13 Replies Latest reply: Feb 16, 2007 11:00 PM by TotoTron
rublind Level 1 Level 1 (0 points)
I just bought the DVI cables for my macbook, so I can watch dvd's 'n stuff on ye olde tv. Unfortunately, when I set the TV to it's highest progressive resolution (1360x768) the image on the tv is shifted to the left AND there is a weird vertical bar on the left portion of the screen where everything is cut off. If necessary, I can take a picture to show this.

Does anybody know how to fix this problem?

Note: I've read the other forum posts, there are no overscan options on my tv, and I played with the ones on the laptop.


Correction: the display isn't working properly on 1280x1024 either. The right side drags out (don't know how to explain it) and the left side is still cut off a bit.
Thanks.

Intel MacBook 1G Mac OS X (10.4.8)

Message was edited by: rublind (correction added)
  • 1. Re: Westinghouse 32w3 LCD HDTV + Intel MacBook 1G Problem
    Vic Z Level 2 Level 2 (270 points)
    For HD first open the display panel in systems preferences. Make sure you have mirroring unchecked. Use Gather Displays to bring the display panel for your TV onto the computer screen. Select either 1280x720 or 1920x1080. Make sure the refresh rate selector is properly set (60 Hz NTSC for the US). This should now be fine.
  • 2. Re: Westinghouse 32w3 LCD HDTV + Intel MacBook 1G Problem
    rublind Level 1 Level 1 (0 points)
    I did that. The refresh rate is automatically set.

    It did not fix the problem. The screen is nudged over, but the last pixel on the right side is dragged out to the end of the screen. The left edge still is cut off as well.
  • 3. Re: Westinghouse 32w3 LCD HDTV + Intel MacBook 1G Problem
    BSteely Level 5 Level 5 (7,635 points)
    It sounds like the polarity of horizontal sync may be flipped from what the TV is expecting. The only way I know to change sync polarity is with a third party program like SwitchRes X (I recommend the Control Panel version over the full version download).

    What I am not totally clear on is whether the graphics chip in the MacBook supports negative sync. It may only support positive sync, which is why it may be flipped to begin with. But it can't hurt to try since you can use SRX for free for a trial period of something like 15 days.
  • 4. Re: Westinghouse 32w3 LCD HDTV + Intel MacBook 1G Problem
    rublind Level 1 Level 1 (0 points)
    How would I go about flipping the sync thinger?
  • 5. Re: Westinghouse 32w3 LCD HDTV + Intel MacBook 1G Problem
    BSteely Level 5 Level 5 (7,635 points)
    In SwitchRes X, you would create a custom resolution. In doing so, one of the options is to set the sync polarity. You will see this in a check box within the custom settings pane. If the setting for "Positive sync" already has a check mark in it, then uncheck it, save and restart and then select the newly created timing.
  • 6. Re: Westinghouse 32w3 LCD HDTV + Intel MacBook 1G Problem
    rublind Level 1 Level 1 (0 points)
    That didn't solve the problem. =[
  • 7. Re: Westinghouse 32w3 LCD HDTV + Intel MacBook 1G Problem
    Vic Z Level 2 Level 2 (270 points)
    Hmm. Well the good news is that it definitely is possible to drive an HD LCD TV from a Macbook (or intel iMac) via a mini DVI adaptor, I know because I do it. Are you confident about your cable? Any chance of trying a different one?
  • 8. Re: Westinghouse 32w3 LCD HDTV + Intel MacBook 1G Problem
    rublind Level 1 Level 1 (0 points)
    It's a Belkin Cable, and the adapter comes from Apple. I'm pretty confident about it. But if need be, I guess I can try another cable.
  • 9. Re: Westinghouse 32w3 LCD HDTV + Intel MacBook 1G Problem
    BSteely Level 5 Level 5 (7,635 points)
    Can you post your TV's EDID here? If you go into SwitchRes X and click on the Resolutions icon in the main working pane, and then click on Display in the lower bar, there is an "Export DDC" button. Clicking on it produces a text file from the driver data (EDID) inside the TV. There may be some good clues in there as to what is up.

    I'm still suspecting the TV wants negative sync and that the Intel GMA 950, as applied in the mini and the MacBook, doesn't support this. If that's the case, there may not be anything to do about it.

    Do you have another Mac at your disposal other than your MB? I'd be curious to know if another Mac can drive the TV without problem.
  • 10. Re: Westinghouse 32w3 LCD HDTV + Intel MacBook 1G Problem
    rublind Level 1 Level 1 (0 points)
    Yeah, I couldn't find anyone with a cable. =[
  • 11. Re: Westinghouse 32w3 LCD HDTV + Intel MacBook 1G Problem
    rublind Level 1 Level 1 (0 points)
    EDID Version........1.3
    Manufacturer........WDE
    Product Code........10034 (2732) (3227)

    Is that it?
  • 12. Re: Westinghouse 32w3 LCD HDTV + Intel MacBook 1G Problem
    BSteely Level 5 Level 5 (7,635 points)
    That's the whole thing? Usually there is a lot more information in EDID about timings the TV/monitor expects. Here is a typical EDID:


