Open VictorQueiroz opened 1 year ago
I'm afraid I don't have an answer for you. The Nvidia driver exports buses /dev/i2c-8 and /dev/i2c-9. ddcutil find an EDID on neither. Attempting to use DDC results a hard error (EIO). i2cdetect does not report slave addresses x50 (EDID) and x37 (DDC) as active, so this really is a low level problem. I do see that xrandr reports the EDID for the LG monitor. (It's manufacture date is 2015, which is recent in terms of DDC support.) But xrandr has ways other than I2C to access the EDID, e.g. by BIOS calls. All I can suggest is to try a different cable, or try using the nouveau open source driver.
Could this be related to issue #321.
When I run
ddcutil detect --verbose
, I get the following output:This is the output of
ddcutil interrogate
command:interrogate.txt
The actual problem is,
card0-eDP-1
is my laptop display, and I have a monitor connected through HDMI. I am usingoptimus-manager
to use thenvidia
driver. The external monitor does not work without nvidia driver.The main point is to be able to change the external monitor brightness using ddcutil, but I am unable to. How to fix that?
The external monitor is an old LG monitor, not sure if it's simply not supported.