Comment 33 for bug 1556459

Revision history for this message
Nastooh (navesta) wrote :

Got this working, based on the comments above (Thank you all), using the following steps:
1- Disable PRIME in BIOS
2- Select Discrete Graphics in BIOS
3- Update /etc/default/grub to include
GRUB_CMDLINE_LINUX_DEFAULT="thinkpad-acpi.brightness_enable=1 acpi_backlight=vendor"
4- update-grub
5- apt-get remove --purge "nvidia*"
6- Add https://launchpad.net/~oibaf/+archive/ubuntu/graphics-drivers PPA
7- apt update && apt -y upgrade
8- Select Nouveau as display driver, under Software & Updates, Additional Drivers tab

After reboot, I am able to use LVDS, VGA and DVI. The only snag is that contrast cannot be controlled via keyboard, due to Step 3, above. As a work around, I do:
echo x | sudo tee /sys/class/backlight/nv_backlight/brightness, where x is between 0 to cat /sys/class/backlight/nv_backlight/max_brightness.
So far, it has been a very good experience, with glxgear showing 60 fps and fan running quieter. Cheers,