https://bugzilla.kernel.org/show_bug.cgi?id=56191
Summary: Intel Atom N2600 SoC hangs after 'isapnp: No Plug &
Play device found' when booting without acpi=off
Product: ACPI
Version: 2.5
Kernel Version: 3.9.0-rc4
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Config-Other
AssignedTo: acpi_config-ot...@kernel-bugs.osdl.org
ReportedBy: olivier+ker...@diotte.ca
CC: olivier+ker...@diotte.ca
Regression: No
Overview:
ACPI won't work on this board.
I have tried Ubuntu Precise Pangolin's 3.5.7.6 kernel
I have tried recompiling that kernel from source
I have tried recompiling 3.9.0-rc4 from Linus' git tree
None will allow me to boot.
The DSDT compiles without error (though there are a few warnings)
When run with "acpi.debug_layer=0xFFFFFFFF acpi.debug_level=0xFFFFFFFF" with
output going through a serial console, the boot seems to be caught in an
infinite loop. It's been running for at least 2 days and I have over 700 Mb of
initial log. I have stopped logging and only connect (serial console) to it
from time to time to see if it will hang.
I have already reported this issue on the linux-acpi mailing-list, but getting
no response I took the hint posting here might be a better idea :) .
Steps to Reproduce:
Boot without the acpi=off kernel parameter
Actual Results:
The platform always hangs before invoking login, but there doesn't seem to be a
clear hang point across kernel versions. I have a screen and keyboard, a serial
console and ssh access to the board. I am unable to get access through any of
those (and the board won't respond to ping) without acpi=off.
I have noticed that the board will sometimes display a "udevd started" line,
but even when disabling udev and booting in Ubuntu's rescue mode (kernel
parameters += "nomodeset rescue") I am still unable to get a login prompt or
get an ICMP reply.
Expected Results:
Boot correctly, replies to ICMP Requests/ping.
Build Date & Platform:
I have not yet found a kernel that works.
Additional Information:
I am currently reading the ACPI spec(s) and the source code in drivers/acpi/ to
try to do as much as possible on my own, but any hint would be useful.
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