Using this guide
https://www.dell.com/support/article/ng/en/ngdhs1/sln306440/killer-n1535
-wireless-firmware-manual-update-guide-for-ubuntu-systems?lang=en and
upgrading to latest firmware for Dell XPS 15 on Ubuntu 17.10 for the
following below solved my wifi frequent connection drop while
NetworkManager was still showing the Wifi was connected.
uname -r
4.13.0-16-lowlatency
dpkg -l linux-firmware | grep ii
ii linux-firmware 1.169 all Firmware for Linux kernel drivers
lspci -vvv
02:00.0 Network controller: Qualcomm Atheros QCA6174 802.11ac Wireless Network
Adapter (rev 32)
Subsystem: Bigfoot Networks, Inc. QCA6174 802.11ac Wireless Network
Adapter
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B- DisINTx+
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort-
<MAbort- >SERR- <PERR- INTx-
Latency: 0
Interrupt: pin A routed to IRQ 140
Region 0: Memory at ed200000 (64-bit, non-prefetchable) [size=2M]
Capabilities: <access denied>
Kernel driver in use: ath10k_pci
Kernel modules: ath10k_pci
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https://bugs.launchpad.net/bugs/1670041
Title:
Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
1535)
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions
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