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-rw-r--r--src/radeon_atombios.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/src/radeon_atombios.c b/src/radeon_atombios.c
index a8eded66..1f4b9dcd 100644
--- a/src/radeon_atombios.c
+++ b/src/radeon_atombios.c
@@ -2171,6 +2171,15 @@ RADEONGetATOMClockInfo(ScrnInfoPtr pScrn)
if (pll->pll_out_min == 0)
pll->pll_out_min = 64800;
+ /* limiting the range is a good thing in most cases
+ * as it limits the number of matching pll combinations,
+ * however, some duallink DVI monitors seem to prefer combinations that
+ * would be limited by this. This may need to be revisited
+ * per chip family.
+ */
+ if (pll->pll_out_min > 64800)
+ pll->pll_out_min = 64800;
+
return TRUE;
}