ubuntu-x-swat team mailing list archive

[Tim Holy <625220@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

Binary package hint: xorg

I've been trying Maverick daily build from Aug 26, 2010, in both the
Ubuntu and Kubuntu variants. My laptop (a Thinkpad T60) has a 1400x1050
screen (4:3), and I've also been plugging in an external Monitor (Dell
S2409W) with 1920x1080 resolution (16:9). Here is a reasonably
comprehensive report on the display switching situation, which overall
is showing signs of considerable improvement but needs a bit more love
(see particularly points #5 and #6 below):

1. Booting with external monitor connected: works in both (this fixes
bug #570011 for me; I verified that the "drm" kernel module was loaded
and no errors appeared in the dmesg)

2. Booting with just the laptop, and then plugging in the monitor and
switching resolution: works in Kubuntu, not tested in Ubuntu, but I
presume this works fine.

3. Setting resolution after plugging in external monitor: works in both,
although only Kubuntu readily supports my preferred configuration
(cloning the display but using the native resolution on both screens; I
use this because at work I connect my laptop via a docking station on a
shelf above my desk). In Ubuntu, if I check "same image in all monitors"
then I have to use the same resolution in all monitors, which is the
lower 1024x768 or 1280xsomething (don't remember now). Kubuntu lets me
use 1920x1080 on the external monitor while using 1400x1050 on the
laptop, and making one a clone (incomplete, of course) of the other.

4. Auto-detection that a new monitor has been plugged in, and asking the
user if he/she wants to configure the display: works in Kubuntu, does
not work in Ubuntu (is it supposed to?)

5. Auto-detection that a monitor has been disconnected, and asking the
user if he/she wants to configure the display: does not work in either.
In Kubuntu there is the extra amusement that manually configuring
suddenly causes the automatic system to realize something has happened.
In other words, if I manually navigate to the systemsettings->Display
and Monitor, once I click the Display icon it (1) gives me the display
configuration window, and (2) also pops up the dialog that should have
popped up when I disconnected the monitor. If I say I want to configure
it, then I get a second window (essentially copies of each other) for
doing the configuration; if I click Ignore, then just one opens. (This
bug is also present in Lucid.)

6. Changing desktop size after a monitor disconnect: In Ubuntu, before I
run the configuration dialog, the desktop is the same as before I
disconnected the monitor (meaning that there is a whole virtual desktop
to which my mouse can move, windows are located, etc, but which I cannot
see). However, once I run the dialog it resizes the display AND the
desktop, providing me with the experience I expect when running with the
laptop alone. In Kubuntu, the situation is different: if I start out
running in the mode where each display is running at its maximum
resolution, the desktop is naturally the larger of the two. If I then
disconnect the monitor, and go to the configuration dialog, then here is
the problem: it knows the display is already 1400x1050, and so the Apply
button is grayed out. However, the desktop size is 1920x1080, and there
is no user-visible way to fix that. Configuring a lower-resolution
display does _not_ change the desktop size, there are still windows over
the edge and my mouse can navigate off-screen. (What I usually do is run
"xrandr --auto" from the command line.)

7. I have not yet had a chance to test whether bug #476357, triggered
when I switch back and forth between two different external monitors at
work and home, is finally fixed (it is still broken in Lucid). This bug
definitely counts as the most serious issue of all, because it requires
an X restart, which is sufficiently annoying that it discourages me from
switching between monitors. I will test when I get a chance.

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: xorg 1:7.5+6ubuntu3
ProcVersionSignature: Ubuntu 2.6.35-19.25-generic 2.6.35.3
Uname: Linux 2.6.35-19-generic i686
Architecture: i386
DRM.card0.LVDS.1:
 status: connected
 enabled: enabled
 dpms: On
 modes: 1400x1050 1400x1050 1280x1024 1280x1024 1280x960 1280x854 1280x800 1280x720 1152x768 1024x768 1024x768 800x600 800x600 848x480 720x480 640x480 640x480
 edid-base64: AP///////wAwriJAAAAAAAAPAQOAHBV46q9AlVZKjyUgUFQhCACBgAEBAQEBAQEBAQEBAQEBMCp4IFEaEEAwcBMAHdYQAAAZJSN4IFEaEEAwcBMAHdYQAAAZAAAADwCQQzKQQygPAQAJ5QAAAAAA/gBIVDE0UDEyLTEwMAogAD8=
DRM.card0.VGA.1:
 status: disconnected
 enabled: disabled
 dpms: Off
 modes: 
 edid-base64:
Date: Fri Aug 27 09:25:48 2010
GdmLog: Error: command ['kdesudo', '--', 'cat', '/var/log/gdm/:0.log'] failed with exit code 1: cat: /var/log/gdm/:0.log: No such file or directory
GdmLog1: Error: command ['kdesudo', '--', 'cat', '/var/log/gdm/:0.log.1'] failed with exit code 1: cat: /var/log/gdm/:0.log.1: No such file or directory
GdmLog2: Error: command ['kdesudo', '--', 'cat', '/var/log/gdm/:0.log.2'] failed with exit code 1: cat: /var/log/gdm/:0.log.2: No such file or directory
LiveMediaBuild: Kubuntu 10.10 "Maverick Meerkat" - Alpha i386 (20100826)
MachineType: LENOVO 2623D7U
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcCmdLine: file=/cdrom/preseed/khostname.seed boot=casper maybe-ubiquity initrd=/casper/initrd.lz quiet splash --
ProcEnviron:
 LANGUAGE=
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: xorg
dmi.bios.date: 04/18/2006
dmi.bios.vendor: LENOVO
dmi.bios.version: 79ET60WW (1.05a)
dmi.board.name: 2623D7U
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr79ET60WW(1.05a):bd04/18/2006:svnLENOVO:pn2623D7U:pvrThinkPadT60:rvnLENOVO:rn2623D7U:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 2623D7U
dmi.product.version: ThinkPad T60
dmi.sys.vendor: LENOVO
glxinfo: Error: [Errno 2] No such file or directory
peripherals: Error: [Errno 2] No such file or directory
system:
 distro:             Ubuntu
 codename:           maverick
 architecture:       i686
 kernel:             2.6.35-19-generic

** Affects: xorg (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug i386 maverick

-- 
Desktop size and monitor disconnect not handled gracefully
https://bugs.launchpad.net/bugs/625220
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