From b243452bf1ed7c9aee1e6685091e98f52d7229c7 Mon Sep 17 00:00:00 2001
From: Leah Rowe <info@minifree.org>
Date: Sat, 2 Mar 2024 23:00:09 +0000
Subject: [PATCH 12/40] 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 8000eea8c0..0700f971ee 100644
--- a/src/mainboard/dell/optiplex_9020/cmos.default
+++ b/src/mainboard/dell/optiplex_9020/cmos.default
@@ -4,4 +4,4 @@ debug_level=Debug
 nmi=Disable
 power_on_after_fail=Disable
 fan_full_speed=Disable
-iommu=Enable
+iommu=Disable
-- 
2.47.3

