On Mon, Oct 22, 2012 at 9:46 AM, Tim <ignored_mailbox@yahoo.com.au> wrote:
On Mon, 2012-10-22 at 00:02 +0200, Alain Roger wrote:
> i've just downloaded F17 and i tried to install it on my computer x86
> having a nVidia 8800 GT video card. after seeing only the logo at boot
> process, now everything i can see is a black screen :( and the Led of
> my monitor is blinking so it means no video signal. is there any
> compatibility issue with f17 and nvidia 8800 ? thank

Sounds awfully like what I've had to deal with:  GRUB running at the
highest resolution that the graphics card could generate, regardless of
whether the scan/refresh rates were compatible with my monitor (which it
wasn't).

I don't know how you can fix that if you can't, at some stage, get to
see a display.  I was lucky enough that once GRUB had finally booted up
an OS, the OS did run at a suitable rate, and I could edit the
configuration to change GRUB's resolution.

In the /etc/default/grub file, I added this line:

  GRUB_GFXMODE=800x600

Then ran the "grub2-mkconfig" command to regenerate the config file used
at boot time.

If it's X, itself, running at the wrong resolution, after GRUB has
handed over, and if Xorg hadn't been crippled, years ago, you could have
pressed CTRL ALT + or - to change resolutions on the fly, until
something worked.

--
[tim@localhost ~]$ uname -rsvp
Linux 3.6.2-4.fc17.x86_64 #1 SMP Wed Oct 17 02:43:21 UTC 2012 x86_64

All mail to my mailbox is automatically deleted, there is no point
trying to privately email me, I will only read messages posted to the
public lists.


Hi Tim,

in fact this problem occurs with Fedora 17, Ubuntu 12.x but not with Mandriva 2011...strange isn't it ? 
so today i can install F17 as i wanted on this computer and i must stay with this horrible Win7...
previously it was possible to boot on Fedora, ubuntu and later on change screen resolution, but now it is automatically detected and X use it :(

A.