rockowitz

@firmero Thank you for the **environment** output. It helps me get a better understanding on how /sys is used for MST, so that I can more definitively discard the "phantom"...

@julienfalque Please run **ddcutil interrogate** (as root if necessary) and submit the output as an attachment. Thank you.

The error your seeing is from reading the value after the write to verity that it has been set correctly. You can disable verification using option ***--noverify***. More generally, there's...

@tukusejssirs I've found a [thread](https://marc.info/?l=linux-i2c&w=2&r=1&s=i2c-nvidia-gpu&q=b) on the linux-i2c mailing list that may give some clues as to how to use the driver. See also this [bug report](https://bugzilla.kernel.org/show_bug.cgi?id=206653). ddcutil may be...

@24fpsDaVinci Hopefully this late reply is still of use to you. The **capabilities** command is the most problematic for DDC communication, since it strings together multiple I2C write/read sequences, each...

Have you tried swapping the monitors? Though the monitors have the same model string, the EDIDs show that they are slightly different. Does the problem stay with the monitor, or...

On 04/06/2017 08:10 PM, Jan wrote: > > I've not directly swapped the monitors due to a short DVI cable, but > the problem stays with the DP connection (same...

Gerben, Please run the following commands as root and send the output as an attachment. Without that output its hard for me to say much. # ddcutil environment --verbose #...

Gerben, Re the GTX980 report, the Acer monitor is connected on DP-3. What is strange is that it has 2 different I2C buses assigned, i2c-16 and i2c-19. I2C slave address...

Gerben, This pretty clearly is an amdgpu driver issue. Your HD7850 is a GCN 1.0 card, and support for these cards by the amdgpu driver is marginal. The logs show...