Monitor Issue prevents startup

**rlinsurf** · February 16th, 2012

I can't start because I'm getting the following output, and then it just sits there. Anyone know what's going on here?

I'm running on a Mac Pro5,1 with an Apple 23" Cinema Display.

**gordintoronto** · February 16th, 2012

What version of Ubuntu? Dual-boot? If you still have Mac OS, what does DisplayConfigX show? What cable? No bent pins in the connectors?

**rlinsurf** · February 17th, 2012

I don't know because I can't get into it, but I ran all the updates to my 10.x version sometime in September.

DisplayConfigX says:

Name: LED Cinema Display
ID: 610=APP
Model: 9226

Card: ATIRadeonX3000
Driver: 1.6.36.10
Memory: 512 MB

The Cable is a dual-link DVI port, with the monitor in one of the ports, and no it's all in perfect shape.

**rlinsurf** · February 17th, 2012

Sorry, I was wrong. It's in the mini DisplayPort.

Also, when I try starting up now, I just get a black screen.

Help!

**rlinsurf** · February 17th, 2012

I had some more wrong information. This is Ubuntu 11.x, not 10.x.

**rlinsurf** · February 17th, 2012

Ok, I just tried to reinstall the whole OS from the LiveCD. The install went fine, but when I tried to reboot into the OS, I got the same black screen, this time with a blinking cursor and nothing else.

**rlinsurf** · February 17th, 2012

I just tried to run the 11.10 installer again, and this time checked everything. When doing the partitioning, I checked for any messages and I got: I-I-1: probed a monitor but no|invalid EDID.

I also read it might be where I'm installing grub, but I don't see the Advanced options on the LiveCD like they used to be. Can someone tell me how to install grub?

**gordintoronto** · February 18th, 2012

Grub is automatically installed. Is it possible to try a different cable/connector? Do the computer and the monitor both have DVI, for example?

**rlinsurf** · February 18th, 2012

Maybe that's the issue. This is a partitioned drive with a Lion volume as well as the swap and the ext4 which I was trying to install on. If I select the ext4 partition in the partition manager, is that where Ubuntu and grub go?

Perhaps this maybe a Lion problem? I installed lion after I was already running Ubuntu successfully, maybe that's what screwed it up?