Different version of EDID, blank screen

RealUseR · 01-25-2019, 03:35 AM

My problem is i can't get laptop monitor working with kernel 4.19.17, but still working with kernel 4.4.14.
When i see Xorg.log i find that there is different EDID versions, i the strange is that with newer kernel EDID version is lower.
Xorg.log with kernel version 4.19.17:

Quote:

[ 25.513] (II) NOUVEAU(0): EDID for output LVDS-1
[ 25.545] (II) NOUVEAU(0): EDID for output DP-1
[ 25.577] (II) NOUVEAU(0): EDID for output DP-2
[ 25.580] (II) NOUVEAU(0): EDID for output eDP-1
[ 25.664] (II) NOUVEAU(0): EDID for output DP-3
[ 25.664] (II) NOUVEAU(0): Manufacturer: HWP Model: a72 Serial#: 16843009
[ 25.664] (II) NOUVEAU(0): Year: 2006 Week: 12
[ 25.664] (II) NOUVEAU(0): EDID Version: 1.3
[ 25.664] (II) NOUVEAU(0): Digital Display Input
[ 25.664] (II) NOUVEAU(0): Max Image Size [cm]: horiz.: 41 vert.: 31

Xorg.log with kernel version 4.4.14:

Quote:

[ 19.693] (II) NOUVEAU(0): EDID for output LVDS-1
[ 19.725] (II) NOUVEAU(0): EDID for output DP-1
[ 19.757] (II) NOUVEAU(0): EDID for output DP-2
[ 19.763] (II) NOUVEAU(0): EDID for output eDP-1
[ 19.763] (II) NOUVEAU(0): Manufacturer: LGD Model: 220 Serial#: 0
[ 19.763] (II) NOUVEAU(0): Year: 2009 Week: 0
[ 19.763] (II) NOUVEAU(0): EDID Version: 1.4
[ 19.763] (II) NOUVEAU(0): Digital Display Input
[ 19.763] (II) NOUVEAU(0): 10 bits per channel
[ 19.763] (II) NOUVEAU(0): Digital interface is undefined
[ 19.763] (II) NOUVEAU(0): Max Image Size [cm]: horiz.: 35 vert.: 19

When i boot with kernel 4.19.17 i get message:
18.956416 nouveau 0000:01:00.0: DRM: DDC responded, but no edid for eDP-1
This is before startx, i try with different xorg.conf parameters but not solved the problem.
I also try with different kernel parameters in Lilo, but not solved the problem.

My question is where is this EDID file and can i copy the file with new version to older one?

smallpond · 01-25-2019, 10:11 AM

Does your laptop support two displays? It looks to me like it is choosing a different display first.

RealUseR · 01-25-2019, 12:13 PM

Quote:

Originally Posted by smallpond

Does your laptop support two displays? It looks to me like it is choosing a different display first.

Yes, when i use kernel 4.4.14 the external monitor and laptop screen is working perfectly. I can disable and enable one of them and also working at same time as clone of or extended is not a problem. The problem is why with newer kernel is loading older version of EDID?
And there is something else

Quote:

8.540005] [drm] forcing eDP-1 connector off

RealUseR · 01-26-2019, 11:46 AM

The problem is in driver, i try to boot with EDID from 4.4.14 version, but not solve the problem. The EDID was assignet to DP-3 instead of eDP-1 and no chance to activate eDP-1. I install the driver from nvidia.com and works perfectly. It's very strange because i expect with newer kernel to have better drivers, but in this case with newer kernel support goes down.
I'm sure there is another people with the same or similar problem like this. I hope kernel developers to fix driver problem in next versions.
My laptop is HP EliteBook 8570w with separate video card Quadro K1000M and S-IPS 10bit display LP156WF3-SLB3. Its shame current kernel don't support this.