[gentoo-user] New machine: Contents of display are offset around 2 inches from the left hand side.

[Alan Mackenzie <acm@muc.de>]

Hello, Gentoo.

Thanks to everybody who helped me get my video going in the other thread.

I've now got a more puzzling problem:  Every time I boot up my new
machine, the 1920x1080 pixel display is offset by around 2 inches from
the left hand side (and aroun 1 cm from the top).  It still appears to be
1920x1080 pixels (more precisely, 240 columns x 67 lines of 16x8
characters), but it's not filling the screen.

The screen itself is attached to a KVM box, and it works just fine on the
old machine.  So it's not the physical display which is at fault.  It's
an around 10 year old Samsung digital monitor, not some ancient CRT, or
anything like that.  It's interface is a DVI cable.

I seem to remember it filled the screen when it was new (on Monday).

Part of my efforts to make the video work (see other thread) involved
giving the kernel the drm.edid_firmware parameter.  This parameter is
intended to compensate for the display/KVM box/whatever failing to supply
the correct EDID information to the PC.  One of the settings I tried
involved the offsets from the left and top mentioned above.  But somehow
they seem to have got stuck in the machine.  It seems the BIOS has saved
the offsets in the CMOS or something.  I don't know how to undo these
saved settings.

Would somebody please help me on this, too.

Thanks!

-- 
Alan Mackenzie (Nuremberg, Germany).