Linux IC5.0 Virtuoso display problems

Discussion in 'Cadence' started by Dee, Sep 10, 2003.

  1. Dee

    Dee Guest

    I'm using icfb v5.0.32.500.5 and virtuoso am having problems
    displaying parts of my layout. Certain metal constructs drawn using
    polygon are only displayed with an outline of the metal shape and is
    not filled. When the metal is drawn with path, this problem is not there.

    The outline is visible at most zoom levels - with different shapes
    being outlined at different times (ie not all of the polygons are
    outlined at any given zoom) This problem persists regardless of the
    display filter size/style under Options -> Display -> Filter

    This problem also exists with v5.0.0.500.28. My configuration
    is a Dell 650 dual xeon with ATI Radeon VE (32MB) (aka ATI
    Radeon 7000) running RH8.0 with all the latest patches and xfree86 v4.2.0
    using 24-bit depth

    I've tried disabling hardware acceleration but the problem is still there.

    Interestingly, if I access the machine remotely from home, (linux box with
    nVidia Geforce2 MX200 video card, xfree86 v4.2.0) this problem is not
    there (using the same Virtuoso display/editor settings)

    Any help is greatly appreciated.
    Dee.
     
    Dee, Sep 10, 2003
    #1
  2. Dee

    Guest Guest

    You're absolutely certain you've disabled hardware acceleration properly on
    on the system with the ATI Radeon hardware?

    Because this describes exactly the problem we've seen that is fixed that
    way. The fact that you do not see the problem with the nVidia card seems
    to confirm this.

    The instructions I have for turning off hardware acceleration are:

    1. Turn off hardware acceleration on your video card.

    To do this, as root edit the file: /etc/X11/SF86Config-4
    and find the section:

    Section "Device"
    Identifier "<graphics card/chip name>"
    Driver "<graphics driver name>"
    VendorName "<graphics vendor name>"
    BoardName "<graphics board name>"
    EndSection

    and add the line:

    Option "noaccel"

    2. Restart X Server:

    Hold Control and Alt keys and Click on "Back Space" key.

    -Pete Zakel
    ()

    Justice, n.:
    A decision in your favor.
     
    Guest, Sep 10, 2003
    #2
  3. Dee

    Dee Guest

    Pete,
    This seems to have done the job - the first time I turned off h/w
    acceleration was through the RH display config tool (which apparently
    did not work) Thanks!

    What about the h/w acceleration is causing the problem? (and only for polygons?)

    But now I have the problem that anything display related in X is
    REALLY sloooww.

    ex: in Cadence, I have the right mouse button set to zoom, but there is a ~2
    second delay after I click before the drag window shows on screen...

    Is there some other workaround for the slow X graphics?

    Thanks,
    Dee.
     
    Dee, Sep 11, 2003
    #3
  4. Dee

    Guest Guest

    You're welcome!
    I don't know. As far as I know we didn't analyze the problem beyond finding
    the workaround.
    Not that I'm aware of other than either using a different graphics card,
    possibly updating the driver, or possibly upgrading to a commercial X server
    such as Xi Graphics' Accelerated-X.

    -Pete Zakel
    ()

    "The best thing about growing older is that it takes such a long time."
     
    Guest, Sep 11, 2003
    #4
  5. Dee

    Erik Wanta Guest

    Dee:
    The solution is to enable hardware acceleration. Just comment out
    Option "noaccel".

    I find that hitting cntl-r is less annoying than really slow graphics.

    Does anyone have any ideas on the root cause of this problem?
     
    Erik Wanta, Sep 11, 2003
    #5
  6. Dee

    Dionis Guest

    Hi all

    Try to use "ShadowFB" instead of "NoAccel" (Put: Option "ShadowFB"
    "True" in XF86Config). This will help with Cadence tracking cursor and
    slow graphics and it won't disable hardware acceleration. I used it on
    Matrox G550 card on RH8 XFree86 4.2.1 and 4.3.

    Regards
    Dionis
     
    Dionis, Sep 12, 2003
    #6
  7. Dee

    Erik Wanta Guest

    Dionis:
    I have verified that setting Option "ShadowFB" "True" does fix the
    graphics redraw problem that I was having with my ATI Radeon Mobility
    7500. Thank you for the post.
     
    Erik Wanta, Sep 13, 2003
    #7
  8. Dee

    Dee Guest

    Unfortunately, "ShadowFB" did not solve my outlined-polygon problem :(

    Any other suggestions (other than "noaccel")?

    Regards,
    Dee.
     
    Dee, Sep 15, 2003
    #8
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