Its the first time i need an expert, a littlebit ambarrassing maybe.
Please read carefully.
I have "X" in Windows 7 but not in Linux, neither with the nvidia nor the nv driver with any distribution (tested ubuntu 8.10 / 9.04; Fedora 10).
1. i bought a nvidia gtx260 on ebay with preinstalled watercooling. No bill, no original wrapping, no original stock-cooler.
2. it worked with no problem in Kubuntu 9.04-64 with nvidia 185.18.14.
3. i tried coolbits & autoadjust, applied -> working.
4. played Nexuiz, 10min, freeze, cold restart.
5. "X" not working: Black screen.
6. tried several things (distributions, drivers, with and without coolbits, etc.) -> alway black screen. but VESA worked.
7. Downloaded&Installed Win7 -> Black screen after installation
8. Win7 + Fallback mode "640*480 worked, installed driver nvidia 186.18 -> driver changed automatically resolution to 1600*1200, 3D-acceleration active.
9. default restart win7, works. 3D Acceleration active. No graphical errors, all clocks at default (source: gpu-z / rivatuner /atitool)
10. test Live CD kubuntu 9.04 (NV-driver) -> black screen
11. test installed system Kubuntu 9.04 with nvidia 185.18.14 -> black screen.
13. Default Win7 start -> black screen
14. Win7 + Fallback mode "640*480, worked, set resolution to 1600*1200
15. restart Win7 default -> worked with 3d (tested nexuiz, no problems, high performance), clocks are default.
16. All steps are reproduceable, please ask, which logs /screenshots you may need.
Has anyone, any idea whats going on there?
- wrong 2D- or 3D-clock on startup (coolbits?)
- interrupted Fallback (see "4.") caused by cold restart
- corrupted bios
The black screen,was first seen after the coolbits "auto adjust" in nvidia-settings. Since this time i always get a black screen in Linux; And in Win7 after i used any linux distribution before.
I had a fairly similar issue with the 185 driver on an older 8500 card. Although it did fine while in use, X would freeze up when the computer was idle for a while. I don't know how long it took to freeze up but nothing would respond, not even hitting NumLock would toggle.
This required several hard reboots which eventually prompted Ubuntu 9.04 to run fsck on the drives.
What eventually began happening is a black screen or sometimes the nVidia splash screen after the Ubuntu splash screen, and then a total lockup. I ran the live CD and it booted just fine but booting back into the 185 driver produced the same thing. I even ensured the card didn't have a popped capacitor and reseated the card.
What finally worked is moving back to the latest 180 driver. The computer will boot without the black screen/lockup and will idle without the lockup.