Question: Setting up monitor timings and dot clocks, I'm a little baffled.

Question: Setting up monitor timings and dot clocks, I'm a little baffled.

Post by Bill G88 » Mon, 27 Jan 1997 04:00:00

O.k. I got linux installed, the slackware version and XFree86 installed and
I could get it to run in the default vga16 color mode which sucks.  I have
an svga compudyne 1040KT like listed in the modesDB.txt file and I set the
sync rates for the 65hz per someone's notes in that file.  I have  a Bali32
vlb video card with 1mb dram.  I'll be darned if I have any idea what he
dot clocks are supposed to be but I'm kicking through the manual and I came
back with 44.9 65 75 80 for clocks.  I put this stuff in and when the x
server runs I get a big virtual screen of garbage.  My only guess is
somewhere in there there's a refresh rate gone crazy. I've never configured
this stuff before maybe someone has a suggestion?  I don't know where to go
I've been juggling settings all day.


1. Mach64 'Dot Clocks', Daewoo Monitor 'Modelines'?

  I have two questions.  I have not set up many X windows systems, so am a
beginner here.  I have a Mach64 graphics card (Yes, I know the accelerated
server is not available), and a Daewoo SVGA monitor.

  With the Mach64 I let X scan the card and come up with some dot clock
settings, but I'm not sure if they are correct or valid - does anyone with
more X experience and one of these cards have a more valid set of clocks?

Section "Device"
    Identifier "Mach64"
    VendorName "ATI"
    Chipset "vgawonder"
    BoardName "Unknown"
    Clocks 18 22 25 28 36 44 50 56 30 32 37 39 40 0 75 65
#    Clocks 0.00 110.46 126.02 135.07  50.23  56.63  63.00  72.03
#    Clocks 0.00  79.95  75.00  65.00  39.96  44.79  49.46  49.92
#    Clocks 0.00  55.05  63.00  67.52  25.11  28.30  31.49  36.06
#    Clocks 0.00  39.97  37.47  32.50  20.01  22.39  24.73  24.96

  The comment out clocks are the ones that I got from a scan, the others
are from a message posted on the net a while ago.

  With the monitor I am able to do 800x600 with no problem, but while the
manual says that I can do 1024x768 non-interlaced, I get a very flickering
screen when going into that mode.  Does anyone have some more valid
'Modeline' lines for these resolutions, or would be able to explain to me
in simple terms exactly how to figure one out myself?

Section "Monitor"
    Identifier "Daewoo-1501"
    VendorName "Daewoo"
    ModelName "CMC-1501BA/MPR"
    BandWidth 75 MHz
    HorizSync 31-60 KHz
# Blanking time Min 3.4 micro-sec, Resolution Max 1024 (non-interlaced)
    VertRefresh 50-90 Hz
# Blanking time Min 0.45 msec, Resolution Max 786 Lines
    ModeLine "800x600" 36 800 808 944 984 600 608 612 633
    Modeline "1024x768"    65    1024 1032 1176 1344   768  771  777  806


 Russell McOrmond, Ottawa Ontario, Canada.  Work: World Wide Web developer
 Array Development (613) 733-4464  Fax: 733-5691
 Standard Disclaimer applies:  I didn't do it, it was an accident!
 <a href="">Russell's Home Page</a>

2. Three urgently needed things

3. Dot-clock settings for IBM 9504 fixed frequency monitor

4. SBPro & CDROM: Which drive?

5. dot clocks & mode timings

6. streamer: Conner 2525S SCSI

7. Dot Clock timings

8. On computers and cars ...

9. Shape Ups,Men's Shape Ups,Men's Skechers Shape Ups - new styles!

10. Converting milisecond video timings to dot & line timings?

11. Please, monitor timings for Nec4fg for 25 28 36 40 44 62 clocks ??

12. VideoModes - dot clock for GW2K CrystalScan 700 monitor

13. PB8549SVGL monitor dot clock rate