Bug#572537: udev spins on drm device
 

reassign 572537 linux-2.6
thanks

On Mar 04, Tony Mantler <nicoya@ubb.ca> wrote:

> It seems that a few minutes after waking my laptop from sleep I'll often
> notice a sudden jump in system activity. I've traced this back to udev
> looping on the graphics drm device for some reason. Running udevd --debug
> results in the following messages looped over and over:
Kernel issue.

--
ciao,
Marco

Bug#572537: udev spins on drm device
 

On Mar 04, Tony Mantler <nicoya@ubb.ca> wrote:
> It seems that a few minutes after waking my laptop from sleep I'll often
> notice a sudden jump in system activity. I've traced this back to udev
> looping on the graphics drm device for some reason. Running udevd --debug
> results in the following messages looped over and over:

There have been a number of recent fixes to the i915 driver which
handles Intel graphics devices. Can you reproduce this with the current
kernel version in unstable (2.6.32-9) or the version in experimental
(2.6.33-1~experimental.3)?

Ben.

--
Ben Hutchings
I say we take off; nuke the site from orbit. It's the only way to be sure.

Bug#572537: udev spins on drm device
 

On 14-Mar-10, at 6:17 PM, Ben Hutchings wrote:


On Mar 04, Tony Mantler <nicoya@ubb.ca> wrote:
It seems that a few minutes after waking my laptop from sleep I'll
often
notice a sudden jump in system activity. I've traced this back to
udev
looping on the graphics drm device for some reason. Running udevd --
debug

results in the following messages looped over and over:


There have been a number of recent fixes to the i915 driver which
handles Intel graphics devices. Can you reproduce this with the
current

kernel version in unstable (2.6.32-9) or the version in experimental
(2.6.33-1~experimental.3)?



Yes, this repros with 2.6.32-9.


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Bug#572537: udev spins on drm device
 

On Sun, Mar 14, 2010 at 06:56:19PM -0500, Tony Mantler wrote:
>
> On 14-Mar-10, at 6:17 PM, Ben Hutchings wrote:
>
> >On Mar 04, Tony Mantler <nicoya@ubb.ca> wrote:
> >>It seems that a few minutes after waking my laptop from sleep I'll
> >>often
> >>notice a sudden jump in system activity. I've traced this back to
> >>udev
> >>looping on the graphics drm device for some reason. Running udevd --
> >>debug
> >>results in the following messages looped over and over:
> >
> >There have been a number of recent fixes to the i915 driver which
> >handles Intel graphics devices. Can you reproduce this with the
> >current
> >kernel version in unstable (2.6.32-9) or the version in experimental
> >(2.6.33-1~experimental.3)?
>
>
> Yes, this repros with 2.6.32-9.

and what about 2.6.33 in experimental?

if yes please file a bug upstream in bugzilla.kernel.org and let
us know the bug nr so that we can track it.
thanks



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Bug#572537: udev spins on drm device
 

On Sun, 2010-03-14 at 18:56 -0500, Tony Mantler wrote:
> On 14-Mar-10, at 6:17 PM, Ben Hutchings wrote:
>
> > On Mar 04, Tony Mantler <nicoya@ubb.ca> wrote:
> >> It seems that a few minutes after waking my laptop from sleep I'll
> >> often
> >> notice a sudden jump in system activity. I've traced this back to
> >> udev
> >> looping on the graphics drm device for some reason. Running udevd --
> >> debug
> >> results in the following messages looped over and over:
> >
> > There have been a number of recent fixes to the i915 driver which
> > handles Intel graphics devices. Can you reproduce this with the
> > current
> > kernel version in unstable (2.6.32-9) or the version in experimental
> > (2.6.33-1~experimental.3)?
>
>
> Yes, this repros with 2.6.32-9.

In that case, please report this bug upstream at
<http://bugzilla.freedesktop.org>. Specify the product as 'DRI' and
component as 'DRM/Intel'. Include the kernel version (you can specify
that the Debian kernel package is based on upstream 2.6.32.9), the udev
log and the output of the command 'lspci -vvn -s 00:02.1'. Let us know
the bug number so we can track it.

Ben.

--
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I say we take off; nuke the site from orbit. It's the only way to be sure.

