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Re: [Libreboot] new T400 beta ROMs for testing

From: persmule
Subject: Re: [Libreboot] new T400 beta ROMs for testing
Date: Sat, 20 Aug 2016 08:57:10 +0800
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Hi Leah,

Till now, what I get is that the revision you update the coreboot
revision (1a3cfd3ca6c59c49349925b25e30f6308c47fb26, using cb revision
d83b0e9ac4174cca92ac2c3b83a7e8491a9a1ff4) failed to init EC on t400s (if
I restart instead of shutdown the computer after flashing the rom when
EC is functional, EC will be functional after reboot), and the revision
just before that (1095b5fd5a01c2392bab878fbc41b0c2f5a661d8, using cb
revision 2a3434757ef425dbdfedf1fc69e1a033a6e7310d) starts EC properly.
And I failed to build the combination of (1095b5f,d83b0e9) due to some
compilation error.


在 2016年08月19日 12:54, Persmule 写道:
> Hi Leah,
> I manage to do bisect myself.
> I have noticed that the coreboot revision used by t400 has changed
> around Jul 17:
>> $ git diff 23048a4 HEAD
>> resources/libreboot/config/grub/t400_8mb/cbrevision
>> diff --git a/resources/libreboot/config/grub/t400_8mb/cbrevision
>> b/resources/libreboot/config/grub/t400_8mb/cbrevision
>> index 1ab8299..d4e47be 100644
>> --- a/resources/libreboot/config/grub/t400_8mb/cbrevision
>> +++ b/resources/libreboot/config/grub/t400_8mb/cbrevision
>> @@ -1 +1 @@
>> -2a3434757ef425dbdfedf1fc69e1a033a6e7310d
>> +d83b0e9ac4174cca92ac2c3b83a7e8491a9a1ff4
> Is it possible to do bisect like below?
>> start bisect on coreboot's repository between the two revision, then
>> write the current coreboot revision number given by $git show -s to
>> resources/libreboot/config/grub/t400_?mb/cbrevision, then build
>> libreboot as usual and flash and test, then mark the current revision
>> on coreboot's repository and recurse.
> Persmule
> 在 2016年08月11日 18:27, Leah Rowe 写道:
>> Hi Persmule,
>> Op 11/08/16 om 03:46 schreef Persmule:
>> > Hi all,
>> > Sorry, the different byte is actually 0x14 (024 in octal) in the
>> > older and 0x24 (044 in octal) in the newer. I used "$cmp -bl" to
>> > search the possible difference, which print the different byte in
>> > octal.
>> I made some changes to ich9gen, relating to the descriptor, some time
>> ago. We found for instance that the "component density" section was
>> wrong, so we fixed that. There were some other minor changes. Users
>> have reported working wifi with those newer descriptors in earlier
>> snapshots. The 96 snapshot uses a new revision of coreboot and as far
>> as I know, this is all that has changed, aside from some minor patches
>> changed which also shouldn't (in my opinion) affect wifi. We think
>> upstream (coreboot project) might have broken it, so someone will have
>> to bisect coreboot to see if there is a regression, and if so on what
>> commit.

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