Created attachment 143031
dmesg from thinkpad x1 extreme / GTX 1050 Ti on kernel 4.20 with hybrid graphics

I may be blind but I haven't seen anyone attaching full dmesg output,
sorry if I missed it.

The laptop in question is Thinkpad X1 Extreme with NVIDIA Corporation
GP107M [GeForce GTX 1050 Ti Mobile] (rev a1). It has a BIOS setting to
switch between "Hybrid" and "Discrete only" graphics.

This dmesg output is from a boot with "Hybrid" graphics, where running
'lspci' hangs and causes the system fans to spin. X server hangs on
start too (using modesetting DDX)

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https://bugs.launchpad.net/bugs/1729736

Title:
  10de:1c8c [MSI] Module nouveau fails to manage GeForce GTX 1050 Ti
  Mobile

Status in Linux:
  Confirmed
Status in linux package in Ubuntu:
  Confirmed

Bug description:
  Trying to use 'Nvidia GeForce GTX 1050 Ti Mobile' with 'Ubuntu 17.10
  (Artful)' :

  - Linux kernel 4.13.0-16 from 'Ubuntu 17.10 (Artful)' systematically
  fails (1 CPU stuck).

  - Linux kernel 4.14.0-041400rc7 from http://kernel.ubuntu.com/~kernel-
  ppa/mainline seems to succeed.

  See attached kern.log

  
  After reboot on Linux kernel 4.13.0-16 with nouveau blacklisted :

  $ lspci -nn -v -s 1:0.0

  01:00.0 3D controller [0302]: NVIDIA Corporation GP107M [GeForce GTX 1050 Ti 
Mobile] [10de:1c8c] (rev a1)
        Subsystem: Micro-Star International Co., Ltd. [MSI] GP107M [GeForce GTX 
1050 Ti Mobile] [1462:11c8]
        Flags: bus master, fast devsel, latency 0, IRQ 255
        Memory at de000000 (32-bit, non-prefetchable) [size=16M]
        Memory at c0000000 (64-bit, prefetchable) [size=256M]
        Memory at d0000000 (64-bit, prefetchable) [size=32M]
        I/O ports at e000 [disabled] [size=128]
        Expansion ROM at df000000 [disabled] [size=512K]
        Capabilities: <access denied>
        Kernel modules: nvidiafb, nouveau

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