Created attachment 118705 [details]
I have been adviced by dmesg to create a bug report here. So, here it is.
$ uname -m
$ uname -r
Display Connectors: Docked Thinkpad T450s, with two monitors attached via Display Port
Linux Distro: Arch Linux
Created attachment 118706 [details]
For both bugs:
- Hung happening on "render" ring,
- Application is "Xorg",
- HW/PCI_ID is "0x1616",
- Instruction/IPETH is "0x7a000004"
*** This bug has been marked as a duplicate of bug 94780 ***