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Jittery digitizer on a Toshiba Portege 3500 Tablet PC? Pen stopped working? Try this

  • Artikel

I just fixed an annoying problem on my old Toshiba Tablet PC - the pen stopped working. To be precise, when I tried to use it the mouse pointer would flicker madly along the top and left edges of the screen, totally unable to track the real position of the pen. And the issue is apparently that a fresh install of XP SP2 disabled "Display Stretch" in the BIOS.

display stretch"Display Stretch" is of course the ugly hack that turns a perfectly readable 640x480 boot screen in the middle of your 1024x768 LCD into a blotchy mis-scaled mess that fills the entire display, and makes you wonder just who thought this would make a good impression on someone booting the laptop for the first time. But it turns out to be vitally important for the peaceful interaction of the Toshiba's digitizer and its Trident CyberBlade video chipset - turn it off and all hell breaks loose, penwise. Knowing this, and assuming that you've got driver version 6.4229.22ICD_Rotation_SE_DXVA_TABLET or later, just open Display Properties\Settings\Advanced\Flat Panel, and check the "Display Stretch" box. Voila!

Big kudos to whoever it was in Microsoft tech support who first tracked this one down and wrote up the solution…

Comments

  • Anonymous
    September 07, 2004
    jonathan you have saved my life!!!! i think my tablet was broken :) thanks so muuuuch :)
  • Anonymous
    September 08, 2004
    in my case was after installing the new driver version of video :( before installing win xp sp2
  • Anonymous
    May 10, 2005
    I just spent over an hour on the Tablet PC site and could not find the solution to my problem. Your suggestion fixed it in 30 seconds. Thank you, thank you, thank you!
  • Anonymous
    May 31, 2005
    Dude, just scored a 3500 from work, thought i'd broken it in less than 2 hours (a new record). And i'm normally the one that fixes these things. Pity i hate the display stretch so much. Love your work.
  • Anonymous
    July 12, 2005
    Ever since I upgraded to WinXP SP2 I wondered what'd happened to my tablet. Nothing easy to find in Toshiba or Microsoft--but a Google search on 'toshiba tablet PC tracking problem' turns up this as the top choice. Now that's helpful!

    Thank you
  • Anonymous
    August 02, 2005
    WOW!!! I was having the same problem and thought my tablet was a gonner. This fixed it right up. Thank you so much for taking the time to make this post!
  • Anonymous
    October 14, 2005
    I will like to know what is LCD Display Stretch functions for.

    Thank in advance.


    Rgds,
    Phoebe
  • Anonymous
    October 14, 2005
    Hi Phoebe - Display Stretch is used to expand low-res video modes (e.g. the 640x480 splash screen as Windows boots up) to the full size of the LCD display (1024x768 for this Toshiba)
  • Anonymous
    January 23, 2006
    The comment has been removed
  • Anonymous
    January 24, 2006
    I have a different problem. Dead pixels at the left side of the tablet. This problem introduced itself after "upgrading" to service pack 2. No amount of calibration seems to help. And when I do calibrate now, the cursor is not directly under the pen tip. It's not the pen because other pens have the same problem.

    Please advise! Leave a comment on my blog if you have dealt with this. (or here)