Not sure how to explain this. Running Mandrake 9.2 Everything with the X system has been fine for long time. Bought a new UPS box. After installing new UPS box, the screen flickers badly in Linux but not in W98. Called Viewsonic and they tried to help but finally said it had to the setting in Linux. Called Belkin (UPS manufacturer), same thing as Viewsonic. I've tried to correct problem in Drake Contol Center by changing both horizontal and vertical rates to all that is listed. The Viewsonic menu has FH of 81.6 and VH of 65.3. Went into xf86config and changed the setting directly. The problem still exists and Linux is unualble due to this. Any help appreciated. TIA Don --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.560 / Virus Database: 352 - Release Date: 1/8/04 _______________________________________________ XFree86 mailing list XFree86@xxxxxxxxxxx http://XFree86.Org/mailman/listinfo/xfree86