* Re: [Bug 57961] ExpressCard hot-remove and hot-add not recognized by acpiphp
[not found] ` <bug-57961-41252-X2PJk78p44@https.bugzilla.kernel.org/>
@ 2013-08-23 14:58 ` Bjorn Helgaas
2013-08-23 19:54 ` Leho Kraav
0 siblings, 1 reply; 6+ messages in thread
From: Bjorn Helgaas @ 2013-08-23 14:58 UTC (permalink / raw)
To: leho; +Cc: linux-pci, linux-acpi
[+cc linux-pci, linux-acpi, switch to email for now]
On Fri, Aug 23, 2013 at 7:34 AM, <bugzilla-daemon@bugzilla.kernel.org> wrote:
> https://bugzilla.kernel.org/show_bug.cgi?id=57961
> ...
> I'm arriving here from googling "_handle_hotplug_event_root Bus check notify on
> \_SB_.PCI0".
Huh, interesting. I didn't think the kernel bugzilla was visible to
search engines (I wish it were). But maybe Google just found an email
that mentioned the URL?
> My Dell L421X is spitting this notification both when I close and open the
> laptop lid, one each. No ACPI LID event is emitted, which doesn't seem right.
Can you post a complete dmesg log including a lid close/event cycle?
> Running on 3.10.6. Is this bug related in any way?
Bug 57961 is for ExpressCard changes that we didn't handle correctly.
It doesn't sound like you're adding or removing an ExpressCard, so
you're likely seeing a different problem.
Is the problem that (1) you see "_handle_hotplug_event_root Bus check
notify on \_SB_.PCI0" messages that you don't expect, and (2) you do
not see LID events, which you do expect?
Is there anything that is not actually working correctly, or is it
just messages that don't seem right?
Bjorn
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [Bug 57961] ExpressCard hot-remove and hot-add not recognized by acpiphp
2013-08-23 14:58 ` [Bug 57961] ExpressCard hot-remove and hot-add not recognized by acpiphp Bjorn Helgaas
@ 2013-08-23 19:54 ` Leho Kraav
2013-08-23 20:31 ` Bjorn Helgaas
0 siblings, 1 reply; 6+ messages in thread
From: Leho Kraav @ 2013-08-23 19:54 UTC (permalink / raw)
To: Bjorn Helgaas; +Cc: linux-pci, linux-acpi
On 23.08.2013 17:58, Bjorn Helgaas wrote:
> [+cc linux-pci, linux-acpi, switch to email for now]
>
> On Fri, Aug 23, 2013 at 7:34 AM, <bugzilla-daemon@bugzilla.kernel.org> wrote:
>> https://bugzilla.kernel.org/show_bug.cgi?id=57961
>> ...
>> I'm arriving here from googling "_handle_hotplug_event_root Bus check notify on
>> \_SB_.PCI0".
>
> Huh, interesting. I didn't think the kernel bugzilla was visible to
> search engines (I wish it were). But maybe Google just found an email
> that mentioned the URL?
Yes, I actually got there through LKML http://lkml.org/lkml/2013/5/10/432
>> My Dell L421X is spitting this notification both when I close and open the
>> laptop lid, one each. No ACPI LID event is emitted, which doesn't seem right.
>
> Can you post a complete dmesg log including a lid close/event cycle?
E-mailed that to you personally.
>> Running on 3.10.6. Is this bug related in any way?
>
> Bug 57961 is for ExpressCard changes that we didn't handle correctly.
> It doesn't sound like you're adding or removing an ExpressCard, so
> you're likely seeing a different problem.
>
> Is the problem that (1) you see "_handle_hotplug_event_root Bus check
> notify on \_SB_.PCI0" messages that you don't expect, and (2) you do
> not see LID events, which you do expect?
>
> Is there anything that is not actually working correctly, or is it
> just messages that don't seem right?
Mailing list thread discussed some apparently significant ACPI changes
in 3.10. I've yet to have a laptop that didn't emit an ACPI LID event.
Instead the kernel does emit something that looks like something is not
quite what it should be. I'm wondering if I have missed something in
kernel configuration or am I somehow affected by the recent ACPI changes
or a machine specific bug somewhere. Dells are among the
Linux-friendliest machines throughout history, that makes me think it
could be the kernel.
