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Acer AL2216W Monitor: can't get optimum resolution [solved]

#1 User is offline   Sunwatcher 

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Posted 04 February 2008 - 02:05 PM

Hello all.

I just upgraded my monitor, but I can't get the optimum resolution (1680x1050). I have an NVIDIA GeForce 7100GS card. I have checked several things:
1. Hardware detection shows GeForce 7100GS present;
2. I went to the x system configuration in MCC, but it shows my video card as a GeForce FX - GeForce 8800, and the monitor as my old one (Acer AL1716);
3. Going to System>Administration>NVIDIA Display Settings, this shows my new monitor correctly (Acer AL2216W), it also shows my new video card.

I have tried setting the maximum resolution, which is available as a choice under the NVIDIA Display Settings, but I get a screen of rather colorful mush. It seems that I have conflicting settings, but I am not sure how to fix it. I am posting the contents of /etc/X11/xorg.conf -- which seems to show my old monitor and card. Any ideas?


Contents of xorg.conf:
-----------------------------------------------------------------------------------------------------------------------------------------
# File generated by XFdrake (rev 230776)

Section "Extensions"
Option "Composite"
EndSection
# **********************************************************************
# Refer to the xorg.conf man page for details about the format of
# this file.
# **********************************************************************

Section "ServerFlags"
#DontZap # disable <Ctrl><Alt><BS> (server abort)
AllowMouseOpenFail # allows the server to start up even if the mouse does not work
#DontZoom # disable <Ctrl><Alt><KP_+>/<KP_-> (resolution switching)
EndSection

Section "Module"
Load "dbe" # Double-Buffering Extension
Load "v4l" # Video for Linux
Load "extmod"
Load "type1"
Load "freetype"
Load "glx" # 3D layer
EndSection

Section "InputDevice"
Identifier "Keyboard1"
Driver "kbd"
Option "XkbModel" "pc105"
Option "XkbLayout" "us"
Option "XkbOptions" "compose:rwin"
EndSection

Section "InputDevice"
Identifier "Mouse1"
Driver "mouse"
Option "Protocol" "ExplorerPS/2"
Option "Device" "/dev/mouse"
EndSection

Section "Monitor"
Identifier "monitor1"
VendorName "Plug'n Play"
ModelName "AL1716"
HorizSync 31-81
VertRefresh 56-75

# TV fullscreen mode or DVD fullscreen output.
# 768x576 @ 79 Hz, 50 kHz hsync
ModeLine "768x576" 50.00 768 832 846 1000 576 590 595 630

# 768x576 @ 100 Hz, 61.6 kHz hsync
ModeLine "768x576" 63.07 768 800 960 1024 576 578 590 616
EndSection

Section "Device"
Identifier "device1"
VendorName "nVidia Corporation"
BoardName "NVIDIA GeForce FX - GeForce 8800"
Driver "nvidia"
Option "DPMS"
Option "RenderAccel" "false"
Option "AddARGBGLXVisuals"
EndSection

Section "Screen"
Identifier "screen1"
Device "device1"
Monitor "monitor1"
DefaultColorDepth 24

Subsection "Display"
Depth 8
Modes "1280x1024" "1152x864" "1024x768" "832x624" "800x600" "640x480" "480x360" "320x240"
EndSubsection

Subsection "Display"
Depth 15
Modes "1280x1024" "1152x864" "1024x768" "832x624" "800x600" "640x480" "480x360" "320x240"
EndSubsection

Subsection "Display"
Depth 16
Modes "1280x1024" "1152x864" "1024x768" "832x624" "800x600" "640x480" "480x360" "320x240"
EndSubsection

Subsection "Display"
Depth 24
Modes "1280x1024" "1152x864" "1024x768" "832x624" "800x600" "640x480" "480x360" "320x240"
EndSubsection
EndSection

Section "ServerLayout"
Identifier "layout1"
InputDevice "Keyboard1" "CoreKeyboard"
InputDevice "Mouse1" "CorePointer"
Screen "screen1"
EndSection
-----------------------------------------------------------------------------------------------------------------------------------------
0

#2 User is offline   tyme 

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Posted 04 February 2008 - 03:58 PM

It looks like your xorg.conf is still set up for the old monitor. I would suggested trying to run XFDrake again to try to reconfigure the monitor settings.

