Support wide screen resolution on R52 thinkpad

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How can I set wide screen resolution for external monitor with my
thinkpad R52?
I'm running Win-XP SP2. My R52 is 1858-69G using Intel 915GM/GMS,
910GML chipset.
The presentation director sometimes (no always!) show the wide screen
resolution as an option but when selecting any wide screen resolution
I get message "the setting you have selected cannot be applied
properly". The tried all the possible combination, updated to the
latest version of bios, chipset drivers, presentation director
version, etc... Nothing works.
Anyone has any idea?


Re: Support wide screen resolution on R52 thinkpad wrote:
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Does the display device you are plugging in, support DDC serial
interface and provide EDID data ? You can check that, by using
this tool.

When the monitor is connected, that utility should be able
to display a page of info about the external display device.
It may list the max (native) resolution. (Mine lists 1280x1024.)
The video driver needs that, to validate the max resolution.
Without validation, the driver will limit resolution to a lesser
(safe) value.

My LCD monitor, also has a "monitor driver" available for
download. This is a 3KB .INF file, and it declares the
max monitor resolution. If the DDC method was busted for
whatever reason, installing the "monitor driver" will
keep the video driver for the laptop GPU, properly

Not all monitor makers provide a driver file, because they
insists all is "Plug and Play". Which is true if DDC is working,
but not true if it is broken for some reason.

The specs for 915GM, mention 16x9, so some modes other than
the old ones should be available.


Re: Support wide screen resolution on R52 thinkpad


Thanks for the answer and the elaborated info.
I followed your advice and ran the moninfo tool. This is my output:

  Windows description......... AOC 716Sw
  Manufacturer description.... 716Sw
  Manufacturer................ AOC
  Plug and Play ID............ AOC1716
  Serial number............... D3277JA098593
  EDID data source............ I2C bus (real-time)
  Manufacture date............ 2007, ISO week 28
  EDID revision............... 1.3
  Display type and signal..... Analog 0.700,0.000 (0.7V p-p)
  Sync input support.......... Separate
  Screen size................. 340 x 270 mm (~18")
  Power management............ Standby, Suspend, Active off/sleep

Color characteristics
  Display gamma............... 2.20
  Red chromaticity............ Rx 0.652 - Ry 0.324
  Green chromaticity.......... Gx 0.300 - Gy 0.596
  Blue chromaticity........... Bx 0.143 - By 0.078
  White point (default)....... Wx 0.313 - Wy 0.328

Timing characteristics
  VESA GTF support............ Not supported
  Horizontal scan range....... 29-49kHz (est.)
  Vertical scan range......... 48-75Hz (est.)
  Video bandwidth............. 80MHz (est.)
  Extension blocks............ n/a
  Timing recommendation #1.... 1280x720 at 60Hz
      Modeline................ "1280x720" 74.500 1280 1344 1472 1664
720 723 728 748 -hsync +vsync

Standard timings supported
   640 x  480 at  60Hz - IBM VGA
   640 x  480 at  67Hz - Mac II
   640 x  480 at  72Hz - VESA
   640 x  480 at  75Hz - VESA
   720 x  400 at  70Hz - IBM VGA
   800 x  600 at  56Hz - VESA
   800 x  600 at  60Hz - VESA
   800 x  600 at  72Hz - VESA
   800 x  600 at  75Hz - VESA
   832 x  624 at  75Hz - Mac II
  1280 x  720 at  60Hz - AOC
  1280 x  720 at  60Hz - VESA

Raw EDID base
  00: 00 FF FF FF FF FF FF 00  05 E3 16 17 21 81 01 00
  10: 1C 11 01 03 68 22 1B 78  E8 0E 80 A7 53 4C 98 24
  20: 14 50 54 BF E0 00 81 C0  01 01 01 01 01 01 01 01
  30: 01 01 01 01 01 01 1A 1D  00 80 51 D0 1C 20 40 80
  40: 35 00 54 0E 11 00 00 1C  00 00 00 FF 00 44 33 32
  50: 37 37 4A 41 30 39 38 35  39 33 00 00 00 FD 00 32
  60: 4B 1F 3A 08 00 0A 20 20  20 20 20 20 00 00 00 FC
  70: 00 37 31 36 53 77 0A 20  20 20 20 20 20 20 00 74

