XPS 13 9360 overheats when WiFi is on

Hey guys,

I've been using XPS 13 for ~3 months and noticed it's constantly running fan on full power which is really noisy and still gets really really hot. It also affect performance because apparently it scales down CPU frequency.

I thought I have dust in my fan so I opened it up, cleaned it but there were not much.

I'm on Linux Mint 18, kernel 4.8, latest BIOS (as of today).

Here is my sensors output

coretemp-isa-0000

Adapter: ISA adapter
Physical id 0: +86.0°C (high = +100.0°C, crit = +100.0°C)
Core 0: +82.0°C (high = +100.0°C, crit = +100.0°C)
Core 1: +81.0°C (high = +100.0°C, crit = +100.0°C)

acpitz-virtual-0
Adapter: Virtual device
temp1: +25.0°C (crit = +107.0°C)

iwlwifi-virtual-0
Adapter: Virtual device
temp1: +64.0°C

pch_skylake-virtual-0
Adapter: Virtual device
temp1: +74.5°C

when I switch on laptop temp is pretty much the same to what you see here. It grows only for iwlwifi-virtual-0. It starts at 25C and then stays at ~62-65C.

Here is my cpufreq-info output

cpufrequtils 008: cpufreq-info (C) Dominik Brodowski 2004-2009
Report errors and bugs to cpufreq@vger.kernel.org, please.
analyzing CPU 0:
driver: intel_pstate
CPUs which run at the same hardware frequency: 0
CPUs which need to have their frequency coordinated by software: 0
maximum transition latency: 0.97 ms.
hardware limits: 400 MHz - 3.50 GHz
available cpufreq governors: performance, powersave
current policy: frequency should be within 400 MHz and 3.50 GHz.
The governor "performance" may decide which speed to use
within this range.
current CPU frequency is 1.90 GHz.
analyzing CPU 1:
driver: intel_pstate
CPUs which run at the same hardware frequency: 1
CPUs which need to have their frequency coordinated by software: 1
maximum transition latency: 0.97 ms.
hardware limits: 400 MHz - 3.50 GHz
available cpufreq governors: performance, powersave
current policy: frequency should be within 400 MHz and 3.50 GHz.
The governor "performance" may decide which speed to use
within this range.
current CPU frequency is 1.90 GHz.
analyzing CPU 2:
driver: intel_pstate
CPUs which run at the same hardware frequency: 2
CPUs which need to have their frequency coordinated by software: 2
maximum transition latency: 0.97 ms.
hardware limits: 400 MHz - 3.50 GHz
available cpufreq governors: performance, powersave
current policy: frequency should be within 400 MHz and 3.50 GHz.
The governor "performance" may decide which speed to use
within this range.
current CPU frequency is 1.90 GHz.
analyzing CPU 3:
driver: intel_pstate
CPUs which run at the same hardware frequency: 3
CPUs which need to have their frequency coordinated by software: 3
maximum transition latency: 0.97 ms.
hardware limits: 400 MHz - 3.50 GHz
available cpufreq governors: performance, powersave
current policy: frequency should be within 400 MHz and 3.50 GHz.
The governor "performance" may decide which speed to use
within this range.
current CPU frequency is 1.90 GHz.

So even though I switched governor to performance it throttles my CPU.

Here is output of sudo lshw -C network

description: Wireless interface
product: Wireless 8260
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:3a:00.0
logical name: wlp58s0
version: 3a
serial: e4:b3:18:bc:bd:2b
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlwifi driverversion=4.8.0-45-generic firmware=22.391740.0 ip=192.168.1.3 latency=0 link=yes multicast=yes wireless=IEEE 802.11
resources: irq:286 memory:dc200000-dc201fff
*-network:0
description: Ethernet interface
physical id: 2
logical name: veth94010cb
serial: 4e:78:15:56:66:62
size: 10Gbit/s
capabilities: ethernet physical
configuration: autonegotiation=off broadcast=yes driver=veth driverversion=1.0 duplex=full link=yes multicast=yes port=twisted pair speed=10Gbit/s
*-network:1
description: Ethernet interface
physical id: 3
logical name: veth3a92142
serial: 5a:16:c0:23:b4:54
size: 10Gbit/s
capabilities: ethernet physical
configuration: autonegotiation=off broadcast=yes driver=veth driverversion=1.0 duplex=full link=yes multicast=yes port=twisted pair speed=10Gbit/s
*-network:2
description: Ethernet interface
physical id: 4
logical name: veth52ba1dd
serial: a2:a1:b9:ed:01:d4
size: 10Gbit/s
capabilities: ethernet physical
configuration: autonegotiation=off broadcast=yes driver=veth driverversion=1.0 duplex=full link=yes multicast=yes port=twisted pair speed=10Gbit/s
*-network:3
description: Ethernet interface
physical id: 5
logical name: vethb0dac4b
serial: 06:df:05:ae:32:38
size: 10Gbit/s
capabilities: ethernet physical
configuration: autonegotiation=off broadcast=yes driver=veth driverversion=1.0 duplex=full link=yes multicast=yes port=twisted pair speed=10Gbit/s
*-network:4
description: Ethernet interface
physical id: 6
logical name: vethc1684d8
serial: 16:5f:7e:55:d2:b4
size: 10Gbit/s
capabilities: ethernet physical
configuration: autonegotiation=off broadcast=yes driver=veth driverversion=1.0 duplex=full link=yes multicast=yes port=twisted pair speed=10Gbit/s

Disabling WiFi fixes the issue but obviously I don't like such solution :)

What else can I do to:

1) Stop fan from constantly running when it's unneeded

2) Make sure CPU is used on full power

?