    ==================== Begin ======================
    0 1 2 3 4 5 6 7 8 9 A B C D E F
    -----------------------------------------------------------------------
    0 | 00 FF FF FF FF FF FF 00 42 93 FD 02 24 2E 01 00
    1 | 2B 0F 01 03 68 22 1B 96 2A 6E 06 A1 54 4C 99 26
    2 | 19 4F 54 BF EF 00 81 90 71 46 71 50 01 01 01 01
    3 | 01 01 01 01 81 80 30 2A 00 98 51 00 2A 40 30 70
    4 | 13 00 51 0E 11 00 00 1E 00 00 00 FD 00 3C 4B 1E
    5 | 50 0E 00 0A 20 20 20 20 20 20 00 00 00 FC 00 41
    6 | 59 37 36 35 0A 20 20 20 20 20 20 20 00 00 00 FF
    7 | 00 46 32 51 59 35 41 32 37 37 33 34 38 55 00 C7

    -----------------------------------------------------------------------
    { 0x00FF, 0xFFFF, 0xFFFF, 0xFF00, 0x4293, 0xFD02, 0x242E, 0x0100, 0x2B0F, 0x0103, 0x6822, 0x1B96, 0x2A6E, 0x06A1, 0x544C, 0x9926, 0x194F, 0x54BF, 0xEF00, 0x8190, 0x7146, 0x7150, 0x0101, 0x0101, 0x0101, 0x0101, 0x8180, 0x302A, 0x0098, 0x5100, 0x2A40, 0x3070, 0x1300, 0x510E, 0x1100, 0x001E, 0x0000, 0x00FD, 0x003C, 0x4B1E, 0x500E, 0x000A, 0x2020, 0x2020, 0x2020, 0x0000, 0x00FC, 0x0041, 0x5937, 0x3635, 0x0A20, 0x2020, 0x2020, 0x2020, 0x0000, 0x00FF, 0x0046, 0x3251, 0x5935, 0x4132, 0x3737, 0x3334, 0x3855, 0x00C7};
    -----------------------------------------------------------------------
    < 00FFFFFF FFFFFF00 4293FD02 242E0100 2B0F0103 68221B96 2A6E06A1 544C9926 194F54BF EF008190 71467150 01010101 01010101 8180302A 00985100 2A403070 1300510E 1100001E 000000FD 003C4B1E 500E000A 20202020 20200000 00FC0041 59373635 0A202020 20202020 000000FF 00463251 59354132 37373334 385500C7 >
    -----------------------------------------------------------------------
    Valid DDC block: checksum passed

    EDID Version........1.3
    Manufacturer........PTS
    Product Code........64770 (FD02) (02FD)
    Serial Number.......77348

    Manufactured........Week 43 of year 2005
    Max H Size..........34 cm
    Max V Size..........27 cm
    Gamma...............2.50

    DPMS Supported Features:
    ------------------------
    Active off

    Display type:
    -------------
    RGB color display


    Input signal & sync:
    --------------------
    Analog input with: 0.700V / 0.000V
    Composite Sync


    Color info:
    ------------
    Red x = 0.630 Green x = 0.300 Blue x = 0.148 White x = 0.310
    Red y = 0.330 Green y = 0.600 Blue y = 0.098 White y = 0.330

    Established Timings:
    --------------------
    800 x 600 @ 60Hz
    800 x 600 @ 56Hz
    640 x 480 @ 75Hz
    640 x 480 @ 72Hz
    640 x 480 @ 67Hz
    640 x 480 @ 60Hz
    720 x 400 @ 70Hz
    1280 x 1024 @ 75Hz
    1024 x 768 @ 75Hz
    1024 x 768 @ 70Hz
    1024 x 768 @ 60Hz
    832 x 624 @ 75Hz
    800 x 600 @ 75Hz
    800 x 600 @ 72Hz

    Manufacturer's Reserved Timings:
    --------------------------------

    Standard Timing Identification:
    -------------------------------
    #0: 1280 x 1024 @ 76Hz (8190)
    #1: 1152 x 864 @ 66Hz (7146)
    #2: 1152 x 864 @ 76Hz (7150)
    #7: 1280 x 1024 @ 60Hz (8180)

    Monitor Description blocks:
    ---------------------------
    Descriptor #0 is Timing definition:
    Mode = 1280 x 1024 @ 60Hz
    H. Active...............1280 pixels
    H. Blanking.............408 pixels
    V. Active...............1024 lines
    V. Blanking.............42 lines
    HSync Offset............48 pixels
    HSync Pulse Width.......112 pixels
    VSync Offset............1 lines
    VSync Pulse Width.......3 lines
    Pixel Clock.............108.00MHz
    Horizontal freq.........63.98kHz
    Vertical freq...........60.02Hz
    H Image Size............337mm
    V Image Size............270mm
    H Border................0 pixels
    V Border................0 lines
    Non-Interlaced
    Sync: Digital separate with
    * Positive vertical polarity
    * Positive horizontal polarity

    Descriptor #1 is Monitor limits:
    Horizontal frequency range.......30-80 kHz
    Vertical frequency range.........60-75 Hz
    Maximum bandwidth unspecified

    Descriptor #2 is Monitor name:
  • 13. Re: Westinghouse 32w3 LCD HDTV + Intel MacBook 1G Problem
    TotoTron Level 1 Level 1 (10 points)
    Hi, I have the Westinghouse LVM-42w2 and the image was also shifted to the left, creating the same cropped + blurred picture you described.

    Using SwitchResX you can shift the image to the right using the Quick Change navigational buttons. This decreases the front porch (while naturally increasing the back porch).

    After you apply the changes, it may prompt you to restart before the new settings can be applied. You can reset the image by unplugging the mini-DVI cable and plugging it back in.

    Just keep shifting the image by a few pixels until it's perfectly centered.