Samsung 19'' LCD

coolnicklas · 11-30-2005, 04:39 PM

Hi,

I recently invested in a Samsung 19'' LCD Monitor (970p) with a native resolution of 1280x1024@75Hz. My previous monitor was a 17'' ADI CRT monitor which i used both with Linux (Debian testing)and Windows using an KVM-switch.

Now to the problem: I can't make this new monitor work with my Linux box, an Via epia 5000. The epia 5000 of course only has vga output which should work fine with the 970P's DVI-I connector (using an adapter).

I have tried 1024x768 and 800x600 with color depth 16 and 24 and with refresh rate

HorizSync: 30.0-70.0
VertRefresh: 60.0

Which should mean "60 Hz".

I have tried other values as well. With these settings I am able to get output on the screen, however it looks awful. When trying to set the native resolution, 1280x1024 and color depth 16, xserver will hang and there is no signal out from the VGA at all and the screen goes into sleep mode.

Hints anyone?

Part of XF86Config-4 below:
***********************************************************
Section "Device"
Identifier "Trident Microsystems CyberBlade/i1"
Driver "trident"
EndSection

Section "Monitor"
Identifier "Samsung 970P"
HorizSync 30.0-70.0
VertRefresh 60.0
Option "DPMS"
EndSection

Section "Screen"
Identifier "Default Screen"
Device "Trident Microsystems CyberBlade/i1"
Monitor "Samsung 970P"
DefaultDepth 16
SubSection "Display"
Depth 1
Modes "1024x768" "800x600" "640x480"
EndSubSection
SubSection "Display"
Depth 4
Modes "1024x768" "800x600" "640x480"
EndSubSection
SubSection "Display"
Depth 8
Modes "1024x768" "800x600" "640x480"
EndSubSection
SubSection "Display"
Depth 15
Modes "1024x768" "800x600" "640x480"
EndSubSection
SubSection "Display"
Depth 16
Modes "1280x1024" "640x480"
EndSubSection
EndSection

Section "ServerLayout"
Identifier "Default Layout"
Screen "Default Screen"
InputDevice "Generic Keyboard"

tibbar · 12-01-2005, 09:16 AM

sounds like you have similar monitor to me, i have 19" 930BS from samsung, which has same resolution.

im on SUSE, and the control panel could read the monitor details from the vendor driver cd that comes with the monitor, this generates following settings in xorg.conf:

Code:

Section "Monitor"
  DisplaySize  386 290
  HorizSync    31-81
  Identifier   "Monitor[0]"
  ModelName    "SYNCMASTER 930B/930BC/930BF(DIGITAL)"
  VendorName   "SAMSUNG"
  VertRefresh  62-75
  UseModes     "Modes[0]"
EndSection

Section "Modes"
  Identifier   "Modes[0]"
  Modeline 	"1280x1024" 134.72 1280 1368 1504 1728 1024 1025 1028 1068
  Modeline 	"1280x1024" 114.54 1280 1360 1496 1712 1024 1025 1028 1062
  Modeline 	"1280x960" 126.27 1280 1368 1504 1728 960 961 964 1001
  Modeline 	"1280x960" 107.32 1280 1360 1496 1712 960 961 964 995
  Modeline 	"1280x800" 104.35 1280 1360 1496 1712 800 801 804 835
  Modeline 	"1280x800" 88.68 1280 1352 1488 1696 800 801 804 830
  Modeline 	"1152x864" 102.08 1152 1224 1352 1552 864 865 868 901
  Modeline 	"1152x864" 86.70 1152 1224 1344 1536 864 865 868 896
  Modeline 	"1280x768" 99.17 1280 1352 1488 1696 768 769 772 801
  Modeline 	"1280x768" 84.35 1280 1344 1480 1680 768 769 772 797
  Modeline 	"1024x768" 79.52 1024 1080 1192 1360 768 769 772 801
  Modeline 	"1024x768" 67.48 1024 1080 1184 1344 768 769 772 797
  Modeline 	"800x600" 47.53 800 840 920 1040 600 601 604 626
  Modeline 	"800x600" 40.19 800 832 912 1024 600 601 604 623
  Modeline 	"768x576" 43.52 768 800 880 992 576 577 580 601
  Modeline 	"768x576" 37.37 768 800 880 992 576 577 580 598
  Modeline 	"640x480" 29.84 640 664 728 816 480 481 484 501
  Modeline 	"640x480" 25.10 640 656 720 800 480 481 484 498
EndSection

Section "Screen"
  DefaultDepth 24
  SubSection "Display"
    Depth      15
    Modes      "1280x1024" "1280x960" "1280x800" "1152x864" "1280x768" "1024x768" "800x600" "768x576" "640x480" 
  EndSubSection
  SubSection "Display"
    Depth      16
    Modes      "1280x1024" "1280x960" "1280x800" "1152x864" "1280x768" "1024x768" "800x600" "768x576" "640x480" 
  EndSubSection
  SubSection "Display"
    Depth      24
    Modes      "1280x1024" "1280x960" "1280x800" "1152x864" "1280x768" "1024x768" "800x600" "768x576" "640x480" 
  EndSubSection
  SubSection "Display"
    Depth      32
    Modes      "1280x1024" "1280x960" "1280x800" "1152x864" "1280x768" "1024x768" "800x600" "768x576" "640x480" 
  EndSubSection
  SubSection "Display"
    Depth      8
    Modes      "1280x1024" "1280x960" "1280x800" "1152x864" "1280x768" "1024x768" "800x600" "768x576" "640x480" 
  EndSubSection
  Device       "Device[0]"
  Identifier   "Screen[0]"
  Monitor      "Monitor[0]"
EndSection

Section "Device"
  BoardName    "RV280 5960"
  BusID        "1:0:0"
  Driver       "radeon"
  Identifier   "Device[0]"
  Screen       0
  VendorName   "ATI"
EndSection

You could probably put the 1280x1024 lines in your config file and restart x.

Note that this drives it at 60hz not 75hz, i've not figured out how to do 75hz, but the manual says 60hz is optimum mode.

coolnicklas · 12-02-2005, 03:55 AM

Thanks for help

I have tried a lot of things now and i seriosly suspect that my video (trident) chipset is FUBAR.

First of all i connected the 970p to the VGA port of my IBM thinkpad (Radeon 7000 mobile chipset)
and that worked great, with 1024x768@60 Hz.

Then I uninstalled XFree86 and updated to Xorg and tried various settings (resolutions frequenzes, depths),
all according to the 970p manual. No luck. It all ended up in an error message on the monitor about invalid settings
even before X started making it impossible watch BIOS settings, GRUB etc.

I then took the computer to my work and plugged it in to a 21 '' CRT, and now it is possible to get output on the screen prior to
xserver is started.

My friend has an identical computer running Redhat 7.x and he is able to get ouput at 1280x1024@60Hz on his 19'' Viewsonic LCD.
I will bring my computer to him after work today and swap hard discs. That would clearly indicate wheter this is a software or hardware
related problem.

If it's a software problem I will wipe my hdd and reinstall Debian or Fedora since I am out of possible solutions.

/Nicklas