[Bug 49943] radeon/drm: Hotplug udev events stop working

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=49943

Martin Peres  changed:

   What|Removed |Added

 Resolution|--- |MOVED
 Status|NEW |RESOLVED

--- Comment #11 from Martin Peres  ---
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been
closed from further activity.

You can subscribe and participate further through the new bug through this link
to our GitLab instance: https://gitlab.freedesktop.org/drm/amd/issues/272.

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initial displaylink kms driver + drm hotplug

[jason]

Hi, There,

Our company build an USB plug second display by using displaylink chip. 
Displaylink linux driver works Ubuntu 13.1 but not on 
(Ubuntu 12.04, or Red Hat/CentOS 5 and 6 (32/64 bit) and newer or Suse Linux 
Enterprise POS 11 (32/64 bit) and newer)

We need someone who can help to solve this issue. Can you refer someone to us 
as cousulant base? This is urgent so appreciate your reply ASAP.


Jason Hsia


??? iPad ??
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DRM Hotplug

[David Herrmann]

Hi

On Sat, Feb 8, 2014 at 1:16 AM, Rian Quinn  wrote:
> I noticed that the hotplug IOTCLs were removed. How are monitor hotplug
> events captured?

You get a "change"-uevent on the card-node. Use libudev with
udev_monitor to listen for them. Hotplug-events will have HOTPLUG=1 as
uevent-variable.

Thanks
David

DRM Hotplug

[Rian Quinn]

I noticed that the hotplug IOTCLs were removed. How are monitor hotplug events 
captured?


Thanks,
- Rian


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[Bug 49943] radeon/drm: Hotplug udev events stop working

[bugzilla-dae...@freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=49943

--- Comment #10 from Harald Judt  ---
I didn't disable polling. However, if the patches haven't been merged upstream
yet, then it's clear that it will not work. Thanks for clarification.

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[Bug 49943] radeon/drm: Hotplug udev events stop working

[bugzilla-dae...@freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=49943

--- Comment #9 from Alex Deucher  ---
(In reply to comment #8)
> Reproducible with linux-3.6.0-rc6. If it is a duplicate of bug 51042,
> shouldn't this be fixed now, or have the patches referenced in that bug not
> been committed yet
> (http://comments.gmane.org/gmane.comp.freedesktop.xorg.drivers.ati/22107, or
> more specific the patches by Daniel Vetter:
> http://lists.freedesktop.org/archives/dri-devel/2012-May/023407.html)?

If you disable polling, it also disables hotplug propagation since they share
the same infrastructure in the common drm code.  Daniel's patches have not been
merged upstream yet.

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[Bug 49943] radeon/drm: Hotplug udev events stop working

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https://bugs.freedesktop.org/show_bug.cgi?id=49943

--- Comment #10 from Harald Judt h.j...@gmx.at ---
I didn't disable polling. However, if the patches haven't been merged upstream
yet, then it's clear that it will not work. Thanks for clarification.

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[Bug 49943] radeon/drm: Hotplug udev events stop working

[bugzilla-dae...@freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=49943

--- Comment #8 from Harald Judt  2012-09-21 16:05:14 UTC ---
Reproducible with linux-3.6.0-rc6. If it is a duplicate of bug 51042, shouldn't
this be fixed now, or have the patches referenced in that bug not been
committed yet
(http://comments.gmane.org/gmane.comp.freedesktop.xorg.drivers.ati/22107, or
more specific the patches by Daniel Vetter:
http://lists.freedesktop.org/archives/dri-devel/2012-May/023407.html)?

