nanoDLP

colgeocol

Member

Registered: 2016-09-14

Posts: 23

4K calibration

Shahin,

I've got a few questions to ask.

I'm using a 2160x3840 LCD display.  Following is my config.txt file.

force_turbo=1
gpu_mem=192
dtparam=audio=on
hdmi_group=2
hdmi_mode=87
hdmi_cvt 2160 3840 24
disable_overscan=1
max_framebuffer_width=2160
max_framebuffer_height=3840
hdmi_pixel_freq_limit=400000000
hvs_priority=0x32ff
framebuffer_depth=16
framebuffer_ignore_alpha=1

I went to the calibration page and selected the white grid.

The bottom and left lines are thicker than the top and right lines.  Is this normal?

I then selected the boundary image.

Boundary doesn't show up on right side.

Is my config file correct?

Are the pictures placed at the lower left or are they centered?

Any suggestions?  I'm sure I'll be able to use the display as currently configured if it can't be fixed.

Thanks for all your hard work.

Shahin

Administrator

Registered: 2016-02-17

Posts: 3,544

Re: 4K calibration

Looks like display causing the first issue. As I know it is not possible to fix the issue using config.txt.

For the second one, maybe over-scanning on the right side could fix it.

colgeocol

Member

Registered: 2016-09-14

Posts: 23

Re: 4K calibration

Shahin,

Sorry, I tried over-scanning on the right and it didn't do anything.

I did notice when I did the grid and then the boundary, I noticed that the right side line just faded away.

I just generated my own 2160x3840 boundary file and displayed it using the fbi command.  Exactly the same results.

It is the display causing the problem.  I can still use it.  I just have to keep anything away from the right side.

Thanks again and have a good day.