Re: [PATCH v3 5/6] Documentation/admin-guide: Document nomodeset kernel parameter

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Hi

Am 08.11.21 um 13:15 schrieb Javier Martinez Canillas:
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@xxxxxxxxxx>
---

(no changes since v1)

  Documentation/admin-guide/kernel-parameters.txt | 4 ++++
  1 file changed, 4 insertions(+)

diff --git Documentation/admin-guide/kernel-parameters.txt Documentation/admin-guide/kernel-parameters.txt
index 91ba391f9b32..ed9859fd0734 100644
--- Documentation/admin-guide/kernel-parameters.txt
+++ Documentation/admin-guide/kernel-parameters.txt
@@ -3521,6 +3521,10 @@
  			shutdown the other cpus.  Instead use the REBOOT_VECTOR
  			irq.
+ nomodeset Disable kernel modesetting. DRM drivers will not be
+			loaded when this kernel boot parameter is used. The
+			simpledrm driver is the only DRM driver that loads.
+

That's misleading and to the general admin it might not be clear what simpledrm is about. Rather say something like

 Disable kernel modesetting. DRM drivers will not perform
 display-mode changes or accelerated rendering. Only the
 system framebuffer will be available for use. Requires the
 firmware or boot loader to setup the display. Useful as
 fallback, or for testing and debugging.

Best regards
Thomas

  	nomodule	Disable module load
nopat [X86] Disable PAT (page attribute table extension of


--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Ivo Totev

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