Even on NVidia's newest drivers this happens. This should be of pretty high importance, I'd imagine many people run NVidia+Compiz. What else could I post to help? This is all the log info I get from the newest driver set for nvidia released on 5/18/2015:

May 19 10:54:05 Aaron-Arch kernel: NVRM: Xid (PCI:0000:01:00): 31, Ch 00000010, engmask 00000101, intr 10000000
May 19 10:54:06 Aaron-Arch kernel: NVRM: Xid (PCI:0000:01:00): 31, Ch 00000010, engmask 00000111, intr 10000000
May 19 10:54:06 Aaron-Arch kernel: NVRM: Xid (PCI:0000:01:00): 31, Ch 00000010, engmask 00000111, intr 10000000
May 19 10:54:06 Aaron-Arch kernel: NVRM: Xid (PCI:0000:01:00): 31, Ch 00000010, engmask 00000111, intr 10000000
May 19 10:54:06 Aaron-Arch kernel: NVRM: Xid (PCI:0000:01:00): 31, Ch 00000010, engmask 00000111, intr 10000000
May 19 10:54:06 Aaron-Arch kernel: NVRM: Xid (PCI:0000:01:00): 31, Ch 00000010, engmask 00000111, intr 10000000
May 19 10:54:06 Aaron-Arch kernel: NVRM: Xid (PCI:0000:01:00): 31, Ch 00000010, engmask 00000111, intr 10000000
May 19 10:54:06 Aaron-Arch kernel: NVRM: Xid (PCI:0000:01:00): 31, Ch 00000010, engmask 00000111, intr 10000000
May 19 10:54:06 Aaron-Arch kernel: NVRM: Xid (PCI:0000:01:00): 31, Ch 00000010, engmask 00000111, intr 10000000
May 19 10:54:06 Aaron-Arch kernel: NVRM: Xid (PCI:0000:01:00): 31, Ch 00000010, engmask 00000111, intr 10000000
May 19 10:54:06 Aaron-Arch kernel: NVRM: Xid (PCI:0000:01:00): 31, Ch 00000010, engmask 00000111, intr 10000000
May 19 10:54:06 Aaron-Arch kernel: NVRM: Xid (PCI:0000:01:00): 31, Ch 00000010, engmask 00000111, intr 10000000
May 19 10:54:06 Aaron-Arch kernel: NVRM: Xid (PCI:0000:01:00): 31, Ch 00000010, engmask 00000111, intr 10000000
May 19 10:54:06 Aaron-Arch kernel: NVRM: Xid (PCI:0000:01:00): 31, Ch 00000010, engmask 00000111, intr 10000000
May 19 10:54:06 Aaron-Arch kernel: NVRM: Xid (PCI:0000:01:00): 31, Ch 00000010, engmask 00000111, intr 10000000
May 19 10:54:06 Aaron-Arch kernel: NVRM: Xid (PCI:0000:01:00): 31, Ch 00000010, engmask 00000111, intr 10000000
May 19 10:54:06 Aaron-Arch kernel: NVRM: Xid (PCI:0000:01:00): 31, Ch 00000010, engmask 00000111, intr 10000000
May 19 10:54:07 Aaron-Arch kernel: NVRM: Xid (PCI:0000:01:00): 31, Ch 00000010, engmask 00000111, intr 10000000
May 19 10:54:07 Aaron-Arch kernel: NVRM: Xid (PCI:0000:01:00): 31, Ch 00000010, engmask 00000111, intr 10000000
May 19 10:54:07 Aaron-Arch kernel: NVRM: Xid (PCI:0000:01:00): 31, Ch 00000010, engmask 00000111, intr 10000000
May 19 10:54:07 Aaron-Arch kernel: NVRM: Xid (PCI:0000:01:00): 31, Ch 00000010, engmask 00000111, intr 10000000
May 19 10:54:07 Aaron-Arch kernel: NVRM: Xid (PCI:0000:01:00): 31, Ch 00000010, engmask 00000111, intr 10000000
May 19 10:54:07 Aaron-Arch kernel: NVRM: Xid (PCI:0000:01:00): 31, Ch 00000010, engmask 00000111, intr 10000000
May 19 10:54:07 Aaron-Arch kernel: NVRM: Xid (PCI:0000:01:00): 31, Ch 00000010, engmask 00000111, intr 10000000
May 19 10:54:07 Aaron-Arch kernel: NVRM: Xid (PCI:0000:01:00): 31, Ch 00000010, engmask 00000111, intr 10000000
