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About DEMandell

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    InsanelyMac Protégé
  1. Greetings, The other day I remember running across mention of some way of explicitly turning on the dual-link dvi output of an Nvidia graphics card, but I can't find it now! I have an ancient GeForce 8400 in a machine running Mavericks, and when I hook it up to a large monitor using a dual-link cable, and running at 2560 x 1440, the signal shows up at half resolution (i.e. doubled pixels). Using the same monitor and cable on a different machine and graphics card (running Snow Leopard) works correctly so I know the monitor and cable are fine. It could be that I'm wasting my time with junky hardware and this card doesn't do dual-link, but it's what I have right now. One challenge with using a better graphics card (I have several) is that this computer, which in other ways is an excellent machine (Quad core Xeon), doesn't have the extra power connector needed by the higher end graphics cards so I can't even try the ones I do have. Any suggestions? Thanks.
  2. Hi Mirone, Thanks for the response. Unfortunately GraphicsEnabler=No doesn't work. That causes the screen to shut off entirely and the computer to become completely unresponsive. Even the caps-lock key no longer turns on and off the light. I'm pretty sure this isn't a graphics problem since once the computer switches to graphics mode (about 3 minutes after the last text is printed by the kernel boot process) the screen correctly shows a mouse pointer initially that tracks mouse movements, and then shows the colorful spinning ball, still tracking mouse movements. Caps-lock remains responsive, and even screen blanking timeout works, and the screen comes back on with a key press. If I could only get some diagnostics to show up on a serial port (this is a PC after all and does have serial ports) or have a getty started on a serial port (see this link) then I might be able to see more of what's happening. Not sure how the serial port enumerates in a system like this...
  3. Greetings, I am doing a "vanilla" installation using the excellent instructions in this installation guide, and have run into a problem: First, the hardware list: Motherboard: Asus P5K-V, latest BIOS (version 1002) CPU: Core 2 Duo E7500 2.93 GHz RAM: 8 GB Graphics: PNY GeForce 9800 GT GDDR3 1GB This computer has been running Snow Leopard stably for quite a while, so I know there are no fundamental problems with the hardware. When I boot from my prepared USB drive, it boots the operating system to the point where the graphics mode is engaged, and then I am left with a white screen initially with a mouse pointer arrow, and then with the "spinning beachball". Since it takes quite a while to reach this point, I have left the system in this state for a long time to see if it ever recovers, and so far it hasn't. I know that the CPU hasn't crashed completely because the "beachball" continues to spin, I can move the mouse pointer, and the system even blanks the screen if I let it sit long enough, turning it back on when I hit a key on the keyboard. I have used a variety of boot arguments: -v (I would never boot without this one!) GraphicsEnabler=Yes (graphics come up, but then something else seems to hang), -x (safe mode simply takes longer with the mouse pointer arrow before the spinning ball appears), but nothing seems to give a different result. Any suggestions? What else might I try? Is there any way to have the system provide additional debug information? Thanks in advance to all.