From 61041d49b94236400e836b8ea518d3a064b95c4e Mon Sep 17 00:00:00 2001
From: Leah Rowe <info@minifree.org>
Date: Sat, 2 Mar 2024 23:00:09 +0000
Subject: [PATCH 2/2] 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 8253570f19..7bccc80e51 100644
--- a/src/mainboard/dell/optiplex_9020/cmos.default
+++ b/src/mainboard/dell/optiplex_9020/cmos.default
@@ -2,4 +2,4 @@ boot_option=Fallback
 debug_level=Debug
 nmi=Disable
 power_on_after_fail=Disable
-iommu=Enable
+iommu=Disable
-- 
2.39.2

