linux-kernel - Re: 2.6.25-rc7: Ugh.

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Date:	Thu, 27 Mar 2008 21:57:55 -0400
From:	Mark Lord <lkml@....ca>
To:	Jiri Kosina <jkosina@...e.cz>
Cc:	Greg KH <gregkh@...e.de>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	linux-usb@...r.kernel.org, Pavel Machek <pavel@...e.cz>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: 2.6.25-rc7:  Ugh.

Jiri Kosina wrote:
> On Thu, 27 Mar 2008, Greg KH wrote:
> 
>>> It boots, but just a simple suspend/resume (RAM) was enough to kill 
>>> it. It comes back on resume, with an X desktop again, but with no USB 
>>> functionality -- no mouse.
>>> The keyboard still works, so I dropped to a console and tried:
>>>   rmmod usbhid
>>>   insmod usbhid
>>> And the console hung at 100% CPU on the insmod.
>> Haven't heard of this one before sorry.  Jiri, have you?
> 
> No, haven't heard anything similar either. Mark, are you able to collect 
> the stacktraces via alt-sysrq-t at the time the system goes crazy?
..

No where practical to capture them to.
I don't know if the machine was entirely dead,
or just the console at that point.

> Also, as you seem to be able to easily reproduce the bug, git-bisect might 
> reveal the culprit easily. For start, you can try to bisect only let's say 
> usb, hid and acpi code probably ... ?
..

I don't have the XX days necessary for git-bisect right now.
But if there were some likely candidates, I could probably try a couple.
Mostly I just wanted to give a heads-up that all is not well with 2.6.25
for now, and I'll get round to debugging it when I have time to do so.

I haven't yet tried -rc7 on my *other* dissimilar notebook,
but back at -rc2 it also had serious issues with suspend/resume not working.
This is my first look at 2.6.25 (on notebooks) since then.

.. 
>>> kernel: [  111.361099] pciehp_resume ENTRY
>>> kernel: [  112.362047] pciehp: Device 0000:0c:00.0 already exists at c:0, 
>>> cannot hot-add
>>> kernel: [  112.362052] pciehp: Cannot add device 0xc:0
> 
> Hmm, what device is this?
..

Wireless PCIe card on internal slot -- Intel 3945ABG.

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