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Add intel_iommu=igfx_off to T440p Coreboot kernel parameters

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Without this, neither Qubes OS nor the Qubes OS installer would start.
Presumably, because we're "kexecing" from an already running kernel, we
need this set at the Coreboot level? Testing revealed that including
`intel_iommu=igfx_off` in the `CONFIG_BOOT_KERNEL_ADD` board config
option did nothing. And, the Qubes OS default boot option already
contains `intel_iommu=igfx_off`.

See:
- https://www.qubes-os.org/doc/installation-troubleshooting/#not-asking-for-vnc-because-we-dont-have-a-network--x-startup-failed-aborting-installation--pane-is-dead-error-during-installation
- https://github.com/Qubes-Community/Contents/blob/master/docs/troubleshooting/intel-igfx-troubleshooting.md
- https://www.kernel.org/doc/html/v5.10/x86/intel-iommu.html?highlight=igfx_off#graphics-problems
This commit is contained in:
Rocky Breslow 2023-01-15 18:51:27 -05:00
parent 65be2c5b7a
commit 24d23ff47c
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1 changed files with 1 additions and 0 deletions
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config/coreboot-t440p.config
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@ -7,6 +7,7 @@ CONFIG_ME_BIN_PATH="@BLOB_DIR@/t440p/me.bin"
CONFIG_GBE_BIN_PATH="@BLOB_DIR@/t440p/gbe.bin"
CONFIG_HAVE_IFD_BIN=y
CONFIG_BOARD_LENOVO_THINKPAD_T440P=y
CONFIG_LINUX_COMMAND_LINE="intel_iommu=igfx_off"
CONFIG_TPM_MEASURED_BOOT=y
CONFIG_HAVE_MRC=y
CONFIG_MRC_FILE="@BLOB_DIR@/haswell/mrc.bin"