I still get only two events when monitoring with udevadm:

monitor will print the received events for:
UDEV - the event which udev sends out after rule processing
KERNEL - the kernel uevent

KERNEL[601.731162] change  
/devices/pci:00/:00:01.0/:01:00.0/drm/card0 (drm)
ACTION=change
DEVNAME=/dev/dri/card0
DEVPATH=/devices/pci:00/:00:01.0/:01:00.0/drm/card0
DEVTYPE=drm_minor
HOTPLUG=1
MAJOR=226
MINOR=0
SEQNUM=1407
SUBSYSTEM=drm

UDEV  [601.731859] change  
/devices/pci:00/:00:01.0/:01:00.0/drm/card0 (drm)
ACTION=change
DEVNAME=/dev/dri/card0
DEVPATH=/devices/pci:00/:00:01.0/:01:00.0/drm/card0
DEVTYPE=drm_minor
HOTPLUG=1
MAJOR=226
MINOR=0
SEQNUM=1407
SUBSYSTEM=drm

After that, no more events on plug/unplug.

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[Bug 49943] radeon/drm: Hotplug udev events stop working

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https://bugs.freedesktop.org/show_bug.cgi?id=49943

--- Comment #8 from Harald Judt h.j...@gmx.at 2012-09-21 16:05:14 UTC ---
Reproducible with linux-3.6.0-rc6. If it is a duplicate of bug 51042, shouldn't
this be fixed now, or have the patches referenced in that bug not been
committed yet
(http://comments.gmane.org/gmane.comp.freedesktop.xorg.drivers.ati/22107, or
more specific the patches by Daniel Vetter:
http://lists.freedesktop.org/archives/dri-devel/2012-May/023407.html)?

I still get only two events when monitoring with udevadm:

monitor will print the received events for:
UDEV - the event which udev sends out after rule processing
KERNEL - the kernel uevent

KERNEL[601.731162] change  
/devices/pci:00/:00:01.0/:01:00.0/drm/card0 (drm)
ACTION=change
DEVNAME=/dev/dri/card0
DEVPATH=/devices/pci:00/:00:01.0/:01:00.0/drm/card0
DEVTYPE=drm_minor
HOTPLUG=1
MAJOR=226
MINOR=0
SEQNUM=1407
SUBSYSTEM=drm

UDEV  [601.731859] change  
/devices/pci:00/:00:01.0/:01:00.0/drm/card0 (drm)
ACTION=change
DEVNAME=/dev/dri/card0
DEVPATH=/devices/pci:00/:00:01.0/:01:00.0/drm/card0
DEVTYPE=drm_minor
HOTPLUG=1
MAJOR=226
MINOR=0
SEQNUM=1407
SUBSYSTEM=drm

After that, no more events on plug/unplug.

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[Bug 49943] radeon/drm: Hotplug udev events stop working

[bugzilla-dae...@freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=49943

--- Comment #6 from Harald Judt  2012-06-14 16:09:16 PDT ---
Yes, the computer prints these everytime I plug or unplug the HDMI monitor:

[drm:evergreen_irq_process], IH: HPD6

There are exactly 6 such messages to be found in dmesg, that would exactly
correspond to connecting and disconnecting the monitor 3 times.

More data, perhaps useful:

[drm] Connector 2:
[drm]   HDMI-A
[drm]   HPD6
[drm]   DDC: 0x6460 0x6460 0x6464 0x6464 0x6468 0x6468 0x646c 0x646c
[drm]   Encoders:
[drm] DFP3: INTERNAL_UNIPHY1

