xrandr not happy about external monitor

Alex Deucher alexdeucher at gmail.com
Tue Jan 29 09:00:38 PST 2008


On Jan 29, 2008 11:43 AM, Michele Mattioni <mattions at gmail.com> wrote:
>
> On Jan 28, 2008 11:39 PM, Michele Mattioni <mattions at gmail.com> wrote:
> >
> > On Jan 28, 2008 10:20 PM, Alex Deucher <alexdeucher at gmail.com> wrote:
> > >
> > > On Jan 28, 2008 4:56 PM, Michele Mattioni <mattions at gmail.com> wrote:
> > > >
> > > > On Jan 28, 2008 9:29 PM, Alex Deucher <alexdeucher at gmail.com> wrote:
> > > > >
> > > > > On Jan 28, 2008 4:16 PM, Michele Mattioni <mattions at gmail.com> wrote:
> > > > > >
> > > > > > On Jan 28, 2008 2:31 PM, Alex Deucher <alexdeucher at gmail.com> wrote:
> > > > > > >
> > > > > > > On Jan 28, 2008 4:51 AM, Michele Mattioni <mattions at gmail.com> wrote:
> > > > > > > > On Jan 28, 2008 6:17 AM, Alex Deucher <alexdeucher at gmail.com> wrote:
> > > > > > > > >
> > > > > > > > > On Jan 27, 2008 8:08 PM, Michele Mattioni <mattions at gmail.com> wrote:
> > > > > > > > > > Hello list,
> > > > > > > > > >
> > > > > > > > > > I have a laptop with a Mobility 9000 radeon and an external monitor
> > > > > > > > > > form Acer 22inches.
> > > > > > > > > >
> > > > > > > > > > I'm using an ubuntu gutsy and the version of the xserver-xorg-video-ati is
> > > > > > > > > > 1:6.7.195-1ubuntu2
> > > > > > > > > >
> > > > > > > > > > xrandr detect correctly the monitor:
> > > > > > > > > >
> > > > > > > > > > [mattions at the-tux:~]$ xrandr -q
> > > > > > > > > > Screen 0: minimum 320 x 200, current 1680 x 1050, maximum 1680 x 1200
> > > > > > > > > > VGA-0 connected 1680x1050+0+0 (normal left inverted right) 474mm x 296mm
> > > > > > > > > >   1680x1050      60.0*+   60.0
> > > > > > > > > >   1600x1200      59.9
> > > > > > > > > >   1280x1024      75.0     59.9
> > > > > > > > > >   1440x900       75.0     59.9
> > > > > > > > > >   1280x960       59.9
> > > > > > > > > >   1280x720       59.9
> > > > > > > > > >   1024x768       75.1     70.1     60.0
> > > > > > > > > >   832x624        74.6     74.8
> > > > > > > > > >   800x600        72.2     75.0     60.3     56.2
> > > > > > > > > >   640x480        75.0     72.8     66.7     60.0
> > > > > > > > > >   720x400        70.1
> > > > > > > > > > LVDS connected 1400x1050+0+0 (normal left inverted right) 0mm x 0mm
> > > > > > > > > >   1400x1050      61.8*+
> > > > > > > > > >   1280x800       60.0
> > > > > > > > > >   1280x768       60.0
> > > > > > > > > >   1024x768       60.0
> > > > > > > > > >   800x600        60.3
> > > > > > > > > >   640x480        59.9
> > > > > > > > > > S-video disconnected (normal left inverted right)
> > > > > > > > > >
> > > > > > > > > > However I can't see any image on the screen.
> > > > > > > > > > The screen is somehow blue, and if I give the instruction like
> > > > > > > > > > [mattions at the-tux:~]$ xrandr --output VGA-0 --off
> > > > > > > > > >
> > > > > > > > > > the screen turns black.
> > > > > > > > > > So I guess it's responding.
> > > > > > > > > >
> > > > > > > > > > My Xorg log is here:
> > > > > > > > > > http://www.ebi.ac.uk/~mattioni/log/Xorg.0.log
> > > > > > > > > > Do you have any idea?
> > > > > > > > >
> > > > > > > > > This sounds like a sync polarity issue.  Do any other modes on your
