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authorLeah Rowe <leah@libreboot.org>2025-04-21 02:22:40 +0100
committerLeah Rowe <leah@libreboot.org>2025-04-21 03:26:54 +0100
commit762c7ff43ebd065de62f26fbe5729d221110c5a0 (patch)
treee61a91b987761e52cca04f3a2b6dc0d0c26c2d47 /config/coreboot/default/patches/0012-dell-optiplex_9020-Disable-IOMMU-by-default.patch
parent86e7aa80c51979767208b858dac5f38d7e83914e (diff)
coreboot/default: Update, c247f62749b (8 Feb 2025)
This is currently the latest revision of coreboot. Other coreboot trees to follow. The "next" tree will also be merged with coreboot/default, in a follow-up commit. Signed-off-by: Leah Rowe <leah@libreboot.org>
Diffstat (limited to 'config/coreboot/default/patches/0012-dell-optiplex_9020-Disable-IOMMU-by-default.patch')
-rw-r--r--config/coreboot/default/patches/0012-dell-optiplex_9020-Disable-IOMMU-by-default.patch29
1 files changed, 29 insertions, 0 deletions
diff --git a/config/coreboot/default/patches/0012-dell-optiplex_9020-Disable-IOMMU-by-default.patch b/config/coreboot/default/patches/0012-dell-optiplex_9020-Disable-IOMMU-by-default.patch
new file mode 100644
index 00000000..06316010
--- /dev/null
+++ b/config/coreboot/default/patches/0012-dell-optiplex_9020-Disable-IOMMU-by-default.patch
@@ -0,0 +1,29 @@
+From bcb2017f4c583742bc60179e6f7c7381e1fa0a39 Mon Sep 17 00:00:00 2001
+From: Leah Rowe <info@minifree.org>
+Date: Sat, 2 Mar 2024 23:00:09 +0000
+Subject: [PATCH 12/24] 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
+--
+2.39.5
+