linux-kernel - [bisected] PS/2 keyboard and mouse dead on resume on Intel D845BG

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Message-Id: <201210071513.27959.linux@rainbow-software.org>
Date:	Sun, 7 Oct 2012 15:13:27 +0200
From:	Ondrej Zary <linux@...nbow-software.org>
To:	Matthew Garrett <mjg@...hat.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>, Len Brown <len.brown@...el.com>
Cc:	linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org
Subject: [bisected] PS/2 keyboard and mouse dead on resume on Intel D845BG

Hello,
Intel D845BG board comes out of S3 with PS/2 keyboard and mouse completely 
dead. The machine works otherwise (with USB keyboard or over network). When 
rebooted in this state, the BIOS hangs with blank screen. I have the latest 
BIOS installed (P08).

Old kernels worked. Bisection pointed to commit: 
b6dacf63e9fb2e7a1369843d6cef332f76fca6a3
(ACPI: Unconditionally set SCI_EN on resume)

Commenting out this line in drivers/acpi/sleep.c:
	acpi_write_bit_register(ACPI_BITREG_SCI_ENABLE, 1);
fixes the problem.

Any ideas why this breaks on this system?

-- 
Ondrej Zary
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