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Works:
Wifi worked for about 10 sec. after doing:
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service network-manager restart
Things I've tried:
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sudo apt-get install --reinstall linux-firmware
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$ sudo lshw -C network
*-network
description: Ethernet interface
product: RTL8101/2/6E PCI Express Fast/Gigabit Ethernet controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:02:00.0
logical name: enp2s0
version: 07
serial: 8c:ec:4b:03:a1:df
size: 100Mbit/s
capacity: 100Mbit/s
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=full firmware=rtl8106e-1_0.0.1 06/29/12 ip=192.168.239.54 latency=0 link=yes multicast=yes port=MII speed=100Mbit/s
resources: irq:279 ioport:d000(size=256) memory:d2204000-d2204fff memory:d2200000-d2203fff
*-network
description: Wireless interface
product: Qualcomm Atheros
vendor: Qualcomm Atheros
physical id: 0
bus info: pci@0000:03:00.0
logical name: wlp3s0
version: 31
serial: d4:6a:6a:d9:cd:29
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=ath10k_pci driverversion=4.10.0-38-generic firmware=WLAN.TF.1.0-00267-1 ip=192.168.239.53 latency=0 link=yes multicast=yes wireless=IEEE 802.11
resources: irq:283 memory:d2000000-d21fffff
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$ lspci -knn | grep Net -A2
03:00.0 Network controller [0280]: Qualcomm Atheros Device [168c:0042] (rev 31)
Subsystem: Dell Device [1028:1810]
Kernel driver in use: ath10k_pci
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$ uname -r
4.10.0-38-generic
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$ lspci -nnk | grep -iA2 net; dmesg | grep ath10k
02:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8101/2/6E PCI Express Fast/Gigabit Ethernet controller [10ec:8136] (rev 07)
Subsystem: Dell RTL8101/2/6E PCI Express Fast/Gigabit Ethernet controller [1028:0810]
Kernel driver in use: r8169
Kernel modules: r8169, r8101
03:00.0 Network controller [0280]: Qualcomm Atheros Device [168c:0042] (rev 31)
Subsystem: Dell Device [1028:1810]
Kernel driver in use: ath10k_pci
[ 4.902192] ath10k_pci 0000:03:00.0: enabling device (0000 -> 0002)
[ 4.903076] ath10k_pci 0000:03:00.0: pci irq msi oper_irq_mode 2 irq_mode 0 reset_mode 0
[ 5.194438] ath10k_pci 0000:03:00.0: Direct firmware load for ath10k/pre-cal-pci-0000:03:00.0.bin failed with error -2
[ 5.194447] ath10k_pci 0000:03:00.0: Direct firmware load for ath10k/cal-pci-0000:03:00.0.bin failed with error -2
[ 5.198516] ath10k_pci 0000:03:00.0: qca9377 hw1.1 target 0x05020001 chip_id 0x003821ff sub 1028:1810
[ 5.198517] ath10k_pci 0000:03:00.0: kconfig debug 0 debugfs 1 tracing 1 dfs 0 testmode 0
[ 5.198815] ath10k_pci 0000:03:00.0: firmware ver WLAN.TF.1.0-00267-1 api 5 features ignore-otp crc32 79cea2c7
[ 5.264367] ath10k_pci 0000:03:00.0: failed to fetch board data for bus=pci,vendor=168c,device=0042,subsystem-vendor=1028,subsystem-device=1810 from ath10k/QCA9377/hw1.0/board-2.bin
[ 5.265274] ath10k_pci 0000:03:00.0: board_file api 1 bmi_id N/A crc32 544289f7
[ 7.074424] ath10k_pci 0000:03:00.0: htt-ver 3.1 wmi-op 4 htt-op 3 cal otp max-sta 32 raw 0 hwcrypto 1
[ 7.087956] ath10k_pci 0000:03:00.0 wlp3s0: renamed from wlan0
[ 9.346763] ath10k_pci 0000:03:00.0: no channel configured; ignoring frame(s)!
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$ lsmod | grep ath
ath10k_pci 45056 0
ath10k_core 344064 1 ath10k_pci
ath 28672 1 ath10k_core
mac80211 782336 1 ath10k_core
cfg80211 602112 3 mac80211,ath,ath10k_core
jarno@jarno-Inspiron-5570 ~ $ dmesg | grep 02:00
[ 0.231768] pci 0000:02:00.0: [10ec:8136] type 00 class 0x020000
[ 0.231802] pci 0000:02:00.0: reg 0x10: [io 0xd000-0xd0ff]
[ 0.231837] pci 0000:02:00.0: reg 0x18: [mem 0xd2204000-0xd2204fff 64bit]
[ 0.231860] pci 0000:02:00.0: reg 0x20: [mem 0xd2200000-0xd2203fff 64bit pref]
[ 0.231983] pci 0000:02:00.0: supports D1 D2
[ 0.231984] pci 0000:02:00.0: PME# supported from D0 D1 D2 D3hot D3cold
[ 0.232054] pci 0000:02:00.0: System wakeup disabled by ACPI
[ 0.906580] r8169 0000:02:00.0 eth0: RTL8106e at 0xffff9d4f40cb1000, 8c:ec:4b:03:a1:df, XID 04900000 IRQ 279
[ 0.926155] r8169 0000:02:00.0 enp2s0: renamed from eth0
[ 5.568215] r8169 0000:02:00.0 enp2s0: link down
[ 5.568219] r8169 0000:02:00.0 enp2s0: link down
[ 7.158853] r8169 0000:02:00.0 enp2s0: link up
[ 10.628873] r8169 0000:02:00.0 enp2s0: link down
[ 44.920483] r8169 0000:02:00.0 enp2s0: link up
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$ rfkill list all
0: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
1: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no