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Chat Area => General Discussion Area => Topic started by: Gaffers on 19 March 2010, 20:22:26

Title: For the Linux Geeks
Post by: Gaffers on 19 March 2010, 20:22:26

trying to use xrandr to interogate the graphics settings as the gdm app throws out a signal the monitor cannot support.  I keep getting the error "Can't open display"

Searched the web and everyone who gets this error gets silence from the linux community  :-/

Help!

Title: Re: For the Linux Geeks
Post by: Andy H on 19 March 2010, 21:06:29

man xrandr

Quote

XRANDR(1)

NAME
       xrandr - primitive command line interface to RandR extension

I have never use RandR or xrandr, what do you need to use it for?

Which distribution are you running?

Title: Re: For the Linux Geeks
Post by: Kevin Wood on 19 March 2010, 21:09:29

Hmm. Haven't had to play with Linux display configuration for many years. Normally works out of the box these days. I remember it being a batsrad though. :(

Will have a dig.

Kevin

Title: Re: For the Linux Geeks
Post by: Andy H on 19 March 2010, 21:09:46

On Debian I would start by checking /var/log/Xorg.0.log

Also would type

lspci

to list the pci devices recognised on the machine.

Title: Re: For the Linux Geeks
Post by: Gaffers on 19 March 2010, 23:10:07

Found the problem.

Startup would be ok until the KDU loaded, then I would get an 'Out of range' message from the monitor.  It all pointed to the wrong resolution/freq setting.  Eventually tried the onboard graphics but not before going down a rabbit hole of xrandr and xorg.conf manipulations but all at the command prompt by switching displays using ALT+CNTL+Fx.  Now I am in the GUI and downloading the linux drivers for my radeon gfx card :y

Slowly getting back into the Linux groove  8-)

Title: Re: For the Linux Geeks
Post by: Gaffers on 19 March 2010, 23:23:17

By the way, loving the speed of this compared to Windows 7  :y