Public bug reported:
My external Citizen monitor is not configured automatically anymore,
when it did when Precise was beta and in prior stable releases.
Gnome Display pane lists the monitor as unknown, and lists the following
resolutions.
1024 x 768
800x600
The monitor works with the lower res setting for seconds at a time, like
a strobe light. The higher resolution makes the screen go black with the
odd white pixilated streak.
Popping over to tty1 shows the following errors flooding the screen in
non-stop intervals while creating synchronous lagging in responsiveness.
unknown citizen ramdom dvi detect error probed a monitor but no|invalid EDID
EDID checksum is invalid ,remainder is 146
Hardware
First generation (2006) Intel MacBook Pro (Intel Core Duo, aka Yonah based
processor) with an ATI Mbility Radeon X1600 video card.
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: libxrandr2 2:1.3.2-2
ProcVersionSignature: Ubuntu 3.2.0-27.43-generic 3.2.21
Uname: Linux 3.2.0-27-generic i686
ApportVersion: 2.0.1-0ubuntu11
Architecture: i386
Date: Wed Aug 1 01:33:48 2012
DistroCodename: precise
DistroVariant: ubuntu
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
SourcePackage: libxrandr
UpgradeStatus: Upgraded to precise on 2012-03-23 (130 days ago)
** Affects: libxrandr (Ubuntu)
Importance: Undecided
Status: New
** Tags: apport-bug i386 precise running-unity ubuntu
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https://bugs.launchpad.net/bugs/1031621
Title:
External Citizen monitor does not autoconfigure anymore
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