You're right, I'm not on the acpiphp bus for sure, but sometimes things
are related at a level above so I took a shot at trying to find out
what's happening.
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [Bug 57961] ExpressCard hot-remove and hot-add not recognized by acpiphp
2013-08-23 19:54 ` Leho Kraav
@ 2013-08-23 20:31 ` Bjorn Helgaas
2013-08-23 20:35 ` Leho Kraav
0 siblings, 1 reply; 6+ messages in thread
From: Bjorn Helgaas @ 2013-08-23 20:31 UTC (permalink / raw)
To: Leho Kraav; +Cc: linux-pci, linux-acpi
On Fri, Aug 23, 2013 at 1:54 PM, Leho Kraav <leho@kraav.com> wrote:
> On 23.08.2013 17:58, Bjorn Helgaas wrote:
>>
>> [+cc linux-pci, linux-acpi, switch to email for now]
>>
>> On Fri, Aug 23, 2013 at 7:34 AM, <bugzilla-daemon@bugzilla.kernel.org>
>> wrote:
>>>
>>> https://bugzilla.kernel.org/show_bug.cgi?id=57961
>>> ...
>>> I'm arriving here from googling "_handle_hotplug_event_root Bus check
>>> notify on
>>> \_SB_.PCI0".
>>> My Dell L421X is spitting this notification both when I close and open
>>> the
>>> laptop lid, one each. No ACPI LID event is emitted, which doesn't seem
>>> right.
>>
>>
>> Can you post a complete dmesg log including a lid close/event cycle?
>
>
> E-mailed that to you personally.
>
>
>>> Running on 3.10.6. Is this bug related in any way?
>>
>>
>> Bug 57961 is for ExpressCard changes that we didn't handle correctly.
>> It doesn't sound like you're adding or removing an ExpressCard, so
>> you're likely seeing a different problem.
>>
>> Is the problem that (1) you see "_handle_hotplug_event_root Bus check
>> notify on \_SB_.PCI0" messages that you don't expect, and (2) you do
>> not see LID events, which you do expect?
>>
>> Is there anything that is not actually working correctly, or is it
>> just messages that don't seem right?
>
>
> Mailing list thread discussed some apparently significant ACPI changes in
> 3.10. I've yet to have a laptop that didn't emit an ACPI LID event. Instead
> the kernel does emit something that looks like something is not quite what
> it should be. I'm wondering if I have missed something in kernel
> configuration or am I somehow affected by the recent ACPI changes or a
> machine specific bug somewhere. Dells are among the Linux-friendliest
> machines throughout history, that makes me think it could be the kernel.
>
> You're right, I'm not on the acpiphp bus for sure, but sometimes things are
> related at a level above so I took a shot at trying to find out what's
> happening.
I don't know anything about the LID notifications.
As far as the bus checks on \_SB_.PCI0, I think that message is new or
possibly we register for those notifications on more devices that we
previously did. If your laptop suspended when closing the lid, it
doesn't surprise me that we get the Bus Check on resume, because that
might be the only way we could discover device additions or removals
that happened while suspended. I'm not sure why we would get them on
suspend.
Regardless, we can't change the fact that the BIOS sends us those
notification events. We could change or remove the message, but I
suspect we might want to keep it for debugging purposes for a while,
since we're actively working in that area.
Bjorn
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [Bug 57961] ExpressCard hot-remove and hot-add not recognized by acpiphp
2013-08-23 20:31 ` Bjorn Helgaas
@ 2013-08-23 20:35 ` Leho Kraav
2013-08-23 20:40 ` Bjorn Helgaas
0 siblings, 1 reply; 6+ messages in thread
From: Leho Kraav @ 2013-08-23 20:35 UTC (permalink / raw)
To: Bjorn Helgaas; +Cc: linux-pci, linux-acpi
>
> I don't know anything about the LID notifications.
>
> As far as the bus checks on \_SB_.PCI0, I think that message is new or
> possibly we register for those notifications on more devices that we
> previously did. If your laptop suspended when closing the lid, it
> doesn't surprise me that we get the Bus Check on resume, because that
> might be the only way we could discover device additions or removals
> that happened while suspended. I'm not sure why we would get them on
> suspend.
