Ubuntu
xserver-xorg-video-intel package

  1. Bug #221119
  2. Comment #45

Comment 45 for bug 221119

Revision history for this message
Joey Stanford (joey) wrote : Re: [gutsy, hardy, intrepid] Blank screen and (EE) intel(0): overrun on pipe B! on i945GM using intel driver

I have this issue as well. I am not using compiz.

After the system boots the display is fine. I login and then go about my normal business successfully.

After a few minutes to hours, I start to see some occasional tearing. Shortly there after the display goes black. Killing and restarting gdm and the Xserver gets me nothing but black screen. The xorg log shows continually repeating

(EE) intel(0): underrun on pipe A!

It takes a reboot to get the display back.

I have this on an original rev of the System76 Darter:

00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile 945GM/GMS, 943/940GML Express Integrated Graphics Controller [8086:27a2] (rev 03)
 Subsystem: ASUSTeK Computer Inc. Device [1043:1252]

I'm currently experimenting with the following:

Section "Device"
 Identifier "Configured Video Device"
        Driver "intel"
        Option "ForceEnablePipeA" "true"
EndSection

This only happens when I have an external vga monitor attached. It does not happen when I only use the laptop lcd.

For the Canonical folks, this machine is https://landscape.canonical.com/account/stan4d.net/computer/1656/info