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Date:      Tue, 21 Feb 95 11:29:41 GMT
From:      johnb@mailserver.aixssc.uk.ibm.com
To:        freebsd-questions@FreeBSD.org
Subject:   XF86Config HTimings
Message-ID:  <21737.9502211129@grey.aixssc.uk.ibm.com>

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Hello,

I hope I've got the correct mailing list for this one.
If there's a specific list for XFree86, please let me know.

I am trying to setup my XF86Config file so that I can use 1024x768 with
256 colours. I've setup a corresponding mode in the "Monitor" section of
the file and I'm referencing it from the "Display" subsection of my "Screen"
section, however I think I'm coming unstuck with the HTimings of my mode.
I've currently got them set to :-

        HTimings        1024 1048 1208 1264 

but I suspect this is wrong because when I run startx I get an error
message which says :-

  (--) SVGA: Mode "1024x768i" needs hsync freq of 28.16 kHz. Deleted.

and so the mode can't be used and the X server doesn't start.
I don't know what the HTimings mean and the XF86Config man page doesn't
really explain them, so I'm a bit lost. I've tried other values, but
I'm worried that I might damage my monitor.

Can anyone help?

Here's the full output from startx, following by relevant sections (I think!)
from my XF86Config file ...

startx output
-------------

XFree86 Version 3.1 / X Window System
(protocol Version 11, revision 0, vendor release 6000)
Operating System: FreeBSD 2.0 
Configured drivers:
  SVGA: server for 8-bit colour SVGA (Patchlevel 0):
      et4000, et4000w32, et4000w32i, et4000w32p, et3000, pvga1, wd90c00,
      wd90c10, wd90c30, wd90c31, wd90c33, gvga, vgawonder, tvga8800cs,
      tvga8900b, tvga8900c, tvga8900cl, tvga9000, clgd5420, clgd5422,
      clgd5424, clgd5426, clgd5428, clgd5429, clgd5430, clgd5434, clgd6205,
      clgd6215, clgd6225, clgd6235, ncr77c22, ncr77c22e, cpq_avga, oti067,
      oti077, mx, al2101, cl6420, video7, generic
Using syscons driver with X support (version 1.3)
(using VT number 4)

XF86Config: /usr/X11R6/lib/X11/XF86Config
(**) stands for supplied, (--) stands for probed/default values
(**) Mouse: type: Microsoft, device: /dev/tty00, baudrate: 1200,
       3 button emulation
(**) SVGA: Graphics device ID: "Any Trident TVGA 9000"
(**) SVGA: Monitor ID: "Generic Monitor"
(--) SVGA: Mode "1024x768i" needs hsync freq of 28.16 kHz. Deleted.
(**) FontPath set to "/usr/X11R6/lib/X11/fonts/misc/,/usr/X11R6/lib/X11/fonts/75dpi/"
(**) SVGA: chipset:  tvga9000
(**) SVGA: videoram: 1024k
(**) SVGA: clocks:  25.00  28.00  45.00  36.00  57.00  65.00  50.00  40.00
(**) SVGA: clocks:  25.00  28.00   0.00  45.00  72.00  77.00  80.00  75.00
(--) SVGA: Maximum allowed dot-clock: 90.000 MHz
(--) SVGA: There is no mode definition named "1024x768i"

Fatal server error:
No valid modes found.

X connection to :0.0 broken (explicit kill or server shutdown).


XF86Config file (relevant sections)
-----------------------------------

Section "Monitor"
    Identifier	"Generic Monitor"
    VendorName	"Unknown"
    ModelName	"Unknown"
    Bandwidth	25.2
    HorizSync   30-37  # PanaSync C1381
    VertRefresh 50-90   # PanaSync C1381

    Mode "640x480"
        DotClock	25.175
        HTimings	640 664 760 800
        VTimings	480 491 493 525
    EndMode

    Mode "1024x768i"
        #DotClock	45
        DotClock	35.6
        HTimings	1024 1048 1208 1264
        #HTimings	1024 1000 1000 1000   # SENDS SCREEN FUNNY!!
        VTimings	768 776 784 817
        Flags		"Interlace"
    EndMode
EndSection

Section "Device"
    # SVGA server auto-detected chipset
    Identifier	"Generic SVGA"
    VendorName	"Unknown"
    BoardName	"Unknown"
EndSection

Section "Device"
   Identifier	"Any Trident TVGA 9000"
   VendorName	"Trident"
   BoardName	"TVGA 9000"
   Chipset	"tvga9000"
   #VideoRam	512
   VideoRam	1024
   Clocks	25 28 45 36 57 65 50 40 25 28 0 45 72 77 80 75
EndSection

Section "Screen"
    Driver	"svga"
    #Device	"Generic SVGA"
    Device	"Any Trident TVGA 9000"
    Monitor	"Generic Monitor"
    Subsection "Display"
        Depth	    8
        Modes	    "640x480"
        #Modes	    "1024x768i"
        ViewPort    0 0
        Virtual     800 600
    EndSubsection
EndSection
-- 
 __            __
  | _ |_  _   |__)     |_ _  _
__)(_)| )| )  |__)|_|)(|_(_)| )

-------------------------------------------
John Buxton
IBM AIX Support Specialist, ADG Group
AIX Support Centre, 11th Floor
Alencon House, Basingstoke
Hampshire, United Kingdom
-------------------------------------------
Personal calls:	    0256 343000 x316887
AIX Support Centre: 0256 811587
email:		    johnb@aixssc.uk.ibm.com
-------------------------------------------



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