[mythtv-users] Trouble booting a system with S-video plugged in
larryt at gmail.com
Tue Jun 14 02:53:05 UTC 2005
The machine does in fact seem to be hanging. In the IRC channel, I was
advised to look for a framebuffer in the kernel but could not find one. I am
using a 16k stack kernel provided by linuxant because my next task is to set
up wireless pci.
If I boot with VGA only connected, it goes in fine and I can startx and
have it go to whichever display I configure in xorg.conf. I can plug in
S-video once it is finished booting and has a login prompt and use that
display for X if I desire.
If I have only S-video connected, it hangs though I still have keyboard
responsiveness in that the lights will turn on + off and I can get a
response out of control alt del. I cannot access the machine remotely
either. It displays the BIOS information. It checks for boot devices then
informs me it is switching to GRUB level 2 and then I get a black screen
with a signal. The hard drive light remains on for a few seconds then shuts
off and doesn't come back on. It leads me to believe it is hanging at this
point. If I plug in the VGA at this point, I get no display.
If I boot with VGA + S-video both connected, it goes in fine and I can
startx and have it go to whichever display I configure in xorg.conf.
If I have nothing connected, it boots fine and I can access it remotely.
However, plugging in either VGA or S-video cable yields me no signal.
So, in summary, I have a decent workaround to get my S-Video working: I
need to have a VGA cord connected to boot the computer then I can remove the
VGA cord once X is loaded and hope to not need to reboot again. If I exit
out of X at this point, the TV display seems to be not synced but it does
show what is on the command line scrolling horizontally on the screen at a
Unfortunately, I see no option to configure my video card in the BIOS
because it is a separate card.
Thanks for any suggestions.
On 6/12/05, Nick <knowledgejunkie at gmail.com> wrote:
> On 6/12/05, Larry Taub <larryt at gmail.com> wrote:
> > When I boot with S-Video plugged in, the BIOS shows up fine and the tv
> > displays that the grub bootloader stage 2 is beginning and then it never
> > continues. If I plug in a VGA monitor or nothing, it boots fine and when
> > gets to the X login screen, I can hook in my S-Video cable and see
> > everything just fine and it works fine on the tv after this point.
> When you only have S-Video plugged in, is the machine actually
> hanging, or is there just no output on the TV? Depending on X, it may
> be looking for a VGA monitor to be present to successfully launch the
> X server. If this is the case, it is usually possible to edit the
> xorg.conf file to tell X that you are using on S-Video output.
> Alternatively, if you are using a clone mode, then it is likely it
> will try and detect the presence of the VGA card first (which may
> explain why it works and you get cloned displays with both VGA and
> S-Video connected)
> > Obviously, I don't intend on rebooting this machine often but it would
> > nice to figure out what is causing this problem and perhaps fix it
> > especially since my backend/frontend machine boots fine with just the
> > S-Video cable (on the same TV and S-Video cable right now).
> On my Pundit-R (ATI based) machine, I use only S-Video output
> connected to the TV. I changed the BIOS to reflect this, and also
> edited my xorg.conf file to tell it I am using only display via
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