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diff -up xf86-video-ati-6.12.2/src/drmmode_display.c.lvds xf86-video-ati-6.12.2/src/drmmode_display.c
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--- xf86-video-ati-6.12.2/src/drmmode_display.c.lvds 2009-05-07 13:13:43.000000000 -0400
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+++ xf86-video-ati-6.12.2/src/drmmode_display.c 2009-05-07 13:39:10.000000000 -0400
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@@ -568,6 +568,49 @@ drmmode_output_get_modes(xf86OutputPtr o
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Modes = xf86ModesAdd(Modes, Mode);
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}
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+
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+ /*
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+ * LVDS can scale. If there's no EDID, or if it claims not to be
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+ * continuous-freq, then add the default modes so we get 800x600
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+ * and friends.
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+ */
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+ if (strstr(output->name, "LVDS")) {
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+ xf86MonPtr mon = output->MonInfo;
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+ if (!mon || !GTF_SUPPORTED(mon->features.msc)) {
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+ DisplayModePtr m, i, p = NULL;
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+ int max_x = 0, max_y = 0;
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+ float max_vrefresh = 0.0;
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+
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+ for (m = Modes; m; m = m->next) {
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+ if (m->type & M_T_PREFERRED)
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+ p = m;
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+ max_x = max(max_x, m->HDisplay);
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+ max_y = max(max_y, m->VDisplay);
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+ max_vrefresh = max(max_vrefresh,
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+ xf86ModeVRefresh(m));
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+ }
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+
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+ max_vrefresh = max(max_vrefresh, 60.0);
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+ max_vrefresh *= (1 + SYNC_TOLERANCE);
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+
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+ m = xf86GetDefaultModes(FALSE, FALSE);
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+
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+ xf86ValidateModesSize(output->scrn, m, max_x, max_y, 0);
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+ for (i = m; i; i = i->next) {
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+ if (xf86ModeVRefresh(i) > max_vrefresh)
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+ i->status = MODE_VSYNC;
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+ if (p && i->HDisplay >= p->HDisplay &&
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+ i->VDisplay >= p->VDisplay &&
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+ xf86ModeVRefresh(i) >= xf86ModeVRefresh(p))
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+ i->status = MODE_VSYNC;
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+ }
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+
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+ xf86PruneInvalidModes(output->scrn, &m, FALSE);
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+
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+ Modes = xf86ModesAdd(Modes, m);
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+ }
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+ }
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+
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return Modes;
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}
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