Bug#572537: udev spins on drm device
 

On Mon, Mar 15, 2010 at 12:43:18AM +0000, Ben Hutchings wrote:
> On Sun, 2010-03-14 at 18:56 -0500, Tony Mantler wrote:
> > On 14-Mar-10, at 6:17 PM, Ben Hutchings wrote:
> >
> > > On Mar 04, Tony Mantler <nicoya@ubb.ca> wrote:
> > >> It seems that a few minutes after waking my laptop from sleep I'll
> > >> often
> > >> notice a sudden jump in system activity. I've traced this back to
> > >> udev
> > >> looping on the graphics drm device for some reason. Running udevd --
> > >> debug
> > >> results in the following messages looped over and over:
> > >
> > > There have been a number of recent fixes to the i915 driver which
> > > handles Intel graphics devices. Can you reproduce this with the
> > > current
> > > kernel version in unstable (2.6.32-9) or the version in experimental
> > > (2.6.33-1~experimental.3)?
> >
> >
> > Yes, this repros with 2.6.32-9.
>
> In that case, please report this bug upstream at
> <http://bugzilla.freedesktop.org>. Specify the product as 'DRI' and
> component as 'DRM/Intel'. Include the kernel version (you can specify
> that the Debian kernel package is based on upstream 2.6.32.9), the udev
> log and the output of the command 'lspci -vvn -s 00:02.1'. Let us know
> the bug number so we can track it.

Tony, did you report this upstream?

Cheers,
Moritz



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Bug#572537: udev spins on drm device
 

On 2-May-10, at 12:45 PM, Moritz Muehlenhoff wrote:


On Mon, Mar 15, 2010 at 12:43:18AM +0000, Ben Hutchings wrote:

In that case, please report this bug upstream at
<http://bugzilla.freedesktop.org>. Specify the product as 'DRI' and
component as 'DRM/Intel'. Include the kernel version (you can
specify
that the Debian kernel package is based on upstream 2.6.32.9), the
udev
log and the output of the command 'lspci -vvn -s 00:02.1'. Let us
know

the bug number so we can track it.


Tony, did you report this upstream?




Not yet, sorry. Things got busy here and I had to push it on the
backburner. I'll get to it now.


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Bug#572537: udev spins on drm device
 

On 2-May-10, at 12:45 PM, Moritz Muehlenhoff wrote:


Tony, did you report this upstream?



This is done now.

https://bugs.freedesktop.org/show_bug.cgi?id=27941

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Bug#572537: udev spins on drm device
 

Hi Tony,

Tony Mantler wrote:

> It seems that a few minutes after waking my laptop from sleep I'll often
> notice a sudden jump in system activity. I've traced this back to udev
> looping on the graphics drm device for some reason. Running udevd --debug
> results in the following messages looped over and over:
[...]
> [13925] event_queue_insert: seq 189967 queued, 'change' 'drm'
> [13925] udev_monitor_send_device: passed 200 bytes to monitor 0x23d72d0
[...]
> [13925] event_queue_delete: seq 189967 done with 0
>
> Putting the laptop to sleep and then waking it up again "warm" seems to
> clear the problem such that it does not reoccur again until the next time
> I wake the system "cold".

Thanks for a pleasant report. What kernel are you using these days?
If you try the kernel from squeeze, can you still reproduce this? (It
should work install without trouble on a wheezy/sid system.) Would
you be interested in pursuing a fix for this in squeeze (for example
by testing patches)?

Curious,
Jonathan



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Bug#572537: udev spins on drm device
 

On 2012-03-28, at 4:51 PM, Jonathan Nieder wrote:

> Hi Tony,
>
> Tony Mantler wrote:
>
>> It seems that a few minutes after waking my laptop from sleep I'll often
>> notice a sudden jump in system activity. I've traced this back to udev
>> looping on the graphics drm device for some reason. Running udevd --debug
>> results in the following messages looped over and over:
> [...]
>> [13925] event_queue_insert: seq 189967 queued, 'change' 'drm'
>> [13925] udev_monitor_send_device: passed 200 bytes to monitor 0x23d72d0
> [...]
>> [13925] event_queue_delete: seq 189967 done with 0
>>
>> Putting the laptop to sleep and then waking it up again "warm" seems to
>> clear the problem such that it does not reoccur again until the next time
>> I wake the system "cold".
>
> Thanks for a pleasant report. What kernel are you using these days?
> If you try the kernel from squeeze, can you still reproduce this? (It
> should work install without trouble on a wheezy/sid system.) Would
> you be interested in pursuing a fix for this in squeeze (for example
> by testing patches)?

Yes, I'm still getting the issue, sort of. My understanding is that some parts of the hotplug pipeline have moved around, but I still get a spam of hotplug events from the graphics that nearly kills the system after waking up. The most reliable way to trigger it is to wake from sleep, open firefox (iceweasel), and play a youtube video (flash). The symptoms will often occur without going through these exact steps though.

Executing the command "intel_reg_write 0x61110 0x0" as root stops the hotplug spam and restores system functionality, though this also apparently stops all hotplug events so the system won't detect attaching an external monitor or something to the VGA port.

I'm currently running linux-image-2.3.0-2-amd64 package version 3.2.12-1.

I could certainly test patched kernels, as I can very reliably reproduce the problem.

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