From mboxrd@z Thu Jan  1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 34252] Unexpected behaviour when switching video cards with
	vga_switcheroo
Date: Wed, 11 May 2011 22:49:37 GMT
Message-ID: <201105112249.p4BMnbL6013778@demeter2.kernel.org>
References: <bug-34252-2300@https.bugzilla.kernel.org/>
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https://bugzilla.kernel.org/show_bug.cgi?id=34252





--- Comment #9 from Igor Murzov <e-mail@date.by>  2011-05-11 22:49:30 ---
> What was the behavior before v2.6.38-rc4?

On 2.6.37.6 nothing happens if card is already active:

# cat /sys/kernel/debug/vgaswitcheroo/switch
0:+:Pwr:0000:01:05.0
1: :Pwr:0000:02:00.0
# echo IGD > /sys/kernel/debug/vgaswitcheroo/switch
# cat /sys/kernel/debug/vgaswitcheroo/switch
0:+:Pwr:0000:01:05.0
1: :Pwr:0000:02:00.0

> Anyway, I presume working around that in userspace is not the issue?

You are right. I wrote simple script for this already. Thanks.

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