[bug #42051] Grub2-EFI needs to enable GOP to boot on Toshiba w/7670m

[Nicolas]

URL:
  <http://savannah.gnu.org/bugs/?42051>

                 Summary: Grub2-EFI needs to enable GOP to boot on Toshiba
w/7670m
                 Project: GNU GRUB
            Submitted by: snakehaveyou
            Submitted on: vie 04 abr 2014 17:08:28 GMT
                Category: Booting
                Severity: Major
                Priority: 5 - Normal
              Item Group: Action Request
                  Status: None
                 Privacy: Public
             Assigned to: None
         Originator Name: SnakeHaveYou
        Originator Email: address@hidden
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 
                 Release: 2.00
         Reproducibility: Every Time
         Planned Release: None

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Details:

Here's the problem:

When you try to boot OpenSUSE 13.1/Fedora 20(non tested with other distros) in
UEFI mode, the UI and terminal screen will be shifted and corrupted with
artifacts, or flashing.

Here are some pics of the shifted screen:

http://s1203.photobucket.com/user/SnakeHaveYou/media/20140322_010242_Night.jpg.html

http://s1203.photobucket.com/user/SnakeHaveYou/media/20140322_010401_Night.jpg.html



And here's a video of the flashing screen (only with Kernel 3.14):

https://www.youtube.com/watch?v=ogcsVK-6q6c



How to reproduce?:

Configuration 1:

- Kernel: 3.14
- Video driver: Open Source Radeon driver
- Bootloader: Grub2-EFI
- Issue: Flashing screen (even on console). Vertical lines. No mouse.
- Workaround: None

Configuration 2:

- Kernel: 3.11 to 3.13
- Video driver: Proprietary Catalyst. Latest beta
- Bootloader: Grub2-EFI
- Issue: Shifted screen. Vertical lines. Mouse on screen (pointer with
artifacts)
- Workaround: Suspend and wake up system fix the issue. Will appear again
after a restart.




When i can't reproduce it?:


Configuration 3:

- Kernel: 3.11 to 3.13
- Video driver: Open Source Radeon
- Bootloader: Grub2-EFI
- Issue: None

Configuration 4:

- Kernel: 3.11 to 3.13
- Video driver: Proprietary and Open Source
- Bootloader: rEFInd ONLY with GOP enabled
- Issue: None

Configuration 5:

- Kernel: 3.14
- Video driver: Open Source Radeon
- Bootloader: rEFInd ONLY with GOP enabled
- Issue: None

Configuration 6:

- With a non-EFI installation, i can;t reproduce the issue




My workaround is:

Install rEFInd and enable GOP mode in refind.conf. This is the only way i
found to fix the issue..

Seems to be that there are some incompatibilities between the 7670m and/or
Toshiba laptops with Grub2-EFI video modes.






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