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Diffstat (limited to 'doc/source/admin/interfaces/boot.rst')
| -rw-r--r-- | doc/source/admin/interfaces/boot.rst | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/doc/source/admin/interfaces/boot.rst b/doc/source/admin/interfaces/boot.rst index b9f0bda3e..a4b4cf2a3 100644 --- a/doc/source/admin/interfaces/boot.rst +++ b/doc/source/admin/interfaces/boot.rst @@ -49,7 +49,7 @@ configuration option: .. code-block:: ini [pxe] - kernel_append_params = nofb nomodeset vga=normal + kernel_append_params = nofb vga=normal .. note:: The option was called ``pxe_append_params`` before the Xena cycle. @@ -59,9 +59,9 @@ Per-node and per-instance overrides are also possible, for example: .. code-block:: bash baremetal node set node-0 \ - --driver-info kernel_append_params="nofb nomodeset vga=normal" + --driver-info kernel_append_params="nofb vga=normal" baremetal node set node-0 \ - --instance-info kernel_append_params="nofb nomodeset vga=normal" + --instance-info kernel_append_params="nofb vga=normal" Starting with the Zed cycle, you can combine the parameters from the configuration and from the node using the special ``%default%`` syntax: @@ -74,13 +74,21 @@ configuration and from the node using the special ``%default%`` syntax: Together with the configuration above, the following parameters will be appended to the kernel command line:: - nofb nomodeset vga=normal console=ttyS0,115200n8 + nofb vga=normal console=ttyS0,115200n8 .. note:: Ironic does not do any de-duplication of the resulting kernel parameters. Both kernel itself and dracut seem to give priority to the last instance of the same parameter. +.. warning:: + Previously our documentation listed the Linux kernel parameter + ``nomodeset`` as an option. This option is intended for troubleshooting, + and can greatly degrade performance with Matrox/Aspeed BMC Graphics + controllers which is very commonly used on physical servers. The + performance degredation can greatly reduce IO capacity upon every + console graphics update being written to the screen. + Common options -------------- |