[drm:evergreen_irq_set], evergreen_irq_set: sw int cp1
[drm:evergreen_irq_set], evergreen_irq_set: sw int cp2
[drm:evergreen_irq_set], evergreen_irq_set: vblank 2
[drm:evergreen_irq_set], evergreen_irq_set: vblank 3
[drm:evergreen_irq_set], evergreen_irq_set: vblank 4
[drm:evergreen_irq_set], evergreen_irq_set: vblank 5
[drm:evergreen_irq_set], evergreen_irq_set: hpd 1
[drm:evergreen_irq_set], evergreen_irq_set: hpd 3
[drm:evergreen_irq_set], evergreen_irq_set: hpd 4
[drm:evergreen_irq_set], evergreen_irq_set: hpd 5
[drm:evergreen_irq_set], evergreen_irq_set: hpd 6
[drm:drm_calc_vbltimestamp_from_scanoutpos], crtc 1 : v 5 p(2174,501)@
1339714655.238103 -> 1339714655.230668 [e 1 us, 0 rep]
[drm:evergreen_irq_process], r600_irq_process start: rptr 19552, wptr 19568
[drm:evergreen_irq_process], IH: HPD6
[drm:evergreen_irq_process], r600_irq_process start: rptr 19568, wptr 19584
[drm:evergreen_irq_process], IH: HPD6
[drm:evergreen_irq_process], r600_irq_process start: rptr 19584, wptr 19600
[drm:evergreen_irq_process], IH: HPD6
[drm:evergreen_irq_process], r600_irq_process start: rptr 19600, wptr 19616
[drm:evergreen_irq_process], IH: HPD6
[drm:evergreen_irq_process], r600_irq_process start: rptr 19616, wptr 19632
[drm:evergreen_irq_process], IH: HPD6

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[Bug 49943] radeon/drm: Hotplug udev events stop working

[bugzilla-dae...@freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=49943

--- Comment #5 from Alex Deucher  2012-06-14 15:20:27 PDT 
---
Can you see if the hw is still generating interrupts?  Enable drm debugging
(boot with drm.debug=1 on the kernel command line in grub or as root:
echo 1 > /sys/module/drm/parameters/debug
Then plug and unplug your monitor and check your dmesg output.  You should see
HPD messages each time you plug or unplug.  I'd suggest doing this without X
running otherwise there will be too much other stuff in your dmesg output.

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[Bug 49943] radeon/drm: Hotplug udev events stop working

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https://bugs.freedesktop.org/show_bug.cgi?id=49943

--- Comment #4 from Harald Judt  2012-06-14 15:14:51 PDT ---
Ok, tried again with 3.4.0 final.

First, no HDMI monitor connected:

Evergreen HDMI regs:
0x601c  0x (0)
0x6028  0x050ff012 (84930578)
0x6034  0x0012 (18)
0x6040  0x (0)
0x604c  0x (0)
0x6058  0x (0)

Connecting HDMI monitor:

udevadm monitor --property
monitor will print the received events for:
UDEV - the event which udev sends out after rule processing
KERNEL - the kernel uevent

KERNEL[115260.630569] change  
/devices/pci:00/:00:01.0/:01:00.0/drm/card0 (drm)
ACTION=change
DEVNAME=/dev/dri/card0
DEVPATH=/devices/pci:00/:00:01.0/:01:00.0/drm/card0
DEVTYPE=drm_minor
HOTPLUG=1
MAJOR=226
MINOR=0
SEQNUM=1815
SUBSYSTEM=drm

UDEV  [115260.638205] change  
/devices/pci:00/:00:01.0/:01:00.0/drm/card0 (drm)
ACTION=change
DEVNAME=/dev/dri/card0
DEVPATH=/devices/pci:00/:00:01.0/:01:00.0/drm/card0
DEVTYPE=drm_minor
HOTPLUG=1
MAJOR=226
MINOR=0
SEQNUM=1815
SUBSYSTEM=drm
USEC_INITIALIZED=115260630528

Evergreen HDMI regs:
0x601c  0x (0)
0x6028  0x050ff012 (84930578)
0x6034  0x0012 (18)
0x6040  0x (0)
0x604c  0x (0)
0x6058  0xff12 (-16777198)

Disconnecting HDMI monitor:

<< No events reported by udevadm >>

Evergreen HDMI regs:
0x601c  0x (0)
0x6028  0x050ff012 (84930578)
0x6034  0x0012 (18)
0x6040  0x (0)
0x604c  0x (0)
0x6058  0xff0ff000 (-15732736)

Nothing improved, event notification still doesn't work :-(

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[Bug 49943] radeon/drm: Hotplug udev events stop working

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https://bugs.freedesktop.org/show_bug.cgi?id=49943

--- Comment #7 from Alex Deucher  2012-06-14 16:44:11 UTC 
---
ok, so the hw is working fine, the event is just not getting propagated to
userspace properly.  Might be a duplicate of bug 51042.

