Bug 11677

Summary:	monitor resolution keeps changing
Product:	Mageia	Reporter:	Frank Griffin <ftg>
Component:	RPM Packages	Assignee:	Mageia Bug Squad <bugsquad>
Status:	RESOLVED FIXED	QA Contact:
Severity:	normal
Priority:	Normal
Version:	Cauldron
Target Milestone:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Source RPM:	x11	CVE:
Status comment:

Description Frank Griffin 2013-11-15 17:20:05 CET

About 6 months ago I replaced my monitor with a large 1920x1080 Samsung monitor. During boot, I get messages about no or an invalid EDID found, but the monitor appeared to work fine in spite of that. I set the display to 1920x1080 in both XFdrake and the KDE Display configurator.

Recently, I'm seeing the following odd behavior: Upon booting, the FrameBuffer splash resolution is correct. When KDM starts, the resolution *may* be 1920x1080, but far more often it is way less and the KDM widgets display in a larger than normal size. When I log into KDE, the KDE MGA splashscreen starts out at the KDM resolution, then flips to taking up the top left quarter of the screen, and then expands to the desktop with a 1920x1080 resolution that is "squeezed" horizontally to leave about an inch of black screen to the left and right of the desktop.

This happens with both my primary ID and a new user.

It gets better. If I log out of KDE, the KDM screen has magically gone back to the correct 1920x1080 resolution, and if I log into KDE again, the display looks normal, with a 1920x1080 desktop taking up the full screen.

I am using the nonfree fgrlx driver. I'll reiterate that this was not happening for the first several months I had this monitor on cauldron, and it looks like only KDE-related components are behaving badly here.

The behavior is somewhat random. Every once in a blue moon, I'll get the overly large KDM screen, but a normal KDE desktop. Sometimes I get a normal KDM screen, and the compressed KDE desktop. But mostly, it is as described above.

I've checked xorg.conf and the KDE Display configurator, and both consistently say 1920x1080.

Reproducible:

Steps to Reproduce:

Comment 1 Frank Griffin 2013-11-15 17:35:15 CET

I just tried testing with other desktops.  Logging out of the normal-sized KDE desktop gave me an oversized KDM, so it isn't consistent that logging out gets a normal KDM.

GNOME came up fine the first time.  LXDE came up oversized, but taking up the entire screen.  The LXDE Monitor tool said the resolution was set to 1024x768, so I changed and saved that, logged out, got a normal KDM, logged back in, and got a compressed 1920x1080 desktop.  So it's not just KDM/KDE.

I have no idea who's driving this bus.  I long for the days when you could set something in xorg.conf, and everything else abided by it.  Does anyone have an idea of what is messing this up ?

Source RPM: kde => x11

Comment 2 Frank Griffin 2013-12-05 16:29:19 CET

This was apparently a problem either with the kernel or the drivers, and has been corrected.  I built a fresh install, and now instead of 4 "more or an invalid EDID" messages and the error, I get one or two messages and the error does not occur.

I'm guessing that whatever reads the EDID was recovering badly from an initial error, and that this got corrected.

Status: NEW => RESOLVED
Resolution: (none) => FIXED