Bug 182082

Summary:	KWin runs only on one screen in dual TwinView setup
Product:	[Plasma] kwin	Reporter:	Arne Schmitz <arne.schmitz>
Component:	multi-screen	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED DUPLICATE
Severity:	normal	CC:	imehl_adresse, lemma
Priority:	NOR
Version:	unspecified
Target Milestone:	---
Platform:	Debian testing
OS:	Unspecified
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description Arne Schmitz 2009-01-27 12:28:13 UTC

Version:            (using KDE 3.5.9)
Installed from:    Debian testing/unstable Packages

What I did:

I have a machine with two graphics cards, each having two DVI outputs. I connected 4 screens to those cards, each card functioning in TwinView clone mode (for stereo rendering), both cards combined to form two X displays, :0.0 and :0.1.

What I expected:

I expected kwin to manage both screens.

What I got instead:

Kwin runs only on :0.0, but not on :0.1, while the rest of KDE correctly shows up on the second screen.  I can manually run a second kwin, but that is just a workaround.

Comment 1 Michael Leupold 2010-10-10 13:33:12 UTC

Unfortunately none of us have such a setup. Can you still reproduce this bug using a recent version of KDE (eg. KDE 4.5)?

Comment 2 imehl_adresse 2010-11-10 13:05:05 UTC

I can confirm this with kde-4.5.3 on gentoo.

I have 2 graphics and 3 displays. 

kwin only starts on DISPLAY=:0.0 but not on :0.1.

Also Kephal couldnt detect multi displays, if a display is on the second GFX.k

Comment 3 imehl_adresse 2010-11-10 13:06:14 UTC

I can confirm this with kde-4.5.3 on gentoo using fglrx

I have 2 graphics and 3 displays. 

kwin only starts on DISPLAY=:0.0 but not on :0.1.

Also Kephal couldnt detect multi displays, if a display is on the second GFX.

Comment 4 Thomas Lübking 2010-11-10 18:37:50 UTC

see bug #256242

Comment 5 Martin Flöser 2011-01-22 12:56:38 UTC

it should be possible to start kwin on the second head. It just does not start automatically.

*** This bug has been marked as a duplicate of bug 256242 ***