May 19 10:54:07 Aaron-Arch kernel: NVRM: Xid (PCI:0000:01:00): 31, Ch 00000010, engmask 00000111, intr 10000000
May 19 10:54:07 Aaron-Arch kernel: NVRM: Xid (PCI:0000:01:00): 31, Ch 00000010, engmask 00000111, intr 10000000
May 19 10:54:07 Aaron-Arch kernel: NVRM: Xid (PCI:0000:01:00): 31, Ch 00000010, engmask 00000111, intr 10000000
May 19 10:54:07 Aaron-Arch kernel: NVRM: Xid (PCI:0000:01:00): 31, Ch 00000010, engmask 00000111, intr 10000000
May 19 10:54:07 Aaron-Arch kernel: NVRM: Xid (PCI:0000:01:00): 31, Ch 00000010, engmask 00000111, intr 10000000
May 19 10:54:07 Aaron-Arch kernel: NVRM: Xid (PCI:0000:01:00): 31, Ch 00000010, engmask 00000111, intr 10000000
May 19 10:54:07 Aaron-Arch kernel: NVRM: Xid (PCI:0000:01:00): 31, Ch 00000010, engmask 00000111, intr 10000000
May 19 10:54:07 Aaron-Arch kernel: NVRM: Xid (PCI:0000:01:00): 31, Ch 00000010, engmask 00000111, intr 10000000
May 19 10:54:08 Aaron-Arch kernel: NVRM: Xid (PCI:0000:01:00): 31, Ch 00000010, engmask 00000111, intr 10000000
May 19 10:54:08 Aaron-Arch kernel: NVRM: Xid (PCI:0000:01:00): 31, Ch 00000010, engmask 00000111, intr 10000000
May 19 10:54:08 Aaron-Arch kernel: NVRM: Xid (PCI:0000:01:00): 31, Ch 00000010, engmask 00000111, intr 10000000
May 19 10:54:08 Aaron-Arch kernel: NVRM: Xid (PCI:0000:01:00): 31, Ch 00000010, engmask 00000111, intr 10000000
May 19 10:54:08 Aaron-Arch kernel: NVRM: Xid (PCI:0000:01:00): 31, Ch 00000010, engmask 00000111, intr 10000000
May 19 10:54:08 Aaron-Arch kernel: NVRM: Xid (PCI:0000:01:00): 31, Ch 00000010, engmask 00000111, intr 10000000
May 19 10:54:08 Aaron-Arch kernel: NVRM: Xid (PCI:0000:01:00): 31, Ch 00000010, engmask 00000111, intr 10000000
May 19 10:54:08 Aaron-Arch kernel: NVRM: Xid (PCI:0000:01:00): 31, Ch 00000010, engmask 00000111, intr 10000000
May 19 10:54:08 Aaron-Arch kernel: NVRM: Xid (PCI:0000:01:00): 31, Ch 00000010, engmask 00000111, intr 10000000
May 19 10:54:08 Aaron-Arch kernel: NVRM: Xid (PCI:0000:01:00): 31, Ch 00000010, engmask 00000111, intr 10000000
May 19 10:54:08 Aaron-Arch kernel: NVRM: Xid (PCI:0000:01:00): 31, Ch 00000010, engmask 00000111, intr 10000000
May 19 10:54:08 Aaron-Arch kernel: NVRM: Xid (PCI:0000:01:00): 31, Ch 00000010, engmask 00000111, intr 10000000
May 19 10:54:08 Aaron-Arch kernel: NVRM: Xid (PCI:0000:01:00): 31, Ch 00000010, engmask 00000111, intr 10000000
May 19 10:54:08 Aaron-Arch kernel: NVRM: Xid (PCI:0000:01:00): 31, Ch 00000010, engmask 00000111, intr 10000000
May 19 10:54:08 Aaron-Arch kernel: NVRM: Xid (PCI:0000:01:00): 31, Ch 00000010, engmask 00000111, intr 10000000
May 19 10:54:08 Aaron-Arch kernel: NVRM: Xid (PCI:0000:01:00): 31, Ch 00000010, engmask 00000111, intr 10000000
May 19 10:54:09 Aaron-Arch kernel: NVRM: Xid (PCI:0000:01:00): 31, Ch 00000010, engmask 00000111, intr 10000000
May 19 10:54:09 Aaron-Arch kernel: NVRM: Xid (PCI:0000:01:00): 31, Ch 00000010, engmask 00000111, intr 10000000
May 19 10:54:09 Aaron-Arch systemd-coredump[2327]: Process 2238 (compiz) of user 1000 dumped core.

It crashes the X server completely until it's restarted by the NVidia driver.