:
[ 28.604187] iwlwifi 0000:06:00.0: 00000000: 40800000 80000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 28.604189] iwlwifi 0000:06:00.0: 00000020: 00000001 080003dc 00000144 00000000 80000000 803a0000 80008040 00080046
[ 28.604194] iwlwifi 0000:06:00.0: iwlwifi device AER capability structure:
[ 28.604222] iwlwifi 0000:06:00.0: 00000000: 14010001 00000000 00000000 00462031 00000000 00002000 00000000 00000000
[ 28.604224] iwlwifi 0000:06:00.0: 00000020: 00000000 00000000 00000000
[ 28.604226] iwlwifi 0000:06:00.0: iwlwifi parent port (0000:00:1c.2) config registers:
[ 28.604240] iwlwifi 0000:00:1c.2: 00000000: 8c148086 00100407 060400d5 00810010 00000000 00000000 00060600 200000f0
[ 28.604242] iwlwifi 0000:00:1c.2: 00000020: f790f790 0001fff1 00000000 00000000 00000000 00000040 00000000 00100303
[ 30.796567] iwlwifi 0000:06:00.0: Access time out - failed to enable LP XTAL
[ 30.841730] iwlwifi 0000:06:00.0: Failed to init the card
[ 30.843234] wlp6s0: failed to remove key (0, 3c:1e:04:dc:aa:9d) from hardware (-5)
[ 30.847718] iwlwifi 0000:06:00.0: iwl_trans_wait_tx_queues_empty bad state = 0
[ 30.848028] wlp6s0: failed to remove key (2, ff:ff:ff:ff:ff:ff) from hardware (-5)