Bug 212687
Summary: | radeonfb module does not permit resolution change in FC6 | ||
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Product: | [Fedora] Fedora | Reporter: | Bill Moss <bmoss> |
Component: | kernel | Assignee: | Kernel Maintainer List <kernel-maint> |
Status: | CLOSED NOTABUG | QA Contact: | Brian Brock <bbrock> |
Severity: | medium | Docs Contact: | |
Priority: | medium | ||
Version: | 6 | CC: | mjs, wtogami |
Target Milestone: | --- | ||
Target Release: | --- | ||
Hardware: | i686 | ||
OS: | Linux | ||
Whiteboard: | |||
Fixed In Version: | Doc Type: | Bug Fix | |
Doc Text: | Story Points: | --- | |
Clone Of: | Environment: | ||
Last Closed: | 2006-11-02 23:25:09 UTC | Type: | --- |
Regression: | --- | Mount Type: | --- |
Documentation: | --- | CRM: | |
Verified Versions: | Category: | --- | |
oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
Cloudforms Team: | --- | Target Upstream Version: | |
Embargoed: |
Description
Bill Moss
2006-10-28 01:43:48 UTC
This issue has been resolved. For more details see http://www.ces.clemson.edu/linux/fc6_setup.shtml#radeon. The problem was solved by using Option "MergedFB" "off" in xorg.conf. A web search revealed that a number of users have upgraded Xorg recently and had this same experience. It is not tied to particular video hardware or driver. By default MergedFB is undefined. For whatever reason, this is sometimes misinterpreted. The Xorg.0.log gave a hint. Xorg was trying to configure a CRT monitor, even though no external monitor is connected, using bad values for refresh rates. This forced a fall back to low resolution. This is the same thing that happens when you plug your laptop into a projector and X doesn't know what resolution to use. The DDC protocol is suppose to let the projector tell the laptop what resolution to use but sometimes this does not work or needs a kick in the pants via an X restart. With MergedFB off, my T42 is works correctly when I plug it into an LCD projector. It defaults to clone mode and the laptop screen is closed on the projector screen. It is not clear to my why MergedFB off is not the default. |