I’m using CUDA 5.5 in RHEL 6.3. Previously, everything worked just fine: the system booted to X windows and I could use CUDA. Recently I tried re-installing the NVidia driver and CUDA 5.5 using the rpm. Since then, I have not been able to boot into X windows. Xorg.5.log shows the following:
[ 50.071] (EE) NVIDIA(0): Failed to assign any connected display devices to X screen 0.
[ 50.071] (EE) NVIDIA(0): Set AllowEmptyInitialConfiguration if you want the server
[ 50.071] (EE) NVIDIA(0): to start anyway
[ 50.355] (EE) NVIDIA(0): Failing initialization of X screen 0
[ 50.355] (II) UnloadModule: “nvidia”
[ 50.355] (II) Unloading nvidia
[ 50.355] (II) UnloadModule: “wfb”
[ 50.355] (II) Unloading wfb
[ 50.355] (II) UnloadModule: “fb”
[ 50.355] (II) Unloading fb
[ 50.355] (EE) Screen(s) found, but none have a usable configuration.
Fatal server error:
[ 50.355] no screens found
Please consult the Red Hat, Inc. support
[ 50.355] Please also check the log file at “/var/log/Xorg.5.log” for additional information.
I’ve also tried the following:
- Uninstalled all NVidia rpms (xorg-x11-drv-nvidia*, nvidia*, cuda-*), then installed CUDA 5.5 from .run file (like my original installation which used to work).
- Installed CUDA 6.0 RC version of the driver from CUDA .run file.
- Installed the latest version of the driver (331.49) using the .run file.
The result is the same in every case, with the same errors in Xorg.5.log.
I made sure in every case that there was an xorg.conf file, running nvidia-xconfig if needed. The nouveau driver is not loaded (verified with lsmod). I tried the “uppermem 524288”, “vmalloc=256MB”, and “nomodeset” options in grub.conf, but these did not help.
My system has a GTX 680 (the display GPU) and a GTX 580.
Apparently the CUDA/driver rpms did something to my system that is preventing it from starting X.
Does anyone know how I can get this system to go into X windows again?