Display adapter
  Adapter description......... Mobile Intel(R) 915GM/GMS,910GML
Express Chipset Family
  Adapter device ID........... 0x25928086
  Display settings............ 800x600, 32bpp

As you can see the max resolution for this monitor is   1280 x  720.
The AOC driver was installed, and the 915GM/GMS 910GML spec (if I
understand it correctly) should support it (see below, taken from: ).
Still - I can't get it to work. Any ideas? I'm ready to replace this
monitor with 19" that supports 1440x900 but how can I know if that
will work?

Those are the resolution specs taken from: Mobile Intel(R) 915 and 910
Express Chipset Family of Products Datasheet

10.10.4 LVDS panel support
Table 10-12. LVDS Panel support
LVDS panel XGA
1024 x 768
1280 x 1024
1400 x 1050
1600 x 1200
Intel 915GM X X X X
Intel 915GMS * X X X
Intel 910GML X X X
Note: Intel 915GMS only supports single channel LVDS panel types.
Table 10-13. LVDS Wide Panel support
1280 x 760
1600 x 900
1920 x 1200
Intel 915GM X X X
Intel 915GMS * X
Note: Intel 915GMS only supports single channel LVDS panel types.



Re: Support wide screen resolution on R52 thinkpad


Thanks again for the help.
I tried all the above options - the INF change of the driver had no
effect - the new resolution never showed up in the options list. I
tried creating my own driver using IEGD - followed the instruction and
spent most of a day with different trials but all I manage to do is to
get red and blue squares on the screen over a blank background...

Then I tried PowerStrip and I managed to implement custom resolution
of 1280X720.
I don't' understand how exactly PowerStrip works and I wonder and
there is a "cost" in term of monitor performances to this solution?

Note also that the original 915GM /GMS resolutions list doesn't
include 1280X720 (I thought it does but I see now it was 1280 x 760).
I wonder if this is only a driver issue or inherited property of the


Re: Support wide screen resolution on R52 thinkpad wrote:
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I wasn't going to suggest PowerStrip, because in the past they didn't
support chipset graphics (only ATI and Nvidia separate graphics cards had
good support). If you got it to work, there is no performance penalty.

The Entechtaiwan site has a FAQ page.

This is why I didn't suggest PowerStrip.

For quite some time, display devices have had programmable registers
for output resolution. Even the graphics card I built for my home computer
in the 80's had programmable registers. There are rules (like some have
the restriction that horizontal must be divisible by 8, vertical
divisible by 2), but other than that, you should be able to program
them over a wide range.


Re: Support wide screen resolution on R52 thinkpad


I certainly learned a lot from this session. It's only for the best
that I ended up with the simplest solution. Apparently PowerStrip is
supporting much wider range of hardware since they publish that answer
in 2003...

Thanks again for the help,


Re: Support wide screen resolution on R52 thinkpad wrote:
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Well, that answers the first question. It seems your display has a full EDID.

First, some display control panels have an option to "show supported resolutions"
or "show all resolutions". Sometimes, the less familiar resolution options are

In this article, they say:

    "Normally speaking, the Intel drivers seem to provide the standard list of
     640x480, 1024x768, even some "home theater" resolutions like 1920x1080 and

I'm not convinced you should have to hack the driver to get what you want.

Also, when reading articles like that one, be aware that in discussions of
notebook GPUs, there is driving the panel in the notebook itself, and then
there is driving the external monitor. Intel goes to great pains in their
documentation, to solve the first problem. So when you see an article like
the above one, verify they are actually talking about the external monitor
connection, and not solving an internal problem.

I found the above article, as a link on this page. But this one may be describing
the internal panel in the notebook, and I'm not sure about that.

I think the resolution should really be visible in the panel already.
And your external monitor seems to be doing the right things.

A couple more articles - none of this should be necessary:

You wouldn't want to start this exercise in cloning mode, because that
might restrict the available resolutions. You'd want the two displays to
be independent.

I was hoping to find some pictures of the display control panel, to
see what options are available. For example, one release note mentioned
a "custom resolution dialog".


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