I am a newbie of Linux. I just finished to install RedHat Linux9 at Compaq Prolint 1600. The problem now is the screen can not display. I have tried the following method 1)Boot with boot disk 2)using command linux 3 to start 3)issue command to lanch X configuration Tool "redhat-config-xfree86" 4)the GUI display, and i go to "Advanced" Tab to click the "config" button to change the monitor. however, I go back to text mode suddenly. Question: 1)Why the screen go back to text mode suddenly? 2)Can I config the monitor in GUI ? 3)if not, what command do i need to issue to config the monitor horizontal/vertical frequency in text mode? Thank you for answering me

You can edit /etc/X11/XF86Config(-4) and change the horizontal/vertical frequency there in text mode. If you are unfamiliar with a *nix editor (eg vi or emacs) I suggest you try mcedit which is easy to use and a little like dos edit.

Thanks 3Dave My monitor is sumuang and i foung there following from samuang website. However, I do not know which value is the one i should look for. Please kindly comment. ----- Monitor: Samsung SyncMaster 510s / 550s MagicSyncMaster CDP15(M)S /CDP1530(M)S /CDP5000S /CDP5050V ----- ModeLine "640x480" 25.175 640 656 752 800 480 490 492 525 -hsync -vsync ModeLine "640x480" 31.5 640 656 720 840 480 481 484 500 -hsync -vsync ModeLine "640x480" 36 640 696 752 832 480 481 484 509 -hsync -vsync ModeLine "800x600" 40 800 840 968 1056 600 601 605 628 +hsync +vsync ModeLine "800x600" 49.5 800 816 896 1056 600 601 604 625 +hsync +vsync ModeLine "800x600" 56.25 800 832 896 1048 600 601 604 631 +hsync +vsync ModeLine "1024x768" 65 1024 1048 1184 1344 768 771 777 806 -hsync -vsync ModeLine "1024x768" 78.75 1024 1040 1136 1312 768 769 772 800 +hsync +vsync One more question, if i change the monitor also not list in the redhat monitor list. How can i solve this problem ? Thank you for answering me

Which model do you have? CDP1530(M)S, CDP5000S or CDP5050V? You also want the entries like: HorizSync 30.0-85.0 VertRefresh 50.0-120.0 Note: those figures are for my monitor...not yours.

I know my monitor is: Monitor: Samsung SyncMaster 550s ModeLine "640x480" 25.175 640 656 752 800 480 490 492 525 -hsync -vsync ModeLine "640x480" 31.5 640 656 720 840 480 481 484 500 -hsync -vsync ModeLine "640x480" 36 640 696 752 832 480 481 484 509 -hsync -vsync ModeLine "800x600" 40 800 840 968 1056 600 601 605 628 +hsync +vsync ModeLine "800x600" 49.5 800 816 896 1056 600 601 604 625 +hsync +vsync ModeLine "800x600" 56.25 800 832 896 1048 600 601 604 631 +hsync +vsync ModeLine "1024x768" 65 1024 1048 1184 1344 768 771 777 806 -hsync -vsync ModeLine "1024x768" 78.75 1024 1040 1136 1312 768 769 772 800 +hsync +vsync The above config setting was found on Sumsung website. How can I make use for this file? Thank you for replying me