Michael Paddon, this bug was reported a while ago and there hasn't been
any activity in it recently. We were wondering if this is still an
issue? If so, could you please test for this with the latest development
release of Ubuntu? ISO images are available from
http://cdimage.ubuntu.com/daily-live/current/ .
If it remains an issue, could you please run the following command in
the development release from a Terminal
(Applications->Accessories->Terminal), as it will automatically gather
and attach updated debug information to this report:
apport-collect -p linux <replace-with-bug-number>
** Tags added: needs-upstream-testing
** Tags added: needs-kernel-logs
** Changed in: linux (Ubuntu)
Status: Confirmed => Incomplete
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https://bugs.launchpad.net/bugs/1165965
Title:
External display stopped working on MacBook Air
Status in “linux” package in Ubuntu:
Incomplete
Bug description:
After upgrading to 13.04 beta, my external monitor is no longer
detected/driven. This works perfectly under 12.10, and is therefore a
major regression impacting common use cases.
When the Display Port/VGA adapter is plugged in dmesg reports 15 instances of:
[drm:intel_dp_i2c_aux_ch] *ERROR* too many retries, giving up
Hardware: MacBook Air 2012
Display configuration: Apple Display Port to VGA adaptor
Ubuntu version: 13.04 beta.
---
ApportVersion: 2.9.2-0ubuntu5
Architecture: amd64
DistroRelease: Ubuntu 13.04
EcryptfsInUse: Yes
InstallationDate: Installed on 2012-07-24 (258 days ago)
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64
(20120425)
MarkForUpload: True
Package: linux (not installed)
Tags: raring
Uname: Linux 3.9.0-030900rc6-generic x86_64
UnreportableReason: The running kernel is not an Ubuntu kernel
UpgradeStatus: Upgraded to raring on 2013-04-07 (2 days ago)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
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