linux-kernel - [REGRESSION] Xorg doesn't like 4e8b14526 "time: Improve sanity checking of timekeeping inputs"

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Message-ID: <20120831040500.GA6090@amos.fritz.box>
Date:	Fri, 31 Aug 2012 06:05:00 +0200
From:	Andreas Bombe <aeb@...ian.org>
To:	linux-kernel@...r.kernel.org
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	John Stultz <johnstul@...ibm.com>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: [REGRESSION] Xorg doesn't like 4e8b14526 "time: Improve sanity
 checking of timekeeping inputs"

I have recently started to get problems with X simply shutting itself
down and returning to the login screen. In the X logs I find:

> [  1492.936] 
> Fatal server error:
> [  1492.936] WaitForSomething(): select: Invalid argument

No messages whatsoever is found in the kernel logs. This error happens
randomly without any correlation to user input, but with a high
likelihood (within a few minutes at most) when a video is playing. It
doesn't matter if the video is in Flash in a browser window or in a
video player playing a local file.

With that somewhat easy test I bisected it down to 4e8b14526 "time:
Improve sanity checking of timekeeping inputs". The latest Linus git
(155e36d40) with a revert of the bisected commit does not show the
problem.

Video is Radeon HD 6950 with open source drivers. Xorg version is the
one currently in Debian unstable (xserver-xorg-core: 2:1.12.3.902-1,
xserver-xorg-video-radeon: 1:6.14.4-5, libdrm: 2.4.33-3).

-- 
Andreas Bombe
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