TGA on UDB: Found an unknown TGA chip

[Max Paklin <max2 home com>]

Hi, everybody!

I'm sure that somebody has already solved this problem. Yes, I read the
archives and I have done everything that was suggested. But the thing still
doesn't work. I'd appreciate very much if somebody could point to the
mistake in my XF86Config.

Info:
RedHat 5.0 on UDB. The latest patch to XF86Free is applied.
I run XConfigurator and chose "Unlisted VGA" -> "TGA" -> "Unlisted monitor"
-> "50-100Hz" -> "bt845" RAMDAC -> No clock chip -> skip probing -> mode
8bit 640x480. I picked up MemBase address from /proc/pci. My monitor is
CornerStone 17/76 based on Hitachi 17" tube. I also tried "ViewSonic 17PS"
because it seems to be close to the one that I have.

Diagnostic prints:
----------------------------------------------------------------------
(**)DEC_TGA: Graphic Device ID: "My Video Card"
(**)DEC_TGA: Monitor ID: "ViewSonic17PS"
(--)DEC_TGA: Invalid vertical timing for mode "400x300". Deleted
(**)DEC_TGA: Memory base address: a0000000
(**)DEC_TGA: Font Path Set to "/usr/X11R6/lib/X11 ....
(--)DEC_TGA: OUCH! Found an unknown TGA chip. Aborting ...

*** None of configured devices were detected ***

Fatal server error:
no screens found.
----------------------------------------------------------------------


Snippet from XF86Config:
----------------------------------------------------------------------
Section "Device"
    Identifier        "My Video Card"
    VendorName        "Unknown"
    BoardName         "Unknown"
    Chipset           "TGA"
    VideoRam          2048
    Option            "dac_8_bit"
    MemBase           0xa0000000
    Ramdac            "bt845"
    #Clocks
End Section

Section "Screen"
    Driver            "VGA16"
    Device            "My Video Card"
    Monitor           "ViewSonic 17PS"
    Subsection        "Display"
        Modes         "640x480" "800x600"
        Viewport      0 0
        Virtual       800 600
    End Subsection
End Section
----------------------------------------------------------------------

I tried to add/remove VideoRam, Option and Clocks lines in a different
combinations. Still no luck... And I don't actually know what clocks should
I put (should I?) in Device section. Does anybody have a clue on what's
wrong here?

Thanks,
Max.