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[Bug 49943] radeon/drm: Hotplug udev events stop working

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https://bugs.freedesktop.org/show_bug.cgi?id=49943

--- Comment #4 from Harald Judt h.j...@gmx.at 2012-06-14 15:14:51 PDT ---
Ok, tried again with 3.4.0 final.

First, no HDMI monitor connected:

Evergreen HDMI regs:
0x601c  0x (0)
0x6028  0x050ff012 (84930578)
0x6034  0x0012 (18)
0x6040  0x (0)
0x604c  0x (0)
0x6058  0x (0)

Connecting HDMI monitor:

udevadm monitor --property
monitor will print the received events for:
UDEV - the event which udev sends out after rule processing
KERNEL - the kernel uevent

KERNEL[115260.630569] change  
/devices/pci:00/:00:01.0/:01:00.0/drm/card0 (drm)
ACTION=change
DEVNAME=/dev/dri/card0
DEVPATH=/devices/pci:00/:00:01.0/:01:00.0/drm/card0
DEVTYPE=drm_minor
HOTPLUG=1
MAJOR=226
MINOR=0
SEQNUM=1815
SUBSYSTEM=drm

UDEV  [115260.638205] change  
/devices/pci:00/:00:01.0/:01:00.0/drm/card0 (drm)
ACTION=change
DEVNAME=/dev/dri/card0
DEVPATH=/devices/pci:00/:00:01.0/:01:00.0/drm/card0
DEVTYPE=drm_minor
HOTPLUG=1
MAJOR=226
MINOR=0
SEQNUM=1815
SUBSYSTEM=drm
USEC_INITIALIZED=115260630528

Evergreen HDMI regs:
0x601c  0x (0)
0x6028  0x050ff012 (84930578)
0x6034  0x0012 (18)
0x6040  0x (0)
0x604c  0x (0)
0x6058  0xff12 (-16777198)

Disconnecting HDMI monitor:

 No events reported by udevadm 

Evergreen HDMI regs:
0x601c  0x (0)
0x6028  0x050ff012 (84930578)
0x6034  0x0012 (18)
0x6040  0x (0)
0x604c  0x (0)
0x6058  0xff0ff000 (-15732736)

Nothing improved, event notification still doesn't work :-(

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[Bug 49943] radeon/drm: Hotplug udev events stop working

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=49943

--- Comment #5 from Alex Deucher ag...@yahoo.com 2012-06-14 15:20:27 PDT ---
Can you see if the hw is still generating interrupts?  Enable drm debugging
(boot with drm.debug=1 on the kernel command line in grub or as root:
echo 1  /sys/module/drm/parameters/debug
Then plug and unplug your monitor and check your dmesg output.  You should see
HPD messages each time you plug or unplug.  I'd suggest doing this without X
running otherwise there will be too much other stuff in your dmesg output.

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[Bug 49943] radeon/drm: Hotplug udev events stop working

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=49943

--- Comment #6 from Harald Judt h.j...@gmx.at 2012-06-14 16:09:16 PDT ---
Yes, the computer prints these everytime I plug or unplug the HDMI monitor:

[drm:evergreen_irq_process], IH: HPD6

There are exactly 6 such messages to be found in dmesg, that would exactly
correspond to connecting and disconnecting the monitor 3 times.

