On 07/13/2018 02:34 PM, Carlos E. R. wrote:
On 2018-07-13 19:28, David C. Rankin wrote:
The only other thought I had was to make sure you do not have other xf86 drivers installed. It would be odd that there was a conflict, but if you have multiple drivers installed and nothing black-listed, I can see issues there. It also sounds like you have multiple cards in your laptop -- I don't know if you can select/disable one in the BIOS, but that would be something else to investigate.
He has Optimus, so dual video hardware. One Intel, another Nvidia. On Windows this works (they say) perfect: on battery it uses Intel, and when the wall power is connected it switches automatically to Nvidia. Or switch when you want high performance.
This combination works one year yes, another no on Linux. With different levels of "working".
Ah! So this is a case where Linux has a good Intel Driver, and a good Nvidia driver, but only windows has a good Optimus driver that makes use of both depending on laptop power. Why couldn't he just configure systemd somewhere to only publish "plugged-in" and exclusively use Nvidia, or the other way around and only use Intel? Is there a kernel parameter or systemd or sysfs entry that can control this? -- David C. Rankin, J.D.,P.E.