linux-kernel - ACPI crash on lid close

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Mon, 10 Nov 2008 16:11:05 +0000
From:	Matthew Garrett <mjg59@...f.ucam.org>
To:	linux-acpi@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org
Subject: ACPI crash on lid close - SMP race?

If the _DOS flag on my HP 2510p is set to 0 (ie, signal OS when screen 
notification is requested, don't change automatically) then it'll crash 
on random lid open/closes. The trace generally makes little sense and 
depends on the kernel version and phase of the moon. I'd ignored this as 
firmware brokenness up until lately, but since having _DOS set to 0 is 
the only way to get a notification when the display switch key is 
pressed on this machine I'd be interested in fixing it properly. 

Unfortunately, I've got no real idea what on earth is going on. The only 
clue I've found so far is that booting with maxcpus=1 leaves it working 
perfectly. What parts of the ACPI stack could be triggering this?

-- 
Matthew Garrett | mjg59@...f.ucam.org
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/