More data, perhaps useful:

[drm] Connector 2:
[drm]   HDMI-A
[drm]   HPD6
[drm]   DDC: 0x6460 0x6460 0x6464 0x6464 0x6468 0x6468 0x646c 0x646c
[drm]   Encoders:
[drm] DFP3: INTERNAL_UNIPHY1

[drm:evergreen_irq_set], evergreen_irq_set: sw int cp1
[drm:evergreen_irq_set], evergreen_irq_set: sw int cp2
[drm:evergreen_irq_set], evergreen_irq_set: vblank 2
[drm:evergreen_irq_set], evergreen_irq_set: vblank 3
[drm:evergreen_irq_set], evergreen_irq_set: vblank 4
[drm:evergreen_irq_set], evergreen_irq_set: vblank 5
[drm:evergreen_irq_set], evergreen_irq_set: hpd 1
[drm:evergreen_irq_set], evergreen_irq_set: hpd 3
[drm:evergreen_irq_set], evergreen_irq_set: hpd 4
[drm:evergreen_irq_set], evergreen_irq_set: hpd 5
[drm:evergreen_irq_set], evergreen_irq_set: hpd 6
[drm:drm_calc_vbltimestamp_from_scanoutpos], crtc 1 : v 5 p(2174,501)@
1339714655.238103 - 1339714655.230668 [e 1 us, 0 rep]
[drm:evergreen_irq_process], r600_irq_process start: rptr 19552, wptr 19568
[drm:evergreen_irq_process], IH: HPD6
[drm:evergreen_irq_process], r600_irq_process start: rptr 19568, wptr 19584
[drm:evergreen_irq_process], IH: HPD6
[drm:evergreen_irq_process], r600_irq_process start: rptr 19584, wptr 19600
[drm:evergreen_irq_process], IH: HPD6
[drm:evergreen_irq_process], r600_irq_process start: rptr 19600, wptr 19616
[drm:evergreen_irq_process], IH: HPD6
[drm:evergreen_irq_process], r600_irq_process start: rptr 19616, wptr 19632
[drm:evergreen_irq_process], IH: HPD6

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[Bug 49943] radeon/drm: Hotplug udev events stop working

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=49943

--- Comment #7 from Alex Deucher ag...@yahoo.com 2012-06-14 16:44:11 UTC ---
ok, so the hw is working fine, the event is just not getting propagated to
userspace properly.  Might be a duplicate of bug 51042.

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[Bug 49943] radeon/drm: Hotplug udev events stop working

[bugzilla-dae...@freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=49943

--- Comment #3 from Harald Judt  2012-05-20 05:05:10 PDT ---
Changing the register value using radeonreg also doesn't work:

radeonreg regset 0x6058 0x
OLD: 0x6058 (6058)  0xff0ff000 (-15732736)
NEW: 0x6058 (6058)  0xff0ff000 (-15732736)

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[Bug 49943] radeon/drm: Hotplug udev events stop working

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--- Comment #3 from Harald Judt h.j...@gmx.at 2012-05-20 05:05:10 PDT ---
Changing the register value using radeonreg also doesn't work:

radeonreg regset 0x6058 0x
OLD: 0x6058 (6058)  0xff0ff000 (-15732736)
NEW: 0x6058 (6058)  0xff0ff000 (-15732736)

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[Bug 49943] radeon/drm: Hotplug udev events stop working

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https://bugs.freedesktop.org/show_bug.cgi?id=49943

--- Comment #2 from Harald Judt  2012-05-18 06:45:13 PDT ---
BTW: Connecting HDMI again shows the following values:
HDMI connected:
0x601c  0x (0)
0x6028  0x0612 (100663314)
0x6034  0x0012 (18)
0x6040  0x (0)
0x604c  0x (0)
0x6058  0xff0ff012 (-15732718)

HDMI disconnected:
0x601c  0x (0)
0x6028  0x0612 (100663314)
0x6034  0x0012 (18)
0x6040  0x (0)
0x604c  0x (0)
0x6058  0xff0ff000 (-15732736)

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[Bug 49943] radeon/drm: Hotplug udev events stop working

