Bug 55752

Summary:	Export API update_desktop_dimensions()
Product:	xorg	Reporter:	Olivier Fourdan <fourdan>
Component:	Server/Input/Core	Assignee:	Xorg Project Team <xorg-team>
Status:	RESOLVED FIXED	QA Contact:	Xorg Project Team <xorg-team>
Severity:	normal
Priority:	medium	CC:	peter.hutterer
Version:	git
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:

Description Olivier Fourdan 2012-10-08 07:36:35 UTC

Please change update_desktop_dimensions() from _X_HIDDEN to _X_EXPORT in input.h so that 3rd party driver can make use of it to update the ScreenPtr and pScrnInfo when resizing the X screen.

Comment 1 Julien Cristau 2012-10-08 07:39:28 UTC

http://lists.x.org/pipermail/xorg-devel/2012-October/033901.html

Comment 2 Peter Hutterer 2012-10-08 23:03:20 UTC

Further explanation on this bug:

update_desktop_dimensions() was added to servers 1.12 and later to update the internal representation the server has of the total desktop area (all outputs together). The input code uses those dimensions to apply the transformation matrix. The call to update_desktop_dimensions() is in the part of the server that is circumvented by the NVIDIA binary driver. Output reconfigurations are thus not reflected in the input code, leading to erroneous device-to-screen mappings.

A new call xf86UpdateDesktopDimensions() was provided upstream together with a minor ABI version bump to allow for the NVIDIA driver to detect and utilise that call.

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