Bug 549710

Summary:	x11-drivers/xf86-video-nouveau: Xorg takes 100% CPU when using multiple independent screen configuration
Product:	Gentoo Linux	Reporter:	Matti Nykyri <matti.nykyri>
Component:	Current packages	Assignee:	Gentoo X packagers <x11>
Status:	RESOLVED WONTFIX
Severity:	normal	Keywords:	PATCH
Priority:	Normal
Version:	unspecified
Hardware:	All
OS:	Linux
See Also:	https://bugs.freedesktop.org/show_bug.cgi?id=90482
Whiteboard:
Package list:		Runtime testing required:	---
Attachments:	Wakeup handler for the FD Ebuild for the patch

Description Matti Nykyri 2015-05-17 12:04:08 UTC

With multiple screens nouveau driver opens udev socket, but does not register handler for it. This makes Xorg server never sleep after data comes available in the socket... E.I. the select returns immediately and the socket that had data gets never read.

The bug is reported upstream.

Reproducible: Always

Comment 1 Matti Nykyri 2015-05-17 12:07:39 UTC

Created attachment 403470 [details, diff]
Wakeup handler for the FD

Comment 2 Matti Nykyri 2015-05-17 12:08:45 UTC

Created attachment 403472 [details]
Ebuild for the patch

Comment 3 Matti Nykyri 2015-05-17 12:09:46 UTC

The patch is from upstream.

Comment 4 Chí-Thanh Christopher Nguyễn gentoo-dev

2015-10-29 18:00:30 UTC

That particular patch was never applied. Is this still an issue with latest xf86-video-nouveau?

Comment 5 Matti Nykyri 2015-10-29 21:25:59 UTC

This patch doesn't correct the problem correctly or completely. It makes the driver behave better but causes windomaker to crash if you cycle the power of your display. This needs more investigating. I don't think many people these days are having multiple screens or even multiple displays with nouveau driver :/

The bug can be closed. When the real problem solved I can open a new bug.