Hardware: Lenovo Thinkpad P40 Yoga, Intel Intel HD 520 + Nvidia Quadro M500M (2GB DDR3)

GPU Hang
log shows:
i915 0000:00:02.0: [drm] GPU HANG: ecode 9:1:85dffffb, in gnome-shell [3088]

No problem when dual-booting into Windows

Solutions tried

1. 1. Kernel updated to: Linux 5.19.5-051905-generic x86_64
      (problem persists)

1. 1. a setting in the Lenovo bios. I changed graphics mode from “Switchable Graphics” to “Discrete Only”.
      (problem persists)

1. 1. nomodeset
      https://www.dell.com/support/kbdoc/en-ca/000123893/manual-nomodeset-kernel-boot-line-option-for-linux-booting?lang=en

ahci.mobile_lpm_policy=1

intel_idle.max_cstate=1 and/or i915.enable_dc=0

GRUB line was
“GRUB_CMDLINE_LINUX_DEFAULT=”acpi_osi=! acpi_osi=’Windows 2009′ quiet splash intel_iommu=off””

 

4. Environment variable:

Fixing GPU Hangs on Intel HD Graphics 520 (and maybe other iGPUs) from linux

and sudo apt-get install libgl1-amber-dri

and
sudo apt-get install libegl-amber0

and

libglx-amber0