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From 153ca1a43c2c978fa2b2b82d988b0f838953cfb9 Mon Sep 17 00:00:00 2001
From: Leah Rowe <info@minifree.org>
Date: Sat, 2 Mar 2024 23:00:09 +0000
Subject: [PATCH 2/4] dell/optiplex_9020: Disable IOMMU by default
Needed to make graphics cards work. Turning it on is
recommended if only using iGPU, otherwise leave it off
by default. The IOMMU is extremely buggy when a graphics
card is used. Leaving it off by default will ensure that
the default ROM images in Libreboot will work on any setup.
Signed-off-by: Leah Rowe <info@minifree.org>
---
src/mainboard/dell/optiplex_9020/cmos.default | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/src/mainboard/dell/optiplex_9020/cmos.default b/src/mainboard/dell/optiplex_9020/cmos.default
index c974022472..a0acd7b6bb 100644
--- a/src/mainboard/dell/optiplex_9020/cmos.default
+++ b/src/mainboard/dell/optiplex_9020/cmos.default
@@ -3,4 +3,4 @@ boot_option=Fallback
debug_level=Debug
nmi=Disable
power_on_after_fail=Disable
-iommu=Enable
+iommu=Disable
--
2.39.2
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