Is this monitor connected via DVI or VGA?

If re-running XFDrake doesn't work out well for you, try changing these lines in your xorg.conf:

Quote

HorizSync 31-81
VertRefresh 56-75
to:

Quote

HorizSync 31-84
VertRefresh 56-77
and for all the "Modes" lines add 1680x1050:

Quote

Modes "1680x1050" "1280x1024" "1152x864" "1024x768" "832x624" "800x600" "640x480" "480x360" "320x240"

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#3 User is offline   Sunwatcher 

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Posted 04 February 2008 - 09:49 PM

Thank you Tyme. I will try this as soon as I get back to my Linux box. The monitor is connected via DVI.

(I did 'mis-type' in my original post: My video card, the 7100GS, is the only card I have had in this newly built machine. Mandriva defaulted to the GeForce FX - GeForce 8800 on installation. I don't know if this is relevant, but the Mandriva hardware detection doesn't seem to see my video card correctly.)
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#4 User is offline   Ixthusdan 

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Posted 05 February 2008 - 01:20 AM

The Mandriva hardware detection becomes meaningless if and only if you are using the Nvidia proprietary drivers. When you re-run XFdrake, the driver will correct X. First, Mandriva will install its own driver (worthless) and then it will say a better driver is present, would you like to use it? Answer yes. In this case, runnig XFdrake allows the Nvidia driver to reset.
The people never give up their liberties but under some delusion. Edmund Burke, 1784
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#5 User is offline   Sunwatcher 

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Posted 05 February 2008 - 03:23 AM

Success! Thanks to Tyme's advice about editing xorg.conf. (I did try running XFdrake, but this did not work. Nothing seemed to reset.) All seems well now. Many thanks to you all.
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#6 User is offline   tyme 

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Posted 05 February 2008 - 01:26 PM

glad you got it working :thumbs:/>
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#7 User is offline   dbmacg 

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Posted 22 May 2008 - 12:40 PM

In 2008.1 the Acer AL2216w is unavailable.

I found that the following /etc/X11/x05g.conf Sections worked, with particular attention to the ModeLine
parameters.


Section "Monitor"
Identifier "monitor1"
VendorName "Acer"
ModelName "Acer AL2216W"
HorizSync 30-82
VertRefresh 56.0-76.0
Modeline "1680x1050" 149.00 1680 1760 1944 2280 1050 1050 1052 1089 +HSync -VSync

EndSection

Section "Device"
Identifier "device1"
VendorName "nVidia Corporation"
BoardName "NVIDIA GeForce FX to GeForce 8800"
Driver "nvidia"
Option "DPMS"
Option "DynamicTwinView" "false"
Option "AddARGBGLXVisuals"
EndSection

Section "Screen"
Identifier "screen1"
Device "device1"
Monitor "monitor1"
DefaultColorDepth 24

Subsection "Display"
Depth 8
Modes "1680x1050" "1600x1000" "1440x900" "1280x800"
EndSubsection

Subsection "Display"
Depth 15
Modes "1680x1050" "1600x1000" "1440x900" "1280x800"
EndSubsection

Subsection "Display"
Depth 16
Modes "1680x1050" "1600x1000" "1440x900" "1280x800"
EndSubsection

Subsection "Display"
Depth 24
Modes "1680x1050" "1600x1000" "1440x900" "1280x800"
EndSubsection
EndSection
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#8 User is offline   scarecrow 

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Posted 22 May 2008 - 04:09 PM

First, you should really comment in
Load "type1"
from your "Module" section. Currently xorg server is using freetype.

Second, under section "Device" you may add a couple of things:
Option "TripleBuffer" "True
Option "ConnectedMonitor" "DFP"


The first one is self-explanatory, while the second one will tell your videocard that you are using a DVI cable. Chances that you will get better display quality are good.

This post has been edited by scarecrow: 22 May 2008 - 04:13 PM

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