Toshiba Grub Screen Black

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sphinxmoro

Toshiba Grub Screen Black

Post by sphinxmoro »

Hello,
I have a TOSHIBA Satellite P770-116 with Windows 7
I have installed mint 17 cinnamon 32 bits on an internal disk sda1
I have installed mint after Windows

Grub2 is also installed
Options are to boot on windows by default.

I don't succeed to see the GRUB MENU on the screen at boot time, everything is black
I must select by the arrow the second choice (mint) after a certain time and two disk access to boot mint in a blind way.
I have tried various configuration with grub-customizer, but my screen
is allways black.

This situation prevents to type SHIFT to see the menus....
I don't succeed either to type F12 to choose the disk for rebooting for example a rescue disk.

Can you help?
Thanks
Last edited by LockBot on Wed Dec 28, 2022 7:16 am, edited 1 time in total.
Reason: Topic automatically closed 6 months after creation. New replies are no longer allowed.
kukamuumuka

Re: Toshiba Grub Screen Black

Post by kukamuumuka »

Remove # from the beginning of the next line about /etc/default/grub file and update-grub after editing.

Code: Select all

GRUB_GFXMODE=640x480

Code: Select all

sudo update-grub
sphinxmoro

Re: Toshiba Grub Screen Black

Post by sphinxmoro »

Hello,
Thanks for your iput
Unfortunatlly, this does not work
Thank you
kukamuumuka

Re: Toshiba Grub Screen Black

Post by kukamuumuka »

One choice is to install Legacy Grub, but the you need to add windows by hand to the /boot/grub/menu.lst file. An example about installation.

Code: Select all

sudo apt-get install grub
sudo update-grub ## answer Y when asking about menu.lst
sudo grub-install /dev/sda  ## I suppose that hard drive is sda
sudo nano /boot /grub/menu.lst
... no you have to add windows to the list and uncomment/remove hidden timeout entry
An example about windows entry for /dev/sda1

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title Windows disk1/partition1                                  
rootnoverify (hd0,0)
chainloader +1
boot
You can also use VGA codes on the kernel line

Code: Select all

 VGA Resolution Codes for GRUB & Lilo
--- Depth --
Colors  bits  640x480  800×600  1024×768  1152×864 1280×1024  1600×1200
   256    8   vga=769  vga=771   vga=773   vga=353   vga=775    vga=796
 32000    ?   vga=784  vga=787   vga=790   vga= ?    vga=793    vga= ? 
 65000   16   vga=785  vga=788   vga=791   vga=355   vga=794    vga=798
 16.7M   24   vga=786  vga=789   vga=792   vga=795   vga=799
sphinxmoro

Re: Toshiba Grub Screen Black

Post by sphinxmoro »

Hello,
I have found my probem.
I have a screen connected with an HDMI cable.
When I put the screen on or off with the cable, my boot screen is black.
When I REMOVE the cable (unplug), I have a normal boot screen.
Is there something to do to keep the cable ?
Thanks
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JOPETA
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Re: Toshiba Grub Screen Black

Post by JOPETA »

When you log-in, connect the external display. Then, you have to define the roll of both displays ( Menú>Preferences>Display), set fixed one (laptop) as primary by clicking the upper switch and check mirrowing if you want.

In other hand, there is a funtion key (in the upper row of the keyboard to use with Fn key) you can press to alternate or keep both enables and must works on booting.
Ni cola de león ni cabeza de ratón, prefiero ser diente de ajo.(Javier Krahe)
kukamuumuka

Re: Toshiba Grub Screen Black

Post by kukamuumuka »

sphinxmoro wrote:Hello,
I have found my probem.
I have a screen connected with an HDMI cable.
When I put the screen on or off with the cable, my boot screen is black.
When I REMOVE the cable (unplug), I have a normal boot screen.
Is there something to do to keep the cable ?
Thanks
One choice is to set the primary output.
http://puolanka.info/distrowatch/how-to ... y-monitor/
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JOPETA
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Re: Toshiba Grub Screen Black

Post by JOPETA »

¿Isn't it the same thing but in codes? Please, put in clear for me (i´m so noob).
Ni cola de león ni cabeza de ratón, prefiero ser diente de ajo.(Javier Krahe)
kukamuumuka

Re: Toshiba Grub Screen Black

Post by kukamuumuka »

JOPETA wrote:¿Isn't it the same thing but in codes? Please, put in clear for me (i´m so noob).
Not exactly, with the startup script, you do not need to push Fn button. .. :lol:
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JOPETA
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Re: Toshiba Grub Screen Black

Post by JOPETA »

So you have 2 or 3 seconds to scratch your nose or take a sip. OK. :lol:
Ni cola de león ni cabeza de ratón, prefiero ser diente de ajo.(Javier Krahe)
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