It is working out badly for me to on a Dell Precision M65 with Quadro FX 350M card

samh@trevor:~$ lspci | grep VGA
01:00.0 VGA compatible controller: NVIDIA Corporation G72GLM [Quadro FX 350M] (rev a1)
samh@trevor:~$ sudo grep -rn "NVRM: Xid" /var/log/
/var/log/syslog:3853:Oct  3 16:22:42 trevor kernel: [   38.001453] NVRM: Xid (PCI:0000:01:00): 1, Channel 00000002 Method 00000060 Data beef0233
/var/log/syslog:3854:Oct  3 16:22:42 trevor kernel: [   38.217918] NVRM: Xid (PCI:0000:01:00): 1, Channel 00000002 Method 00000060 Data beef0233
/var/log/syslog:3855:Oct  3 16:22:42 trevor kernel: [   38.283735] NVRM: Xid (PCI:0000:01:00): 7, Ch 00000000 M 00000154 D 00000000 intr 00010001
/var/log/kern.log:2875:Oct  3 16:22:42 trevor kernel: [   38.001453] NVRM: Xid (PCI:0000:01:00): 1, Channel 00000002 Method 00000060 Data beef0233
/var/log/kern.log:2876:Oct  3 16:22:42 trevor kernel: [   38.217918] NVRM: Xid (PCI:0000:01:00): 1, Channel 00000002 Method 00000060 Data beef0233
/var/log/kern.log:2877:Oct  3 16:22:42 trevor kernel: [   38.283735] NVRM: Xid (PCI:0000:01:00): 7, Ch 00000000 M 00000154 D 00000000 intr 00010001
/var/log/auth.log:95:Oct  3 16:27:19 trevor sudo:     samh : TTY=tty1 ; PWD=/home/samh ; USER=root ; COMMAND=/bin/grep -rn NVRM: Xid /var/log/
/var/log/auth.log:142:Oct  3 16:37:28 trevor sudo:     samh : TTY=tty1 ; PWD=/home/samh ; USER=root ; COMMAND=/bin/grep -rn NVRM: Xid /var/log/
/var/log/auth.log:209:Oct  3 16:58:57 trevor sudo:     samh : TTY=pts/0 ; PWD=/home/samh ; USER=root ; COMMAND=/bin/grep -rn NVRM: Xid /var/log/
/var/log/auth.log:227:Oct  3 17:02:05 trevor sudo:     samh : TTY=pts/0 ; PWD=/home/samh ; USER=root ; COMMAND=/bin/grep -rn NVRM: Xid /var/log/
/var/log/auth.log:233:Oct  3 17:02:48 trevor sudo:     samh : TTY=pts/0 ; PWD=/home/samh ; USER=root ; COMMAND=/bin/grep -rn NVRM: Xid /var/log/
samh@trevor:~$ lspci | grep VGA
01:00.0 VGA compatible controller: NVIDIA Corporation G72GLM [Quadro FX 350M] (rev a1)
samh@trevor:~$ sudo modinfo nvidia_304
filename:       /lib/modules/3.19.0-25-generic/updates/dkms/nvidia_304.ko
alias:          char-major-195-*
version:        304.128
supported:      external
license:        NVIDIA
alias:          pci:v000010DEd00000E00sv*sd*bc04sc80i00*
alias:          pci:v000010DEd00000AA3sv*sd*bc0Bsc40i00*
alias:          pci:v000010DEd*sv*sd*bc03sc02i00*
alias:          pci:v000010DEd*sv*sd*bc03sc00i00*
depends:        drm
vermagic:       3.19.0-25-generic SMP mod_unload modversions 
parm:           NVreg_EnableVia4x:int
parm:           NVreg_EnableALiAGP:int
parm:           NVreg_ReqAGPRate:int
parm:           NVreg_EnableAGPSBA:int
parm:           NVreg_EnableAGPFW:int
parm:           NVreg_Mobile:int
parm:           NVreg_ResmanDebugLevel:int
parm:           NVreg_RmLogonRC:int
parm:           NVreg_ModifyDeviceFiles:int
parm:           NVreg_DeviceFileUID:int
parm:           NVreg_DeviceFileGID:int
parm:           NVreg_DeviceFileMode:int
parm:           NVreg_RemapLimit:int
parm:           NVreg_UpdateMemoryTypes:int
parm:           NVreg_InitializeSystemMemoryAllocations:int
parm:           NVreg_UseVBios:int
parm:           NVreg_RMEdgeIntrCheck:int
parm:           NVreg_UsePageAttributeTable:int
parm:           NVreg_EnableMSI:int
parm:           NVreg_MapRegistersEarly:int
parm:           NVreg_RegisterForACPIEvents:int
parm:           NVreg_RegistryDwords:charp
parm:           NVreg_RmMsg:charp
parm:           NVreg_NvAGP:int

samh@trevor:~$ dpkg -l compiz
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name                                Version                Architecture           Description
+++-===================================-======================-======================-===========================================================================
ii  compiz                              1:0.9.11.3+14.04.20150 all                    OpenGL window and compositing manager

samh@trevor:~$ lsb_release -a
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 14.04.3 LTS
Release:	14.04
Codename:	trusty

Basically a fresh install of 14.04.3 LTS is unusable

I will see if I can workout one of the workarounds