[gm45] hotplug interrupt storm when lid is opened

[masavini]

dell latitude E5400, ubuntu 10.10
power-management is set up so "do nothing" is selected for "when laptop lid is closed" both on ac power and battery power
normally everything works fine, BUT...

while i open the lid, the screen goes blank for a while and the first action i perform is VERY slow. the screen is blinking for a while, a then it seems to re-adjust screen resolution (that was already fine). when the very first action is performed (usually just clicking on a window!) the system works fine.
this is a little bit annoying, buth nothing critical...

the real bug is that SOMETIMES (randomly, i guess), the first action after lid is open causes the system to be blocked for a few minutes... sometimes 10, sometimes more.
i can't do anything: the cursor disappears, i can't switch to another terminal. the screen is not blank, but everything is stuck.
if i log in with ssh, top shows Xorg consuming 80% of cpu. i can kill the session, but this causes all my opened files to be closed (unsaved!).

this is my ~/.config/monitors.xml :

<monitors version="1">
  <configuration>
      <clone>no</clone>
      <output name="VGA1">
      </output>
      <output name="LVDS1">
          <vendor>LPL</vendor>
          <product>0x0138</product>
          <serial>0x00000000</serial>
          <width>1440</width>
          <height>900</height>
          <rate>60</rate>
          <x>0</x>
          <y>0</y>
          <rotation>normal</rotation>
          <reflect_x>no</reflect_x>
          <reflect_y>no</reflect_y>
          <primary>no</primary>
      </output>
      <output name="HDMI1">
      </output>
      <output name="DP1">
      </output>
      <output name="HDMI2">
      </output>
      <output name="DP2">
      </output>
      <output name="DP3">
      </output>
      <output name="TV1">
      </output>
  </configuration>
</monitors>

Xorg.conf is not present

my massages log is full up of this:
...
Oct 8 17:18:18 bolide kernel: [33021.861053] Skipping EDID probe due to cached edid
Oct 8 17:18:21 bolide kernel: [33025.096060] Skipping EDID probe due to cached edid
Oct 8 17:19:36 bolide kernel: [33100.380185] Skipping EDID probe due to cached edid
Oct 8 17:19:37 bolide kernel: [33100.600176] Skipping EDID probe due to cached edid
Oct 8 17:19:38 bolide kernel: [33101.644079] Skipping EDID probe due to cached edid
Oct 8 17:19:39 bolide kernel: [33102.708088] Skipping EDID probe due to cached edid
Oct 8 17:19:39 bolide kernel: [33102.932317] Skipping EDID probe due to cached edid
Oct 8 17:19:39 bolide kernel: [33103.324430] Skipping EDID probe due to cached edid

and Xorg.0.log shows a lot of these messages:
[ 33021.861] (II) intel(0): EDID vendor "LPL", prod id 312
[ 33021.861] (II) intel(0): Printing DDC gathered Modelines:
[ 33021.861] (II) intel(0): Modeline "1440x900"x0.0 96.20 1440 1536 1632 1728 900 903 909 926 +hsync -vsync (55.7 kHz)
[ 33024.292] (II) PM Event received: Capability Changed
[ 33024.292] I830PMEvent: Capability change
[ 33025.096] (II) intel(0): EDID vendor "LPL", prod id 312
[ 33025.096] (II) intel(0): Printing DDC gathered Modelines:
[ 33025.096] (II) intel(0): Modeline "1440x900"x0.0 96.20 1440 1536 1632 1728 900 903 909 926 +hsync -vsync (55.7 kHz)
[ 33100.380] (II) intel(0): EDID vendor "LPL", prod id 312
[ 33100.380] (II) intel(0): Printing DDC gathered Modelines:
[ 33100.380] (II) intel(0): Modeline "1440x900"x0.0 96.20 1440 1536 1632 1728 900 903 909 926 +hsync -vsync (55.7 kHz)
[ 33100.600] (II) intel(0): EDID vendor "LPL", prod id 312
[ 33100.600] (II) intel(0): Printing DDC gathered Modelines:
[ 33100.600] (II) intel(0): Modeline "1440x900"x0.0 96.20 1440 1536 1632 1728 900 903 909 926 +hsync -vsync (55.7 kHz)
[ 33101.644] (II) intel(0): EDID vendor "LPL", prod id 312
[ 33101.644] (II) intel(0): Printing DDC gathered Modelines:
[ 33101.644] (II) intel(0): Modeline "1440x900"x0.0 96.20 1440 1536 1632 1728 900 903 909 926 +hsync -vsync (55.7 kHz)
[ 33102.680] (II) XKB: reuse xkmfile /var/lib/xkb/server-0399C7B84EE4F124BF5E6B86F442B8128F6A625B.xkm

any ideas?

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Ivo Danihelka (ivo-danihelka)]

I have Dell Latitude E5510 and Kubuntu 11.10.
The system responsiveness becomes very slow after opening the lid. The mouse cursor moves with ~1 second pauses.

The state is fixed, if switching to the console (Ctrl+Alt+F1) and back (Alt+F7).

Note that manual turning of the display off does not cause the problem:
    xset dpms force off