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--- Comment #1 from Harald Judt  2012-05-18 06:35:44 PDT ---
Ok, I've run radeonreg, here is the output:

Before HDMI connected:
0x601c  0x (0)
0x6028  0x0612 (100663314)
0x6034  0x0012 (18)
0x6040  0x (0)
0x604c  0x (0)
0x6058  0x (0)

HDMI connected:
0x601c  0x (0)
0x6028  0x0612 (100663314)
0x6034  0x0012 (18)
0x6040  0x (0)
0x604c  0x (0)
0x6058  0xff12 (-16777198)

HDMI disconnected:
0x601c  0x (0)
0x6028  0x0612 (100663314)
0x6034  0x0012 (18)
0x6040  0x (0)
0x604c  0x (0)
0x6058  0xff0ff000 (-15732736)

The value of reg 0x6058 changes (HDMI-0). As you can see, after HDMI has been
disconnected, it is different from the original value (0). I suspect that there
is some problem with this?

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[Bug 49943] radeon/drm: Hotplug udev events stop working

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--- Comment #1 from Harald Judt h.j...@gmx.at 2012-05-18 06:35:44 PDT ---
Ok, I've run radeonreg, here is the output:

Before HDMI connected:
0x601c  0x (0)
0x6028  0x0612 (100663314)
0x6034  0x0012 (18)
0x6040  0x (0)
0x604c  0x (0)
0x6058  0x (0)

HDMI connected:
0x601c  0x (0)
0x6028  0x0612 (100663314)
0x6034  0x0012 (18)
0x6040  0x (0)
0x604c  0x (0)
0x6058  0xff12 (-16777198)

HDMI disconnected:
0x601c  0x (0)
0x6028  0x0612 (100663314)
0x6034  0x0012 (18)
0x6040  0x (0)
0x604c  0x (0)
0x6058  0xff0ff000 (-15732736)

The value of reg 0x6058 changes (HDMI-0). As you can see, after HDMI has been
disconnected, it is different from the original value (0). I suspect that there
is some problem with this?

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[Bug 49943] radeon/drm: Hotplug udev events stop working

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=49943

--- Comment #2 from Harald Judt h.j...@gmx.at 2012-05-18 06:45:13 PDT ---
BTW: Connecting HDMI again shows the following values:
HDMI connected:
0x601c  0x (0)
0x6028  0x0612 (100663314)
0x6034  0x0012 (18)
0x6040  0x (0)
0x604c  0x (0)
0x6058  0xff0ff012 (-15732718)

HDMI disconnected:
0x601c  0x (0)
0x6028  0x0612 (100663314)
0x6034  0x0012 (18)
0x6040  0x (0)
0x604c  0x (0)
0x6058  0xff0ff000 (-15732736)

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[Bug 49943] New: radeon/drm: Hotplug udev events stop working

[bugzilla-dae...@freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=49943

 Bug #: 49943
   Summary: radeon/drm: Hotplug udev events stop working
Classification: Unclassified
   Product: DRI
   Version: XOrg CVS
  Platform: All
OS/Version: Linux (All)
Status: NEW
  Severity: normal
  Priority: medium
 Component: DRM/Radeon
AssignedTo: dri-devel at lists.freedesktop.org
ReportedBy: h.judt at gmx.at


Making use of udev events, I'd like to launch a script when a monitor gets
connected or disconnected. However, an event is only fired once and then never
again.

