This is not a problem with the NVidia graphics driver. If you look at the backtrace I provided, you can see that the assertion failure occurs within Xorg's security extension (Xext/security.c). Specifically, you can see the assertion failure message in the backtrace: "X: ../../Xext/security.c:322: SecurityAuthorizationExpired: Assertion `pAuth->timer == timer' failed." (entry #3 in the backtrace; the stuff that occurs after that is the implementation of the assertion failure).
This is not a problem with the NVidia graphics driver. If you look at the backtrace I provided, you can see that the assertion failure occurs within Xorg's security extension (Xext/security.c). Specifically, you can see the assertion failure message in the backtrace: "X: ../../Xext/ security. c:322: SecurityAuthori zationExpired: Assertion `pAuth->timer == timer' failed." (entry #3 in the backtrace; the stuff that occurs after that is the implementation of the assertion failure).