[bug #47894] Support for NVIDIA scaling mode (bug includes PoC)

[Maxxim]

URL:
  <http://savannah.gnu.org/bugs/?47894>

                 Summary: Support for NVIDIA scaling mode (bug includes PoC)
                 Project: GNU GRUB
            Submitted by: maxxim
            Submitted on: Wed 11 May 2016 06:53:40 AM GMT
                Category: User Interface
                Severity: Major
                Priority: 5 - Normal
              Item Group: Feature Request
                  Status: None
                 Privacy: Public
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 
                 Release: Git master
         Reproducibility: None
         Planned Release: None

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Details:

Most NVIDIA graphics adapters start with screen scaling enabled by default,
resulting in a thick black border around the Grub menu and distorted/unclear
fonts.

Screen scaling can easily be modified by Grub. I attached a patch for the VBE
module which adds support for it. I also attached before/after screenshots.
Successfully tested with NVIDIA GeForce GTX 650 Ti.

My patch is based on the Linux kernel patch for the uvesafb driver:
https://lkml.org/lkml/2015/5/17/17

If you decide to integrate this feature, I suggest doing that by introducing a
user-configurable variable for grub.cfg that allows to set the scaling mode to
all known values (e.g. set nvidia_scaling=1). By default, I suggest Grub
doesn't modify scaling at all unless the user specifically requests it.




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File Attachments:


-------------------------------------------------------
Date: Wed 11 May 2016 06:53:40 AM GMT  Name: nvidia-scaling.patch  Size: 1kB  
By: maxxim

<http://savannah.gnu.org/bugs/download.php?file_id=37126>
-------------------------------------------------------
Date: Wed 11 May 2016 06:53:40 AM GMT  Name: before.jpg  Size: 662kB   By:
maxxim

<http://savannah.gnu.org/bugs/download.php?file_id=37127>
-------------------------------------------------------
Date: Wed 11 May 2016 06:53:40 AM GMT  Name: after.jpg  Size: 695kB   By:
maxxim

<http://savannah.gnu.org/bugs/download.php?file_id=37128>

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