Re: gcm does not detect second monitor

[Gys van Zyl <gysvanzyl gmail com>]

This is what I ended up doing for the second monitor:

Create a profile:
dispcal -yl -v -d2 -g 2.2 -o acer1
targen -v -d3 -G -f500 acer
dispread -yl -v -d 2 -k acer1.cal acer
colprof -yl -v -A "Acer" -M "P235H" -D "Huey 2011-06-24" -qu -as acer

Apply the profile at every startup:
dispwin -d 2 -v -I /home/gys/.color/icc/acer.icc

This seems to work OK, at least I get colors that pretty much match
between the two monitors.

------
Gys



On Mon, Jun 27, 2011 at 4:12 PM, Richard Hughes <hughsient gmail com> wrote:
>
> On 24 June 2011 17:50, Gys van Zyl <gysvanzyl gmail com> wrote:
> > Using a Dell laptop with ubuntu 11.04 and ATI FGLRX display drivers. I have
> > successfully created a profile for the laptop's display, but the second
> > monitor that is attached is not detected by gcm. The "monitor settings"
> > application in ubuntu also shows the second monitor as "unknown". The second
> > monitor is properly recognized in ATI's catalyst control center software. Is
> > this a problem with the proprietary drivers?
>
> Yes, if I remember correctly the ATI proprietary driver doesn't work
> with xrandr 1.3 properly, and the non-primary monitor EDIDs don't get
> detected properly.
>
> > Is there a workaround for this problem? I could remove the proprietary
> > drivers and try to create profiles, but then how do I apply them once I
> > re-install the drivers? If I use the open source drivers, the laptop's fan
> > goes at full speed all the time, so I can't really use this driver in the
> > long term.
>
> I'm not sure there's much of a workaround. You could try profiling
> with the free drivers, and then associating the new profile with the
> "unknown" monitor with the non-free drivers, but the real fix is the
> fix the free drivers power saving unfortunately.
>
> > By blindly following some instructions I found on the web I've managed to
> > create a profile for the second monitor using argyll commands, but I'm not
> > sure how to apply it with gcm.
> > Any ideas that I could try?
>
> You can "import" the manually created profile by clicking on the
> unknown device and trying to add a profile.
>
> Richard.