Bug 16318

Summary: macbook pro 5,1 does not boot with acpi
Product: ACPI Reporter: syamajala
Component: OtherAssignee: acpi_other
Status: CLOSED INSUFFICIENT_DATA    
Severity: normal CC: lenb, maciej.rutecki, rjw, rui.zhang
Priority: P1    
Hardware: All   
OS: Linux   
Kernel Version: 2.6.34 Subsystem:
Regression: Yes Bisected commit-id:
Bug Depends on:    
Bug Blocks: 15310    

Description syamajala 2010-06-30 13:38:03 UTC 
The macbook pro 5,1 model no longer boots with acpi enabled. I can only get my system to boot with acpi=off. I tried kernel 2.6.33 and everything seems to work. When using 2.6.34 my system hangs at waiting for udev uevents to be processed. I'm trying to figure out how I can get more info. I will also try 2.6.35-rc3.
Comment 1 Zhang Rui 2010-07-01 05:43:51 UTC 
I'm not aware of any 2.6.34 regressions like this.
can you use git-bisect to find out which commit introduces this bug?

cc Rafael, as this should be on 2.6.34 regressions list.
Comment 2 syamajala 2010-07-10 15:38:07 UTC 
I can try, I have no experience with git though.
Comment 3 Len Brown 2010-07-13 01:59:06 UTC 
lots of git bisect howto's, like this one:
http://ivanz.com/2009/03/27/git-bisect-the-awesome-way-to-find-the-mr-bug-commit/

also, the man page itself:

http://www.kernel.org/pub/software/scm/git/docs/git-bisect.html

One guess would be drivers/acpi/ec.c
so you might do something simple like limit the bisect to that file,
or to drivers/acpi/
Comment 4 syamajala 2010-07-23 12:20:47 UTC 
I'm not sure if I built my kernels correctly using git bisect.

I used my distributions kernel config file when I was building my kernels, but I stripped the config down a little, because it was building a lot of stuff I didn't need as modules. After going through all the git bisect steps and having each kernel work, I realized the problem must be in one of the things I didn't build as a module. So, this either might not be an upstream problem, or it might not be an acpi problem, because I was able to get my system to boot with acpi enabled with every single git bisect kernel.