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Date:      Wed, 12 Sep 2012 15:54:30 +0300
From:      Andriy Gapon <avg@FreeBSD.org>
To:        Lars Engels <lars.engels@0x20.net>
Cc:        Thomas Steen Rasmussen <thomas@gibfest.dk>, freebsd-stable@FreeBSD.org
Subject:   Re: Thinkpad X61s cannot boot 9.1-BETA1
Message-ID:  <50508606.4040704@FreeBSD.org>
In-Reply-To: <20120912113425.GK20762@e-new.0x20.net>
References:  <5007CFE6.6030808@intersonic.se> <500853DA.8050502@intersonic.se> <loom.20120720T160400-766@post.gmane.org> <201207311632.30938.jhb@freebsd.org> <alpine.BSF.2.00.1208211948290.2749@thinkpad.nowhere.local> <20120822093317.GW32916@e-new.0x20.net> <5034D4CD.4030301@gibfest.dk> <20120822165239.GX32916@e-new.0x20.net> <50351EA4.4040401@gibfest.dk> <20120912113425.GK20762@e-new.0x20.net>

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on 12/09/2012 14:34 Lars Engels said the following:
> On Wed, Aug 22, 2012 at 08:02:12PM +0200, Thomas Steen Rasmussen wrote:
>>
>> -----BEGIN PGP SIGNED MESSAGE-----
>> Hash: SHA1
>>  
>> On 22-08-2012 18:52, Lars Engels wrote:
>>> On Wed, Aug 22, 2012 at 02:47:09PM +0200, Thomas Steen Rasmussen wrote:
>>>>
>>>> On 22-08-2012 11:33, Lars Engels wrote:
>>>>>
>>>>> I have a T61 running 9.1-BETA1 (with PC-BSD). In most cases it is
>>>>> booting fine, but from time to time it hangs at boot time but the last
>>>>> lines are uhub0: ... to uhub4
>>>>> Is that the same or a different issue?
>>>> Hello,
>>>>
>>>> I have that exact issue on an X301 after upgrading from 9.0 to
>>>> 9-STABLE a little while ago. It feels like it happens mostly when
>>>> rebooting from Windows to FreeBSD (dualboot machine), but I've
>>>> seen it from a cold boot as well. I've never seen it twice in
>>>> a row - turning the machine off and on again (by holding the
>>>> power button down) and it boots normally the next time.
>>>>
>>>> I am willing to test patches or enable extra debugging, or
>>>> help out any other way I can :)
>>>
>>> Have you ever seen that with verbose boot enabled?
>> Hello,
>>
>> No, but I can boot verbosely the next times I boot and see if it comes up ?
> 
> Meanwhile I found out what's the cause of it. On 9.x it only hung from
> time to time, but I tried a few weeks old CURRENT and it hung at every
> boot at the same time.
> With enabled verbose boot it looked like this:
> http://bsd-geek.de/FreeBSD/IMAG0190.jpg
> 
> Then I removed the AC cable and booted from battery and that worked. So
> it seems to me that some ACPI change in CURRENT made the situation even
> worse.
> 

Could you try to play with different eventtimer settings (preferably in current) ?
You can use this thread / PR as a guide:
http://thread.gmane.org/gmane.os.freebsd.devel.amd64/14480/focus=14495

The place where boot stop looks suspiciously close to the place where timer
interrupts should start driving the system.

-- 
Andriy Gapon



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