From: Mikael Pettersson <mikpe@csd.uu.se>
To: Ruben Puettmann <ruben@puettmann.net>
Cc: linux-kernel@vger.kernel.org
Subject: Re: 2.4.22 APM problems with IBM Thinkpad's
Date: Wed, 13 Aug 2003 15:13:02 +0200 [thread overview]
Message-ID: <16186.14686.455795.927909@gargle.gargle.HOWL> (raw)
In-Reply-To: <20030813123119.GA25111@puettmann.net>
Ruben Puettmann writes:
>
> hy,
>
> cause many problems with acpi I try to get apm running on my ibm
> thinkpad R40 ( 2722). But with 2.4.22-pre10 and 2.4.22-pre10-ac1.
>
> Problems which happend:
>
> apm -s don't work with radeonfb usb and so on see my mails on lkm the
> last days
>
> If CONFIG_APM_DISPLAY_BLANK is Y the thinkpad freezed on blanking the
> display
This sounds like a well-known APM/local-APIC clash.
Never ever use DISPLAY_BLANK if you also have SMP or UP_APIC.
With APIC support enabled (SMP or UP_APIC), APM must be constrained:
DISPLAY_BLANK off
CPU_IDLE off
built-in driver, not module
This is because the apm driver does BIOS calls, and many BIOSen
(including the code in graphics cards, e.g. all Radeons it seems)
like to hang if a local APIC timer interrupt arrives.
next prev parent reply other threads:[~2003-08-13 13:13 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-08-13 12:31 Ruben Puettmann
2003-08-13 13:13 ` Mikael Pettersson [this message]
2003-08-13 13:31 ` Ruben Puettmann
2003-08-13 14:24 ` Mikael Pettersson
2003-08-13 14:11 ` Alan Cox
2003-08-13 14:32 ` Mikael Pettersson
2003-08-14 12:28 ` Ruben Puettmann
2003-08-14 13:21 ` Mikael Pettersson
2003-08-14 13:47 ` Alan Cox
2003-08-14 17:33 ` Jamie Lokier
2003-08-14 20:03 ` Mikael Pettersson
2003-08-14 21:40 ` Jamie Lokier
[not found] ` <20030813131043.GA1112@deimos.one.pl>
2003-08-13 13:35 ` Ruben Puettmann
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