Kernel: linux-3.4.0-rc7

lspci:
01:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI Cayman
PRO [Radeon HD 6950] (prog-if 00 [VGA controller])
Subsystem: Advanced Micro Devices [AMD] nee ATI Device 0b00
Flags: bus master, fast devsel, latency 0, IRQ 54
Memory at c000 (64-bit, prefetchable) [size=256M]
Memory at fe62 (64-bit, non-prefetchable) [size=128K]
I/O ports at e000 [size=256]
Expansion ROM at fe60 [disabled] [size=128K]
Capabilities: [50] Power Management version 3
Capabilities: [58] Express Legacy Endpoint, MSI 00
Capabilities: [a0] MSI: Enable+ Count=1/1 Maskable- 64bit+
Capabilities: [100] Vendor Specific Information: ID=0001 Rev=1 Len=010

Capabilities: [150] Advanced Error Reporting
Kernel driver in use: radeon

xrandr --verbose:
HDMI-0 connected (normal left inverted right x axis y axis)
Identifier: 0x58
Timestamp:  21810
Subpixel:   horizontal rgb
Clones:
CRTCs:  0 1 2 3 4 5
Transform:  1.00 0.00 0.00
0.00 1.00 0.00
0.00 0.00 1.00
   filter: 
EDID:
00002203010be903
00110103804627780b1990a755469824
10494b3fcf00818081cf81c061c04bc0
4bcf453c61cf011d007251d01e206e28
5500c48e211e011d8018711c1620
582c2500c48e219e00fc004d
737461722044656d6f0a202000fd
0016500e5b1a202020202020014b
02031df24a0102038405101293141f23
090707830165030c0010008c0ad0
8a20e02d10103e9600138e211801
1d00bc52d01e20b8285540c48e21
1e011d80d0721c1620102c2580c48e21
9e8c0ad08a20e02d10103e9600c4
8e21188c0ad090204031200c4055
00c48e21182b
underscan vborder: 0 (0x)   range:  (0,128)
underscan hborder: 0 (0x)   range:  (0,128)
underscan:  off
supported: off  on   auto
coherent: 1 (0x0001)range:  (0,1)
- [modes cut off here] -

ls -la /sys/class/drm/card0-HDMI-A-1/
insgesamt 0
drwxr-xr-x 3 root root0 15. Mai 2012  .
drwxr-xr-x 8 root root0 15. Mai 2012  ..
lrwxrwxrwx 1 root root0 15. Mai 10:12 device -> ../../card0
-r--r--r-- 1 root root 4096 15. Mai 10:12 dpms
-r--r--r-- 1 root root0 15. Mai 10:12 edid
-r--r--r-- 1 root root 4096 15. Mai 10:12 enabled
-r--r--r-- 1 root root 4096 15. Mai 10:12 modes
drwxr-xr-x 2 root root0 15. Mai 10:12 power
-r--r--r-- 1 root root 4096 15. Mai 09:14 status
lrwxrwxrwx 1 root root0 15. Mai 2012  subsystem ->
../../../../../../../class/drm
-rw-r--r-- 1 root root 4096 15. Mai 2012  uevent

Note the modification date of status and the other files. That of status did
not change at all since boot, and the mdates of the others did change once
apparently.

I can poll "status" and see the changes when executing xrandr, but there will
be no more events, and the modification dates do not change anymore.

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[Bug 49943] New: radeon/drm: Hotplug udev events stop working

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=49943

 Bug #: 49943
   Summary: radeon/drm: Hotplug udev events stop working
Classification: Unclassified
   Product: DRI
   Version: XOrg CVS
  Platform: All
OS/Version: Linux (All)
Status: NEW
  Severity: normal
  Priority: medium
 Component: DRM/Radeon
AssignedTo: dri-devel@lists.freedesktop.org
ReportedBy: h.j...@gmx.at


Making use of udev events, I'd like to launch a script when a monitor gets
connected or disconnected. However, an event is only fired once and then never
again.

