AMD 7770 Ubuntu 12.04 - 3 monitors

[The Midnighter]

Hi,

Running ubuntu 12.04 LTS,
I have an AMD 7770, I have 2 monitors hooked up to the 7770 using DVI cables, I have a 3rd using a Displayport - DVI cable. Ubuntu detects that all 3 monitors exist, but will not allow me to display pictures on all 3 at the same time - any 2 at any time, but not the 3rd.

When I try in Displays I receive the following error:

requested position/size for CRTC 148 is outside the allowed limit: position=(3840, 0), size=(1920, 1080), maximum=(3840, 1920)

failed to apply configuration
GDBus.Errorrg.gtk.GDBus.UnmappedGError.Quark._gnome_2drr_2derror_2dquark.Code3: requested position/size for CRTC 148 is outside the allowed limit: position=(3840, 0), size=(1920, 1080), maximum=(3840, 1920)

When I try in the CCC Panel, it appears to succed, asks me to reboot and then starts up with 2 monitors again, with the 3rd disabled.

please help, thanks

 

[bigbasedrum]

It looks to me like Ubuntu doesn't want to support those high resolutions, but I'm just guessing. Try turning down the resolution on all the monitors to the lowest level and try again if it works then, then you know what the problem was.

 

[The Midnighter]

It looks to me like Ubuntu doesn't want to support those high resolutions, but I'm just guessing. Try turning down the resolution on all the monitors to the lowest level and try again if it works then, then you know what the problem was.

Hi, thanks for your reply. Sadly the exact same error message occured when I attempted this, I did attempt to set the 3rd monitor to the same low resolution with the same results.

Thanks,