I am dual-booting 16.04 with Windows 10 on an Acer Aspire E15 E5-575G-76YK. The Wi-Fi worked fine (but on the slow side) after installation, but more recently it will lose the internet connection despite still being connected to the network. It started happening once every hour or two, but now it can hardly keep the internet connection for a couple minutes before it drops. The only way to regain internet access is to restart network-manager several times, and then it only lasts for minute or two before cutting out again.
The output of
lspci -nnk | grep -iA2 net; dmesg | grep ath10k is:
03:00.0 Network controller : Qualcomm Atheros Device [168c:0042] (rev 31) Subsystem: Lite-On Communications Inc Device [11ad:08a6] Kernel driver in use: ath10k_pci -- 04:00.1 Ethernet controller : Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 12) Subsystem: Acer Incorporated [ALI] RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [1025:1094] Kernel driver in use: r8169 Kernel modules: r8169 [ 2.191992] ath10k_pci 0000:03:00.0: pci irq msi-x interrupts 8 irq_mode 0 reset_mode 0 [ 2.448292] ath10k_pci 0000:03:00.0: Direct firmware load for ath10k/cal-pci-0000:03:00.0.bin failed with error -2 [ 4.321196] ath10k_pci 0000:03:00.0: qca9377 hw1.1 (0x05020001, 0x003821ff sub 11ad:08a6) fw WLAN.TF.1.0-00267-1 fwapi 5 bdapi 2 htt-ver 3.1 wmi-op 4 htt-op 3 cal otp max-sta 32 raw 0 hwcrypto 1 features ignore-otp [ 4.321199] ath10k_pci 0000:03:00.0: debug 0 debugfs 1 tracing 1 dfs 0 testmode 0 [ 4.327183] ath10k_pci 0000:03:00.0 wlp3s0: renamed from wlan0 [ 6.626532] ath10k_pci 0000:03:00.0: no channel configured; ignoring frame(s)! [ 10.368161] ath10k_pci 0000:03:00.0: no channel configured; ignoring frame(s)! [ 93.957264] ath10k_pci 0000:03:00.0: no channel configured; ignoring frame(s)! [ 94.009502] ath10k_pci 0000:03:00.0: no channel configured; ignoring frame(s)! [ 132.841153] ath10k_pci 0000:03:00.0: no channel configured; ignoring frame(s)!
There have been similar questions such as  and  below but they haven't been answered. And this isn't a duplicate question of  - I have the ath10k drivers installed. Plus, the wireless did work somewhat well at some point, and has degraded over the past week to where it is now.
For what it's worth, the wireless on this computer has never gotten faster than 5 Mb/s in either Windows or Ubuntu.
If it's helpful, output of
wlp3s0 IEEE 802.11abgn ESSID:"*********" Mode:Managed Frequency:2.462 GHz Access Point: 00:1A:1E:8A:F6:21 Bit Rate=1 Mb/s Tx-Power=20 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. enp4s0f1 no wireless extensions.