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-rw-r--r--src/radeon_driver.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/src/radeon_driver.c b/src/radeon_driver.c
index 532a857e..3fa10c5a 100644
--- a/src/radeon_driver.c
+++ b/src/radeon_driver.c
@@ -1108,9 +1108,12 @@ static void RADEONGetClockInfo(ScrnInfoPtr pScrn)
if (info->ChipFamily == CHIP_FAMILY_RV100 && !info->HasCRTC2) {
/* Avoid RN50 corruption due to memory bandwidth starvation.
* 18 is an empirical value based on the databook and Windows driver.
- */
+ *
+ * Empirical value changed to 24 to raise pixel clock limit and
+ * allow higher resolution modes on capable monitors.
+ */
pll->max_pll_freq = min(pll->max_pll_freq,
- 18 * info->mclk * 100 / pScrn->bitsPerPixel *
+ 24 * info->mclk * 100 / pScrn->bitsPerPixel *
info->RamWidth / 16);
}