linux-kernel - [regression] hp-wmi: hangs system on boot

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Date:	Sat, 17 Jan 2009 00:13:54 +0100
From:	Frans Pop <elendil@...net.nl>
To:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Cc:	Larry Finger <Larry.Finger@...inger.net>,
	Matthew Garrett <mjg59@...f.ucam.org>,
	linux-acpi@...r.kernel.org
Subject: [regression] hp-wmi: hangs system on boot

When I first booted .29-rc2 my HP 2510p notebook hung while loading
hp-wmi, which I have listed in /etc/modules. Hard poweroff was needed.

The last line on the console was:
input: HP WMI hotkeys as /class/input/input11

After commenting out hp-wmi in /etc/modules the system booted correctly.

After the successful boot I tried loading the module manually using
modprobe, which resulted in:
input: HP WMI hotkeys as /class/input/input11
iwlagn: Radio Frequency Kill Switch is On:
Kill switch must be turned off for wireless networking to work.
wlan0: No ProbeResp from current AP 00:14:c1:38:e5:15 - assume out of range
iwlagn: Error sending REPLY_ADD_STA: enqueue_hcmd failed: -5
mac80211-phy0: failed to remove key (0, 00:14:c1:38:e5:15) from hardware (-5)
iwlagn: Error sending REPLY_ADD_STA: enqueue_hcmd failed: -5
mac80211-phy0: failed to remove key (1, ff:ff:ff:ff:ff:ff) from hardware (-5)

I also noticed that /sys/bus/platform/devices/hp-wmi/dock is missing.
And I lost my wireless connection.

Difference between loading hp-wmi from /etc/modules and manually could be
that normally wlan is started _after_ /etc/modules is processed. So with
the hang wlan was not yet active, while for the manual modprobe wlan was
active.

With 2.6.28 hp-wmi works perfectly.

System is running x84_64, Debian Lenny.

Cheers,
FJP
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