After reading tons and tons of manuals and forums about the problem I need to ask myself, because I can't figure out what's wrong.

In my new PC there's a GTX 660 connected to LG Flatron L1730S using D-SUB / DVI connetor. This monitor is able to work at 1280x1024 with 75 Hz refresh rate and I'm not able to set it anyhow.

I can create a new mode in xrandr but I can't connect it with DVI-I-0 output to which my monitor is connected.


xrandr --addmode DVI-I-0 1280x1024_75.00

I get this:

X Error of failed request:  BadMatch (invalid parameter attributes)
Major opcode of failed request:  140 (RANDR)
Minor opcode of failed request:  18 (RRAddOutputMode)
Serial number of failed request:  39
Current serial number in output stream:  40

It's been two days now, and at 60 Hz I get my screen is flickering.

Please, help me get it right.

PS. I use nV proprietary 331.113

  • Are you using a converter or a connector? – Fabby Mar 20 '15 at 21:28

Okay, I got what the problem really was - it was related with the connector I used. There's no way to fix it another than changing connector to converter as far as I'm concerned.

  • That's why I asked you this 5 months ago... (see above) – Fabby Aug 12 '15 at 10:00

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