[PATCH v4 5/6] Documentation/admin-guide: Document nomodeset kernel parameter

[Javier Martinez Canillas <javierm@redhat.com>]

The nomodeset kernel command line parameter is not documented. Its name
is quite vague and is not intuitive what's the behaviour when it is set.

Document in kernel-parameters.txt what actually happens when nomodeset
is used. That way, users could know if they want to enable this option.

Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
---

Changes in v4:
- Don't mention the simpledrm driver and instead explain in high level
  terms what the nomodeset option is about.

 Documentation/admin-guide/kernel-parameters.txt | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git Documentation/admin-guide/kernel-parameters.txt Documentation/admin-guide/kernel-parameters.txt
index 91ba391f9b32..f6434aff943d 100644
--- Documentation/admin-guide/kernel-parameters.txt
+++ Documentation/admin-guide/kernel-parameters.txt
@@ -3521,6 +3521,13 @@
 			shutdown the other cpus.  Instead use the REBOOT_VECTOR
 			irq.
 
+	nomodeset	Disable kernel modesetting. DRM drivers will not perform
+			display-mode changes or accelerated rendering. Only the
+			system framebuffer will be available for use if this was
+			set-up by the firmware or boot loader.
+
+			Useful as fallback, or for testing and debugging.
+
 	nomodule	Disable module load
 
 	nopat		[X86] Disable PAT (page attribute table extension of
-- 
2.33.1