> > > > > > > > > monitor work?  According to your log, you have two 1680x1050 modes
> > > > > > > > > with different polarities:
> > > > > > > > > >   1680x1050      60.0*+   60.0
> > > > > > > > > (II) RADEON(0): Modeline "1680x1050"x60.0  146.25  1680 1784 1960 2240
> > > > > > > > >  1050 1053 1059 1089 +hsync -vsync (65.3 kHz)
> > > > > > > > > (II) RADEON(0): Modeline "1680x1050"x60.0  146.25  1680 1784 1960 2240
> > > > > > > > >  1050 1053 1059 1089 -hsync +vsync (65.3 kHz)
> > > > > > > > > see if switching to the other one makes the monitor work (use xrandr
> > > > > > > > > --verbose to look up the mode ids).
> > > > > > > > >
> > > > > > > > > Alex
> > > > > > > > >
> > > > > > > >
> > > > > > > > Thanks Alex for the quick answer,
> > > > > > > > can you tell me how I can switch the polarities?
> > > > > > > >
> > > > > > >
> > > > > > > The following should work:
> > > > > > >
> > > > > > > xrandr --newmode "1680x1050_60.00"  146.25  1680 1784 1960 2240  1050
> > > > > > > 1053 1059 1089 -hsync +vsync
> > > > > > > xrandr --addmode VGA-0 "1680x1050_60.00"
> > > > > > > xrandr --output VGA-0 --mode "1680x1050_60.00"
> > > > > > >
> > > > > > > Alex
> > > > > > >
> > > > > >
> > > > > > I've tried, but it doesn't work. :(
> > > > > > his is the xrandr output:
> > > > > >
> > > > > > [mattions at the-tux:~]$ xrandr -q
> > > > > > Screen 0: minimum 320 x 200, current 1680 x 1050, maximum 1680 x 1200
> > > > > > VGA-0 connected 1680x1050+0+0 (normal left inverted right) 474mm x 296mm
> > > > > >    1680x1050      60.0 +   60.0*
> > > > > >    1600x1200      59.9
> > > > > >    1280x1024      75.0     59.9
> > > > > >    1440x900       75.0     59.9
> > > > > >    1280x960       59.9
> > > > > >    1280x720       59.9
> > > > > >    1024x768       75.1     70.1     60.0
> > > > > >    832x624        74.6     74.8
> > > > > >    800x600        72.2     75.0     60.3     56.2
> > > > > >    640x480        75.0     72.8     66.7     60.0
> > > > > >    720x400        70.1
> > > > > >    1680x1050_60.00   60.0
> > > > > > LVDS connected 1400x1050+0+0 (normal left inverted right) 0mm x 0mm
> > > > > >    1400x1050      61.8*+
> > > > > >    1280x800       60.0
> > > > > >    1280x768       60.0
> > > > > >    1024x768       60.0
> > > > > >    800x600        60.3
> > > > > >    640x480        59.9
> > > > > > S-video disconnected (normal left inverted right)
> > > > > >
> > > > >
> > > > > hmmm... maybe your panel only likes reduced blanking modes even though
> > > > > it doesn't specify any in it's edid.  try this:
> > > > > xrandr --newmode  "1680x1050R"  119.00  1680 1728 1760 1840  1050 1053
> > > > > 1059 1080 +hsync -vsync
> > > > > xrandr --addmode VGA-0 "1680x1050R"
> > > > > xrandr --output VGA-0 --mode "1680x1050R"
> > > > >
> > > > > does that work better?
> > > > >
> > > > > >
> > > > > >
> > > > > > I've spotted this on the Xorg.log
> > > > > > (WW) RADEON(0): DDC2/I2C is not properly initialized
> > > > > >
> > > > > > Can be the problem?
> > > > >
> > > > > no you can ignore that.
> > > > >
> > > > > >
> > > > > > The model of the screen is
> > > > > > Acer X221W 22inch widescreen.
> > > > > >
> > > > > > Any other idea?
> > > > >
> > > > > try the reduced blanking mode I suggested above.
