Bug#820571: nvidia-driver: shutdown hangs after installing nvidia-drivers

[Luca Boccassi]

On Sun, 2016-04-10 at 17:41 +0100, Luca Boccassi wrote:
> Control: forwarded -1 https://devtalk.nvidia.com/default/topic/852598/34x-35x-freeze-at-reboot-shutdown-rcu_sched-self-detected-stall-detected/
> Control: tags -1 upstream
> 
> On Sun, 2016-04-10 at 11:15 -0500, Ignacio Vargas Cordero wrote:
> > Hello Luca,
> > 
> > 
> > I tried editing the GRUB config as you suggested - and it worked!
> > Shutdown times are back to normal
> > 
> > I still have a slight problem though: now when booting, I get this
> > message after selecting Debian on GRUB:
> > error: file '/boot/grub/x86_64-efi/vbe.mod' not found.
> > Loading Linux 4.4.0-1-amd64 . . .
> > Loading initial ramdisk . . .
> > 
> > Press any key to continue . . .
> > 
> > error: no suitable video mode found.
> > Booting in blind mode
> > _ 
> > As you can see, just pressing a key gets rid of the message and boots
> > me to the desktop normally - but I'd like to be able to get rid of it.
> > 
> > 
> > How may I go about adding vbe.mod to my GRUB modules? I didn't find
> > the file anywhere on my system
> > 
> > 
> > Thank you so much for your help, regards
> 
> Hi,
> 
> [please keep the bug CC'ed when replying]
> 
> Sorry but I do not use EFI on my desktop so I can't reproduce that
> issue, I use legacy GRUB, and that file can be found
> at: /boot/grub/i386-pc/vbe.mod
> 
> I understand that having the boot halted until a key is pressed is very
> annoying. Have you tried taking out that new config from GRUB, and
> instead disabling the integrated Intel card in the BIOS (if you don't
> need it and if the BIOS allows it of course)?

So vbe.mod is only available in the legacy GRUB [1]. But the alternative
all_video is available in the EFI too [2]. I just tried and it works, so
you could give that a shot. Take out the "vbe" line you added, and
instead use:

GRUB_VIDEO_BACKEND="all_video"

and then run "sudo update-grub".

Anyway, I strongly suspect that the important part is disabling modeset
in the kernel command line (or turning off the integrated card). The
rest is to get working TTYs.

Kind regards,
Luca Boccassi

[1] https://packages.debian.org/search?suite=sid&section=all&arch=any&searchon=contents&keywords=vbe.mod
[2] https://packages.debian.org/search?suite=sid&section=all&arch=any&searchon=contents&keywords=all_video.mod
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