Dual monitor not working on ATI RV370 - Sapphire X550 silent

[Alessandro Polverini]

I just installed Gutsy. I have this graphic card:
02:00.0 VGA compatible controller: ATI Technologies Inc RV370 [Sapphire X550 Silent]
02:00.1 Display controller: ATI Technologies Inc RV370 secondary [Sapphire X550 Silent]

The system configured it correctly but I'm unable to configure dual monitor, that's what happens:
- in the "screen and graphics preferences" applet the "secondary monitor" is disable
- the secondary graphic card is wrongly setup as "vesa"
- if I choose "ati" for the secondary card I still can't enable the second monitor

So I'm stuck with a single usable monitor.

[Alessandro Polverini (polve)]

I tried also installing proprietary drivers and the situation is the same: I can't enable the second monitor

[Brian Murray (brian-murray)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This bug did not have a package associated with it, which is important for ensuring that it gets looked at by the proper developers. You can learn more about finding the right package at https://wiki.ubuntu.com/Bugs/FindRightPackage. I have classified this bug as a bug in displayconfig-gtk.

[Victor Engmark (victor-engmark)]

Having the same problem here (Radeon X300SE, Gutsy), even with an xorg.conf (attached) which worked flawlessly in Feisty.

[Sebastian Heinlein (glatzor)]

The ati driver in Gutsy does not support Xinerama anymore, which DisplayConfigGTK uses. You have to wait for Gutsy+1, since we will then support RandR1.2. You can use the command xrandr to configure your second screen.

[Sebastian Heinlein (glatzor)]

Does work choosing the proprietary driver, closing displayconfiggtk and reopening it?

[Victor Engmark (victor-engmark)]

I got this working with the newest driver from ATI (http://ati.amd.com/support/drivers/linux/linux-radeon.html) and the attached X.org configuration file. HTH.

[Shahar Or (mightyiam)]

I think that the duplicate status is wrong.

I'm running 11.04 and in Monitor Preferences I see only one monitor when in fact two are connected and the display is cloned.

This is without a xorg.conf file.

My card is:
01:00.0 VGA compatible controller: ATI Technologies Inc RV370 5B60 [Radeon X300 (PCIE)]
01:00.1 Display controller: ATI Technologies Inc RV370 [Radeon X300SE]