search

rockowitz / ddcutil

Control monitor settings using DDC/CI and USB
http://www.ddcutil.com
GNU General Public License v2.0
978 stars 40 forks source link

LG-27UD49 DisplayPort failed to detect #51

Closed evansan closed 6 years ago

evansan commented 6 years ago

interrogate.log

evansan commented 6 years ago

I have RX 470 Kernel is 4.15.12-1-zen driver is amdgpu

rockowitz commented 6 years ago

1) Module i2c-dev is required but not loaded.   The I2C devices exist in /sys/bus/i2c/devices but not /dev/i2c-* are not present.   

If loading i2c-dev does not resolve the problem, read on ...

2) The output of "ddcutil environment" is one part of "ddcutil interrogate", and its output can be hard to spot.  It provides suggestions for resolving problems.  Run it standalone and see what it suggests.

3) Install i2c-tools.  Program i2cdetect can be helpful.

4) I see you're running a custom Zen kernel.  What is the relation of ddcutil to the virtualization? (The config files are not in the expected location in /boot, but I doubt there's much to be found there.)

5) I see you're running XWayland.  Unfortunately, I've not been able to get it running on any of my systems, so no experience in this regard.

6) ddcci is listed in DKMS, but it's not clear if it's loaded.  May present a conflict.

Sanford

On 03/25/2018 12:13 AM, evansan wrote:

interrogate.log https://github.com/rockowitz/ddcutil/files/1845011/interrogate.log

— You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub https://github.com/rockowitz/ddcutil/issues/51, or mute the thread https://github.com/notifications/unsubscribe-auth/ANhsbjsk2e52adNzFEd4jk3cDVLB3Tw4ks5thxmEgaJpZM4S6AVb.

evansan commented 6 years ago

solved by loading i2c-dev

rockowitz commented 6 years ago

Thanks for posting the resolution.

On 04/02/2018 12:43 AM, evansan wrote:

solved by loading i2c-dev

— You are receiving this because you commented. Reply to this email directly, view it on GitHub https://github.com/rockowitz/ddcutil/issues/51#issuecomment-377853369, or mute the thread https://github.com/notifications/unsubscribe-auth/ANhsbpg1mmvWOdnh8Wco5zpDPvuYZOQ_ks5tkayAgaJpZM4S6AVb.