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| t | | t | Grub2 ubuntu add kernel parameters that survive updates |
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| | | If your Ubuntu Kernel is updated your kernel parameters will be lost. In my cas |
| | | e one of my IBM systems will not boot unless *iommu=soft* exists as a kernel boo |
| | | t parameter. To make this change survive after kernel updates do the following. |
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| | | edit **/etc/default/grub** and add the entry to **GRUB_CMDLINE_LINUX_DEFAULT**: |
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| | | .. code-block:: grub |
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| | | GRUB_CMDLINE_LINUX_DEFAULT="quiet splash iommu=soft" |
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