From: "Vadim A. Misbakh-Soloviov" <mva@mva.name>
To: linux-acpi@vger.kernel.org
Subject: [Regression] acpi_rsdp doesn't work in 3.12.{5-6}
Date: Sun, 29 Dec 2013 17:34:46 +0700 [thread overview]
Message-ID: <1441555.SfFoqOgBsH@note> (raw)
Hello there!
Unfortunately I've server, that requires to manually point kernel to RSDP-
table. Otherwise ACPI doesn't work properly and kernel limits processors to 1.
All the time until upgrade to 3.12.5/3.12.6 I did it by specifying
acpi_rsdp=0x7F1F7000 to the kernel cmdline (where 0x7F1F7000 is real address
of RSDP table) and all worked fine. But now, after the upgrade, kernel can't
find RSDP table anyway, even with redefinition in cmdline, and so it prints
> [ 0.000000] ACPI BIOS Error (bug): A valid RSDP was not found
(20130725/tbxfroot-212)
And boots just like I don't specified real RSDT table address for it (with 1
processor and with broken acpi functionality).
As far, as I investigated, probleam appeared after
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=40031da445fb4d269af9c7c445b2adf674f171e7
Unfortunately, I can't fully bisect it and get exact place.
Can you advice me, if it is possible to redefine RSDP table now, in 3.12, and
how? And if it should use same syntax — why it stop working?
--
Best regsrds,
mva
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next reply other threads:[~2013-12-29 10:34 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-29 10:34 Vadim A. Misbakh-Soloviov [this message]
2013-12-29 14:25 ` [Regression] acpi_rsdp doesn't work in 3.12.{5-6} Rafael J. Wysocki
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