http://bugzilla.kernel.org/show_bug.cgi?id=10448
------- Comment #44 from [EMAIL PROTECTED] 2008-05-22 05:14 -------
OK, I did a bisection based on the Ubuntu kernel. This leads to the following
commit that introduces the hang again after it was working correctly with the
8.04 beta kernel as confirmed by Sam:
----------
commit 69ed7d7e1807eb9071d85861062cf23db71c2910
Author: Stefan Bader <[EMAIL PROTECTED]>
Date: Wed Mar 26 12:02:47 2008 -0400
Revert "ACPI: video: Ignore ACPI video devices that aren't present in
hardware"
Bug: #197929
This patch is reverted because it introduced regressions on working
laptops.
http://bugzilla.kernel.org/show_bug.cgi?id=9995
This reverts commit 50bcae78c21bf5c69d72ede68c8a00e12ab95618.
Signed-off-by: Stefan Bader <[EMAIL PROTECTED]>
----------
So probably the commit that fixes things for us is this one:
----------
commit 50bcae78c21bf5c69d72ede68c8a00e12ab95618
Author: Matthew Garrett <[EMAIL PROTECTED]>
Date: Thu Feb 7 01:44:06 2008 +0000
ACPI: video: Ignore ACPI video devices that aren't present in hardware
Vendors often ship machines with a choice of integrated or discrete
graphics, and use the same DSDT for both. As a result, the ACPI video
module will locate devices that may not exist on this specific platform.
Attempt to determine whether the device exists or not, and abort the
device creation if it do not exist.
Signed-off-by: Matthew Garrett <[EMAIL PROTECTED]>
Signed-off-by: Len Brown <[EMAIL PROTECTED]>
----------
Both commits are Ubuntu-specific.
In Linus' tree the commits are:
----------
commit f0d6752c9fa51d24c86b57c76ec5b2926a716b23
Author: Len Brown <[EMAIL PROTECTED]>
Date: Tue Mar 18 01:43:53 2008 -0400
Revert "ACPI: video: Ignore ACPI video devices that aren't present in
hardware"
This reverts commit 3fa2cdcc45a0176de15cac9dbf4ed2834ebf8932.
http://bugzilla.kernel.org/show_bug.cgi?id=9995
Signed-off-by: Len Brown <len.brown>
commit 3fa2cdcc45a0176de15cac9dbf4ed2834ebf8932
Author: Matthew Garrett <[EMAIL PROTECTED]>
Date: Thu Feb 7 01:44:06 2008 +0000
ACPI: video: Ignore ACPI video devices that aren't present in hardware
Vendors often ship machines with a choice of integrated or discrete
graphics, and use the same DSDT for both. As a result, the ACPI video
module will locate devices that may not exist on this specific platform.
Attempt to determine whether the device exists or not, and abort the
device creation if it do not exist.
Signed-off-by: Matthew Garrett <[EMAIL PROTECTED]>
Signed-off-by: Len Brown <[EMAIL PROTECTED]>
----------
Zhang, does this information help you? Can do anything else?
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