在上次更新 linux-header 后，我发现我的 Dell XPS 13 9360 DE 上的 wifi 连接有一些“改进”。
操作系统：Ubuntu 16.04 LTS
uname-a
Linux debby 4.4.0-53-generic #74-Ubuntu SMP Fri Dec 2 15:59:10 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
消息
[ 190.122986] cfg80211: World regulatory domain updated:
[ 190.123001] cfg80211: DFS Master region: unset
[ 190.123008] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
[ 190.123022] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
[ 190.123033] cfg80211: (2457000 KHz - 2482000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
[ 190.123042] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (N/A, 2000 mBm), (N/A)
[ 190.123053] cfg80211: (5170000 KHz - 5250000 KHz @ 80000 KHz, 160000 KHz AUTO), (N/A, 2000 mBm), (N/A)
[ 190.123066] cfg80211: (5250000 KHz - 5330000 KHz @ 80000 KHz, 160000 KHz AUTO), (N/A, 2000 mBm), (0 s)
[ 190.123076] cfg80211: (5490000 KHz - 5730000 KHz @ 160000 KHz), (N/A, 2000 mBm), (0 s)
[ 190.123086] cfg80211: (5735000 KHz - 5835000 KHz @ 80000 KHz), (N/A, 2000 mBm), (N/A)
[ 190.123096] cfg80211: (57240000 KHz - 63720000 KHz @ 2160000 KHz), (N/A, 0 mBm), (N/A)
[ 193.929587] wlp58s0: authenticate with 5c:49:xx:xx:xx:xx
[ 193.962989] wlp58s0: send auth to 5c:49:xx:xx:xx:xx (try 1/3)
[ 193.964196] wlp58s0: authenticated
[ 193.967818] wlp58s0: associate with 5c:49:xx:xx:xx:xx (try 1/3)
[ 193.975898] wlp58s0: RX AssocResp from 5c:49:xx:xx:xx:xx (capab=0x411 status=0 aid=2)
[ 193.979704] wlp58s0: associated
[ 193.993046] ath: EEPROM regdomain: 0x8114
[ 193.993059] ath: EEPROM indicates we should expect a country code
[ 193.993065] ath: doing EEPROM country->regdmn map search
[ 193.993071] ath: country maps to regdmn code: 0x37
[ 193.993077] ath: Country alpha2 being used: DE
[ 193.993082] ath: Regpair used: 0x37
[ 193.993090] ath: regdomain 0x8114 dynamically updated by country IE
[ 193.993125] cfg80211: Regulatory domain changed to country: DE
[ 193.993132] cfg80211: DFS Master region: ETSI
[ 193.993139] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
[ 193.993151] cfg80211: (2400000 KHz - 2483500 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
[ 193.993163] cfg80211: (5150000 KHz - 5250000 KHz @ 80000 KHz, 200000 KHz AUTO), (N/A, 2000 mBm), (N/A)
[ 193.993194] cfg80211: (5250000 KHz - 5350000 KHz @ 80000 KHz, 200000 KHz AUTO), (N/A, 2000 mBm), (0 s)
[ 193.993203] cfg80211: (5470000 KHz - 5725000 KHz @ 160000 KHz), (N/A, 2698 mBm), (0 s)
[ 193.993210] cfg80211: (57000000 KHz - 66000000 KHz @ 2160000 KHz), (N/A, 4000 mBm), (N/A)
[ 194.025239] wlp58s0: Limiting TX power to 20 (23 - 3) dBm as advertised by 5c:49:xx:xx:xx:xx
启动后我需要 3 分钟才能连接到 wifi，并且从睡眠/挂起状态唤醒后无法重新连接到 wifi。
在我更新 linux-kernel-headers 之前一切正常。
我在 dmesg 中收到此错误：
14.636058] ath10k_pci 0000:3a:00.0: Direct firmware load for ath10k/cal-pci-0000:3a:00.0.bin failed with error -2
[ 14.636320] ath10k_pci 0000:3a:00.0: Direct firmware load for ath10k/QCA6174/hw3.0/firmware-5.bin failed with error -2
[ 14.636327] ath10k_pci 0000:3a:00.0: could not fetch firmware file 'ath10k/QCA6174/hw3.0/firmware-5.bin': -2
[ 16.832396] ath10k_pci 0000:3a:00.0: qca6174 hw3.2 (0x05030000, 0x00340aff sub 1a56:1535) fw WLAN.RM.2.0-00180-QCARMSWPZ-1 fwapi 4 bdapi 2 htt-ver 3.26 wmi-op 4 htt-op 3 cal otp max-sta 32 raw 0 hwcrypto 1 features wowlan,ignore-otp,no-4addr-pad
[ 16.832408] ath10k_pci 0000:3a:00.0: debug 0 debugfs 1 tracing 1 dfs 0 testmode 0
firmware-5.bin 问题无关紧要，但我以前没有遇到过其他错误。有人遇到过同样的问题或有解决方案吗？
谢谢
答案1
好的，我想我可以让我的 WiFi 工作得更好：
1.) 我查看了文件夹中的文件/lib/firmware/ath10k/QCA6174/hw3.0，发现有两个文件我以前从未见过。我多次查看了这个文件夹以解决我的 BT 问题。
2.) 这些文件/lib/firmware/ath10k/QCA6174/hw3.0/board-2.bin.wifi-qca6174和/lib/firmware/ath10k/QCA6174/hw3.0/board.bin.wifi-qca6174是新的，我已将其添加.old到它们的文件名中。
3.) 现在这些连接问题似乎少了很多。有时我得等几秒钟，但不用等 3 分钟。