I am just trying to install the NVidia closed src drivers on Debian 7.1 AMD64 and the X server is crashing imediatly after start up below is the final part of the Xorg.log, [ 464.993] (**) Option "xkb_model" "pc105" [ 464.993] (**) Option "xkb_layout" "us" [ 464.994] (II) config/udev: Adding input device PC Speaker (/dev/input/event1) [ 464.994] (II) No input driver specified, ignoring this device. [ 464.994] (II) This device may have been added with another device file. [ 465.044] [ 465.044] Backtrace: [ 465.044] 0: /usr/bin/X (xorg_backtrace+0x36) [0x7f2f4ebe5d06] [ 465.044] 1: /usr/bin/X (0x7f2f4ea67000+0x182859) [0x7f2f4ebe9859] [ 465.044] 2: /lib/x86_64-linux-gnu/libpthread.so.0 (0x7f2f4dd8f000+0xf030) [0x7f2f4dd9e030] [ 465.044] 3: /usr/lib/libXfont.so.1 (FontFileListNextFontWithInfo+0x29) [0x7f2f4d8da5b9] [ 465.044] 4: /usr/bin/X (doListFontsWithInfo+0x163) [0x7f2f4eaba473] [ 465.044] 5: /usr/bin/X (ProcessWorkQueue+0x21) [0x7f2f4eabe0b1] [ 465.044] 6: /usr/bin/X (WaitForSomething+0x62) [0x7f2f4ebe3012] [ 465.044] 7: /usr/bin/X (0x7f2f4ea67000+0x52bb1) [0x7f2f4eab9bb1] [ 465.044] 8: /usr/bin/X (0x7f2f4ea67000+0x41ec5) [0x7f2f4eaa8ec5] [ 465.044] 9: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xfd) [0x7f2f4cab6ead] [ 465.044] 10: /usr/bin/X (0x7f2f4ea67000+0x4219d) [0x7f2f4eaa919d] [ 465.044] [ 465.044] Segmentation fault at address (nil) [ 465.044] Fatal server error: [ 465.044] Caught signal 11 (Segmentation fault). Server aborting [ 465.044] [ 465.044] Please consult the The X.Org Foundation support at http://wiki.x.org for help. [ 465.044] Please also check the log file at "/var/log/Xorg.0.log" for additional information. [ 465.044] [ 465.088] (II) evdev: Logitech USB Optical Mouse: Close [ 465.088] (II) UnloadModule: "evdev" [ 465.088] (II) evdev: AT Translated Set 2 keyboard: Close [ 465.088] (II) UnloadModule: "evdev" [ 465.251] Server terminated with error (1). Closing log file. Under a normal start the lines at 464.994 are the last ones in the log after startup. So the driver appears to be starting up OK. I use a custom kernel current version is 3.9.11, NOUVEAU being blacklisted for the closed src driver. A search on the net produce no usefull information. The NOUVEAU runs perfectly except the 3D accelartion is slow and has some texture mapping problems. For normal operations I prefer the OS driver, its no good though for OpenGL development. Lindsay