Power Mac G5 (Early 2005) Black Screen

[Trzone]

I have browsed the forums quite a bit and have tried adding several options to yaboot.conf, running ybin -v afterwards

I can ssh into the Power Mac G5 (Early 2005) Specs below
https://en.wikipedia.org/wiki/Power_...vision_history

The graphics card: NVIDIA GeForce 6800 Ultra DDL

Before I installed the latest updates, I was able to boot up into a low bit display "quiet splash video=ofonly nouveau.modeset=0"

Now there's a brief flash of color and then it goes black.
Any suggestions?

[tiresia]

Does your Card have two DVI connections? Did you try to switch to the second one?

[Trzone]

I do have two dvi connectors, the one on the left works but the right one (haven't used before) only works up until yaboot.

There does not seem to be much information on the nvidia card but I am going to try some more options

I could reinstall but it would be ~8 bit color depth before upgrading the drivers...

[str8bs]

The behavior you describe sounds a lot like a "phantom" port issue the FX5200 has.

The usual suspect is TV-1 but different cards can name ports differently.

I would first try these.

boot: Linux video=TV-1:d
or
boot: Linux nouveau.tv_disable=1

(replace Linux with live if using live iso.)

If it is a phantom port other than TV, the only way I have found to identify it is a pain. Link

If yours does have this issue, would you mind sharing Xorg and dmesg logs? I am working on thorough documentation for a bug report. It is an interesting little bugger... Depending on what monitor is connected, what port, or whether an adapter is used, the result can range from no display, to poor display, to no problem.

EDIT: Forgot you mentioned SSH. A quick check would be

cat /var/log/Xorg.0.log | grep -i connected

[Trzone]

Here are my Dmesg, Xorg.0.log and Xorg.0.log.old

(I added .doc due to forum limits, they are just txt)


There seems to be TV-1 and TV-2
NOUVEAU(0): Output DVI-I-1 connected
NOUVEAU(0): Output TV-1 connected
NOUVEAU(0): Output DVI-I-2 connected
NOUVEAU(0): Output TV-2 disconnected

Also, is there an integrated graphics card or is this what is allocated?

NOUVEAU(0): GART: 64MiB available

Linux nouveau.tv_disable=1 and Linux video=TV-1:d give me a cool checkerboard of purple, green, beige and brown

I will try disabling other interfaces, dvi-I-1 etc and will look more at your posts at mint

Thanks

[str8bs]

Thanks for the logs. Looks like at least one of your problems is the same as mine. Times 2! I've never seen the checker board, but I would definitely rule out the phantom ports first.

I've learned a lot since writing that guide and am working on simplifying it. I would welcome any suggestions.

Also, is there an integrated graphics card or is this what is allocated?

NOUVEAU(0): GART: 64MiB available

Not sure what you mean by that? Yes your card has GPU. I'm still learning all this stuff, but my understanding is that GART is an address translation table used to access aperture. There is no need to change that usually. It is NOT the same as VRAM or aperture size.

EDIT: After further review of the logs I see a couple of other potential problems. There is a "resize called" in xorg log. That should go away once phantom ports are ruled out. If not, try forcing a mode with boot params or xorg.conf. I see in dmesg "AGP aperture ... @0x0" . To rule that out, append nouveau.agpmode=0 (forces PCI mode) to any other boot parameters you are using. If you get to a good boot, try upping that. (1,2,4,8)

[Trzone]

output of: cat /var/log/Xorg.0.log | grep -i connected

Output DVI-I-1 connected
Output TV-1 connected
Output DVI-I-2 connected
Output TV-2 disconnected

I've also tried: append="video=DVI-I-1:1024x768:@60:-24" and
video=DVI-I-1:1600x1200:@60:-24 and more checkboards


TV-1 & 2 are confirmed phantom ports (no signal msg)
Disabling video=DVI-I-1:d or 2 results in a no signal msg
When either dvi is enabled I get the checker board

Just trying to get some thoughts / suggestions (verbose)

[str8bs]

Just to clarify. You are only connecting a display to DVI-I-2 ?
Is this 12.04?

My FX5200 has ADC port which is recognize as DVI-I-1. When facing the back on mine, that would be the port on the right. Yours may be opposite.

Are you using straight DVI to DVI cable? You might need to force digital with a capital D. IE: DVI-I-2:D

Are you combining appends to disable all phantom ports? example:

boot: video=TV-1:d video=TV-2:d video=DVI-I-1:d nouveau.agpmode=0

EDIT: Clarify "phantom port." I wouldn't call it a "phantom port" unless it sees a load and therefore registered as connected. Just seeing the port doesn't cause a problem, it's that registers a load and connects that creates the problem. In your case, you have TV-1 plus either DVI-I-1 or DVI-I-2. Not sure which one the display is actually plugged it to.

[Trzone]

Yes I should have clarified: Ubuntu 12.04 ppc-64
I am using DVI-1-2 (when facing back, on the left) Should I be using DVI-I-2?

I have tried the nouveau.agpmode=x with this appending:
"append="video=TV-2:d video=TV-1:d nouveau.agpmode=1"
As disabling dvi-I-1 or 2 results in a blank display

I will try with a capital D, I am using a straight dvi to dvi cable, will try all these commands with the cable in the dvi 1 spot(right when facing the back)

Thank you very much!

Output of xrandr: Can't open display

So it seems that my display is not configured. I have tried this to no avail:

sudo apt-get remove --purge xserver-xorg
sudo apt-get install xserver-xorg
sudo dpkg-reconfigure xserver-xorg

**Display plugged into dvi-1 (when facing back, on the right)

[str8bs]

I'm assuming you are running xrandr via SSH? That won't work unless you take control of the right CRTC. Until we rule out phantom ports, it will be trial and error to find that.

Since you have SSH set up, I might try booting with your monitor disconnected and grep for connected. That might help you confirm what it is actually calling each port.

Also, make sure you use agpmode 0 until we get to a GUI. That will only impact performance and we can worry about last.

Running xorg configure IMO will be futile until we know we have eliminated phantom ports. I would recommend not adding xorg.conf to the picture either until phantom ports are confirmed ruled out (disabled.) That will make your logs very confusing.

The first goal we need to achieve is getting to only one port showing connected and confirming that is the same port your display is plugged in to.