remount > resume boots me into 800x600

Asked by komputes on 2011-10-05

If I boot into recovery mode and select "remount" then "resume", I consistently boot into low resolution (800x600).

What is the difference between the way the xserver starts in a normal boot and when selecting "resume" from recovery mode?

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: friendly-recovery 0.2.18
ProcVersionSignature: Ubuntu 3.0.0-12.19-generic 3.0.4
Uname: Linux 3.0.0-12-generic i686
NonfreeKernelModules: wl
ApportVersion: 1.23-0ubuntu2
Architecture: i386
Date: Wed Oct 5 18:08:18 2011
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Alpha i386 (20110817)
PackageArchitecture: all
SourcePackage: friendly-recovery
UpgradeStatus: Upgraded to oneiric on 2011-10-04 (0 days ago)

Question information

Language:
English Edit question
Status:
Answered
For:
Ubuntu friendly-recovery Edit question
Assignee:
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Last query:
2011-10-05
Last reply:
2012-02-06

This question was originally filed as bug #868782.

komputes (komputes) said : #1
Jani Uusitalo (uusijani) said : #2

Hi komputes.

The difference between a normal boot and a recovery mode boot is (among other things) in the parameters that are passed on to the Linux kernel. A normal boot uses Kernel Based Mode-setting (KMS) whereas in recovery mode KMS is turned off by default to make sure it causes no problems in case recovery mode is needed.

From the Release Notes of Ubuntu 10.04:

"Ubuntu 10.04 LTS enables the new kernel-mode-setting (KMS) technology by default on most common video chipsets. While this is a major step forward for the graphics architecture in Ubuntu, in some rare cases KMS will prevent your video output from working correctly, or from working at all. If you need to disable KMS, you can do so by booting with the nomodeset option." https://wiki.ubuntu.com/LucidLynx/ReleaseNotes#Working_around_bugs_in_the_new_kernel_video_architecture

I believe the nomodeset parameter is behind the low graphics mode you're seeing in recovery mode and therefore intentional, as visually unappealing as it may be.

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