Bug 75513

Summary:	MatchPnPID doesn't work on devices with a deep parent hierarchy
Product:	xorg	Reporter:	Peter Hutterer <peter.hutterer>
Component:	Server/Input/Core	Assignee:	Peter Hutterer <peter.hutterer>
Status:	RESOLVED FIXED	QA Contact:	Xorg Project Team <xorg-team>
Severity:	normal
Priority:	medium	CC:	benjamin.tissoires, peter.hutterer
Version:	git
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:
Bug Depends on:
Bug Blocks:	74544

Description Peter Hutterer 2014-02-26 00:17:13 UTC

The PnPID may be set on a device's parent, but not necessarily on the immediate parent. The server should run up the whole device tree to find the first PnPID instead.

This fixes some of the issues with the T440 where the PnPID is set several parents up from the touchpad device. Requires the patch below though:
https://lkml.org/lkml/2014/2/23/63

Comment 1 Peter Hutterer 2014-02-26 01:16:52 UTC

http://patchwork.freedesktop.org/patch/21074/

Comment 2 Peter Hutterer 2014-03-12 05:25:44 UTC

commit 795066477ee81b5b82e490eac8bed6b656d01f17
Author: Peter Hutterer <peter.hutterer@who-t.net>
Date:   Wed Feb 26 07:54:56 2014 +1000

    config: search for PnPID on all parents (#75513)

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