> > > > >
> > > > > Alex
> > > > >
> > > >
> > > >
> > > > no, it doesn't work.
> > > >
> > > > New conf:
> > > >
> > > > [mattions at the-tux:~]$ xrandr -q
> > > > Screen 0: minimum 320 x 200, current 1680 x 1050, maximum 1680 x 1200
> > > > VGA-0 connected 1680x1050+0+0 (normal left inverted right) 474mm x 296mm
> > > >    1680x1050      60.0 +   60.0
> > > >    1600x1200      59.9
> > > >    1280x1024      75.0     59.9
> > > >    1440x900       75.0     59.9
> > > >    1280x960       59.9
> > > >    1280x720       59.9
> > > >    1024x768       75.1     70.1     60.0
> > > >    832x624        74.6     74.8
> > > >    800x600        72.2     75.0     60.3     56.2
> > > >    640x480        75.0     72.8     66.7     60.0
> > > >    720x400        70.1
> > > >    1680x1050_60.00   60.0
> > > >    1680x1050R     59.9*
> > > > LVDS connected 1400x1050+0+0 (normal left inverted right) 0mm x 0mm
> > > >    1400x1050      61.8*+
> > > >    1280x800       60.0
> > > >    1280x768       60.0
> > > >    1024x768       60.0
> > > >    800x600        60.3
> > > >    640x480        59.9
> > > > S-video disconnected (normal left inverted right)
> > > >
> > > >
> > > > It's always blu...  alight blue, but no image is shown.
> > > > My xorg.conf is attached...
> > >
> > > can you get a picture?  Do any of the other modes work (1440x900,
> > > 1280x720, 1024x768, etc.)?  does changing the LVDS mode have an
> > > affect?
> > > xrandr --output LVDS --mode 1024x768
> > > xrandr --output VGA-0 --mode 1024x768
> > > xrandr --output VGA-0 --auto
> > >
> > > Alex
> > >
> >
> > Hi Alex,
> >
> > So every mode tried on the laptop works. Switching on, off, and
> > several resolution.
> >
> > On the other monitor is possible to switch it off and change the resolution.
> > Everytime there is a message on the screen
> >
> > "Auto Config
> > Please wait"
> >
> > and the same blue remain.
> >
> > If you give
> > xrandr --output VGA-0 --off
> >
> > the screen become black and there is
> > "No signal"
> >
> > Tomorrow I will provide you a picture...
> >
> > Thanks,
> > Michele
> >
>
> I've tested the laptop with another screen and it didn't work.
>
> I'm wondering if my VGA port is broken.
> When I attach the laptop to a second screen the output of lspci doesn't change.

It shouldn't change.  lspci shows pci devices not monitors.  Some
video chips show up as two pci devices, but this is purely a hack for
running dualhead in windows 2000 and has nothing to do with monitors.

>
> Has it to change or not?
> I remember I've ran that laptop with an external beamer (long time
> ago) there was even compiz running there...
>

Does the external port work if you boot the laptop with the lid
closed?  The bios boot screen should show up on the VGA monitor.

> The laptop has a tv-out port.. Can be the source of the problem?
> I notice that we are not any more on the ML, is the right way to do
> it, or I should address all the list?

Whoops, we should include the list in case others run into the same
issue (adding it back now).  TV-out shouldn't be a problem.  does
xrandr show it as connected?  By default it's assumed to be
disconnected so it's not used.

Alex


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