[NVA8] The DisplayPort screen does not light up at first try on Linux 3.16
Submitted by Martin Peres @mupuf
Assigned to Nouveau Project
Description
Created attachment 104148
When the DP screen doesn't light up
Hey Ben,
Oddly-enough, my DP screen at work does not want to light up after a cold boot but works if I reboot right away.
As I told you before, this screen is weird when it comes to coming back from sleep mode.
The DVI screen lights up correctly but I doubt this issue is related to dual screen because I tried unplugging the DVI screen a while ago to investigate the resume issue and it didn't help.
I attached to the bug the kernel logs with nouveau.debug="PDISP=trace,I2C=trace,VBIOS=trace" for both the case when the screen doesn't light up and when it does.
Attachment 104148, "When the DP screen doesn't light up":
pdisp_bug_complete