Picture exceeds actual display on one of two DFPs... DVI->HDMI

[kot]

Hello!

For a while we had two very different LCD-displays connected to this computer and things were working properly.

We now replaced the older display with a shiny new one and the picture on it is annoyingly wrong: all four edges can not be seen as if the picture is bigger, than the actual screen...

The troublesome monitor (DFP-0) does not have a DVI-connector and connects via a DVI->HDMI cable. The older (DFP-1) connects with a regular DVI-cable and "just works". They are the same size and come from the same manufacturer. The native resolution of both is 1920x1080 and the MetaModes settings in my xorg.conf says: "1920x1080,1920x1080".

The two monitors are identified as (full Xorg.log with verbosity set to 9 is attached):

--- EDID for ViewSonic VX2753 SERIES (DFP-0) ---
NVIDIA(0): EDID Version : 1.3
NVIDIA(0): Manufacturer : VSC
NVIDIA(0): Monitor Name : ViewSonic VX2753 SERIES
NVIDIA(0): Product ID : 29224
NVIDIA(0): 32-bit Serial Number : 16843009
NVIDIA(0): Serial Number String : SG8112611096
NVIDIA(0): Manufacture Date : 2011, week 26
NVIDIA(0): DPMS Capabilities : Active Off
NVIDIA(0): Prefer first detailed timing : Yes
NVIDIA(0): Supports GTF : No
NVIDIA(0): Maximum Image Size : 600mm x 340mm
NVIDIA(0): Valid HSync Range : 15.0 kHz - 83.0 kHz
NVIDIA(0): Valid VRefresh Range : 50 Hz - 76 Hz
NVIDIA(0): EDID maximum pixel clock : 190.0 MHz

--- EDID for ViewSonic VX2739 Series (DFP-1) ---
NVIDIA(0): EDID Version : 1.3
NVIDIA(0): Manufacturer : VSC
NVIDIA(0): Monitor Name : ViewSonic VX2739 Series
NVIDIA(0): Product ID : 16164
NVIDIA(0): 32-bit Serial Number : 2265
NVIDIA(0): Serial Number String : RKD104622265
NVIDIA(0): Manufacture Date : 2010, week 46
NVIDIA(0): DPMS Capabilities : Active Off
NVIDIA(0): Prefer first detailed timing : Yes
NVIDIA(0): Supports GTF : No
NVIDIA(0): Maximum Image Size : 600mm x 340mm
NVIDIA(0): Valid HSync Range : 24.0 kHz - 83.0 kHz
NVIDIA(0): Valid VRefresh Range : 50 Hz - 76 Hz
NVIDIA(0): EDID maximum pixel clock : 180.0 MHz

How do I force the DFP-0 monitor to show full picture properly? Or is DVI->HDMI conversion somehow responsible? Thanks!

[Chronos_]

Necromancer mode

Since this hasn't been answered, I'll have a go. Usually, this is something to do with the "overscan" or "scaling" setting on the display itself, not the driver/card setup. It's unique to HDMI, which is why your DVI equipped display doesn't show the "problem" (it's actually a feature, but not in this situation), and you'll need to go through your OSD menu and find the relevant bit to tweak. On mine it would be scaling, set to 1:1 to disable overscan.