Comment 47 for bug 1765363

Setting "nouveau.modeset=-1" does not help here. My DELL XPS L502X is still running hot:

<pre>
~$ sudo service lm-sensors status
● lm-sensors.service - Initialize hardware monitoring sensors
   Loaded: loaded (/lib/systemd/system/lm-sensors.service; enabled; vendor preset: enabled)
   Active: active (exited) since Thu 2018-06-07 20:18:15 CEST; 27min ago
  Process: 991 ExecStart=/usr/bin/sensors (code=exited, status=0/SUCCESS)
  Process: 807 ExecStart=/usr/bin/sensors -s (code=exited, status=0/SUCCESS)
 Main PID: 991 (code=exited, status=0/SUCCESS)

giu 07 20:18:15 xps sensors[991]: acpitz-virtual-0
giu 07 20:18:15 xps sensors[991]: Adapter: Virtual device
giu 07 20:18:15 xps sensors[991]: temp1: +96.0°C (crit = +100.0°C)
giu 07 20:18:15 xps sensors[991]: temp2: +96.0°C (crit = +100.0°C)
giu 07 20:18:15 xps sensors[991]: coretemp-isa-0000
giu 07 20:18:15 xps sensors[991]: Adapter: ISA adapter
giu 07 20:18:15 xps sensors[991]: Package id 0: +96.0°C (high = +86.0°C, crit = +100.0°C)
giu 07 20:18:15 xps sensors[991]: Core 0: +96.0°C (high = +86.0°C, crit = +100.0°C)
giu 07 20:18:15 xps sensors[991]: Core 1: +95.0°C (high = +86.0°C, crit = +100.0°C)
giu 07 20:18:15 xps systemd[1]: Started Initialize hardware monitoring sensors.
</pre>

<pre>
~$ cat /proc/cmdline
BOOT_IMAGE=/vmlinuz-4.15.0-22-lowlatency root=UUID=345b57d7-dea8-44de-a3c0-4614b87a4565 ro quiet splash video=VGA2:d nouveau.runpm=-1 vt.handoff=1

~$ cat /proc/acpi/bbswitch
0000:01:00.0 ON

~$ sudo cat /sys/kernel/debug/vgaswitcheroo/switch
0:IGD:+:Pwr:0000:00:02.0
1:DIS: :DynPwr:0000:01:00.0

~$ sudo lsmod | grep nouveau
nouveau 1716224 1
mxm_wmi 16384 1 nouveau
ttm 102400 1 nouveau
wmi 24576 5 dell_wmi,wmi_bmof,dell_wmi_descriptor,mxm_wmi,nouveau
i2c_algo_bit 16384 2 nouveau,i915
drm_kms_helper 167936 2 nouveau,i915
drm 397312 8 nouveau,i915,ttm,drm_kms_helper
video 40960 4 dell_wmi,dell_laptop,nouveau,i915

</pre>