Kernel: linux-3.4.0-rc7

lspci:
01:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI Cayman
PRO [Radeon HD 6950] (prog-if 00 [VGA controller])
Subsystem: Advanced Micro Devices [AMD] nee ATI Device 0b00
Flags: bus master, fast devsel, latency 0, IRQ 54
Memory at c000 (64-bit, prefetchable) [size=256M]
Memory at fe62 (64-bit, non-prefetchable) [size=128K]
I/O ports at e000 [size=256]
Expansion ROM at fe60 [disabled] [size=128K]
Capabilities: [50] Power Management version 3
Capabilities: [58] Express Legacy Endpoint, MSI 00
Capabilities: [a0] MSI: Enable+ Count=1/1 Maskable- 64bit+
Capabilities: [100] Vendor Specific Information: ID=0001 Rev=1 Len=010
?
Capabilities: [150] Advanced Error Reporting
Kernel driver in use: radeon

xrandr --verbose:
HDMI-0 connected (normal left inverted right x axis y axis)
Identifier: 0x58
Timestamp:  21810
Subpixel:   horizontal rgb
Clones:
CRTCs:  0 1 2 3 4 5
Transform:  1.00 0.00 0.00
0.00 1.00 0.00
0.00 0.00 1.00
   filter: 
EDID:
00002203010be903
00110103804627780b1990a755469824
10494b3fcf00818081cf81c061c04bc0
4bcf453c61cf011d007251d01e206e28
5500c48e211e011d8018711c1620
582c2500c48e219e00fc004d
737461722044656d6f0a202000fd
0016500e5b1a202020202020014b
02031df24a0102038405101293141f23
090707830165030c0010008c0ad0
8a20e02d10103e9600138e211801
1d00bc52d01e20b8285540c48e21
1e011d80d0721c1620102c2580c48e21
9e8c0ad08a20e02d10103e9600c4
8e21188c0ad090204031200c4055
00c48e21182b
underscan vborder: 0 (0x)   range:  (0,128)
underscan hborder: 0 (0x)   range:  (0,128)
underscan:  off
supported: off  on   auto
coherent: 1 (0x0001)range:  (0,1)
- [modes cut off here] -

ls -la /sys/class/drm/card0-HDMI-A-1/
insgesamt 0
drwxr-xr-x 3 root root0 15. Mai 2012  .
drwxr-xr-x 8 root root0 15. Mai 2012  ..
lrwxrwxrwx 1 root root0 15. Mai 10:12 device - ../../card0
-r--r--r-- 1 root root 4096 15. Mai 10:12 dpms
-r--r--r-- 1 root root0 15. Mai 10:12 edid
-r--r--r-- 1 root root 4096 15. Mai 10:12 enabled
-r--r--r-- 1 root root 4096 15. Mai 10:12 modes
drwxr-xr-x 2 root root0 15. Mai 10:12 power
-r--r--r-- 1 root root 4096 15. Mai 09:14 status
lrwxrwxrwx 1 root root0 15. Mai 2012  subsystem -
../../../../../../../class/drm
-rw-r--r-- 1 root root 4096 15. Mai 2012  uevent

Note the modification date of status and the other files. That of status did
not change at all since boot, and the mdates of the others did change once
apparently.

I can poll status and see the changes when executing xrandr, but there will
be no more events, and the modification dates do not change anymore.

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initial displaylink kms driver + drm hotplug

[Dave Airlie]

This series contains some changes to the drm to allow for better hotplug
support for usb devices, along with the initial displaylink KMS driver.

This relies on an fbdev patch that is in fbdev-next from Kay Sievers.
(remove sysfs framebuffer device with USB .disconnect)

The initial changes just allow us to disconnect userspace/sysfs stuff properly
then on close of the device we clean up things properly.

This and some other patches it relies on are in my pfdo git tree udl-unplug 
branch.

Dave.

initial displaylink kms driver + drm hotplug

[Dave Airlie]

This series contains some changes to the drm to allow for better hotplug
support for usb devices, along with the initial displaylink KMS driver.

This relies on an fbdev patch that is in fbdev-next from Kay Sievers.
(remove sysfs framebuffer device with USB .disconnect)

The initial changes just allow us to disconnect userspace/sysfs stuff properly
then on close of the device we clean up things properly.

This and some other patches it relies on are in my pfdo git tree udl-unplug 
branch.

Dave.

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