I don't suspend on lid close, actually. I close the lid just to carry
the laptop around, and always suspend manually.
Thanks for taking a look. I guess the key takeaway here is that the
notify message is harmless and I should look at somewhere else to figure
out why I'm not getting a LID event.
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [Bug 57961] ExpressCard hot-remove and hot-add not recognized by acpiphp
2013-08-23 20:35 ` Leho Kraav
@ 2013-08-23 20:40 ` Bjorn Helgaas
[not found] ` <5217C985.20103@kraav.com>
0 siblings, 1 reply; 6+ messages in thread
From: Bjorn Helgaas @ 2013-08-23 20:40 UTC (permalink / raw)
To: Leho Kraav; +Cc: linux-pci, linux-acpi, Rafael J. Wysocki
[+cc Rafael]
On Fri, Aug 23, 2013 at 2:35 PM, Leho Kraav <leho@kraav.com> wrote:
>>
>> I don't know anything about the LID notifications.
>>
>> As far as the bus checks on \_SB_.PCI0, I think that message is new or
>> possibly we register for those notifications on more devices that we
>> previously did. If your laptop suspended when closing the lid, it
>> doesn't surprise me that we get the Bus Check on resume, because that
>> might be the only way we could discover device additions or removals
>> that happened while suspended. I'm not sure why we would get them on
>> suspend.
>
>
> I don't suspend on lid close, actually. I close the lid just to carry the
> laptop around, and always suspend manually.
>
> Thanks for taking a look. I guess the key takeaway here is that the notify
> message is harmless and I should look at somewhere else to figure out why
> I'm not getting a LID event.
Huh. That's strange. I don't know why you would get bus checks on
lid open/close events when you're not suspending/resuming. Maybe
Rafael will have some ideas.
If you can collect an acpidump, that might have a clue, too. At
least, we ought to be able to see a method that is sending the Notify
to the PCI host bridge.
Bjorn
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [Bug 57961] ExpressCard hot-remove and hot-add not recognized by acpiphp
[not found] ` <5217C985.20103@kraav.com>
@ 2013-08-23 20:52 ` Bjorn Helgaas
0 siblings, 0 replies; 6+ messages in thread
From: Bjorn Helgaas @ 2013-08-23 20:52 UTC (permalink / raw)
To: Leho Kraav; +Cc: linux-pci, linux-acpi, Rafael J. Wysocki
On Fri, Aug 23, 2013 at 2:43 PM, Leho Kraav <leho@kraav.com> wrote:
> On 23.08.2013 23:40, Bjorn Helgaas wrote:
>>
>> [+cc Rafael]
>>
>> On Fri, Aug 23, 2013 at 2:35 PM, Leho Kraav <leho@kraav.com> wrote:
>>>
>>>
>>> I don't suspend on lid close, actually. I close the lid just to carry the
>>> laptop around, and always suspend manually.
>>>
>> Huh. That's strange. I don't know why you would get bus checks on
>> lid open/close events when you're not suspending/resuming. Maybe
>> Rafael will have some ideas.
>>
>> If you can collect an acpidump, that might have a clue, too. At
>> least, we ought to be able to see a method that is sending the Notify
>> to the PCI host bridge.
>
>
> acpidump attached
Method (GNOT, 2, NotSerialized)
Notify (PCI0, Arg1)
Notify (GFX0, Arg1)
I wonder if this bus check on lid open/close has something to do with
telling us that we should re-evaluate which monitors are present or
useful. In any case, I think I'm out of my depth.
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2013-08-23 20:52 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
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[not found] <bug-57961-41252@https.bugzilla.kernel.org/>
[not found] ` <bug-57961-41252-X2PJk78p44@https.bugzilla.kernel.org/>
2013-08-23 14:58 ` [Bug 57961] ExpressCard hot-remove and hot-add not recognized by acpiphp Bjorn Helgaas
2013-08-23 19:54 ` Leho Kraav
2013-08-23 20:31 ` Bjorn Helgaas
2013-08-23 20:35 ` Leho Kraav
2013-08-23 20:40 ` Bjorn Helgaas
[not found] ` <5217C985.20103@kraav.com>
2013-08-23 20:52 ` Bjorn Helgaas
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