Uninstalling the driver doesn't solve the problem. Delays in sleeping and lockups remain. But only one time the logs says it is a crash:
Panic (system crashes) log:
Source: /Library/Logs/DiagnosticReports/Kernel_2014-01-10-201958_MacPro.panic
Size: 8 KB (7.692 bytes)
Last Modified: 11/01/14 11:24
Recent Contents: Anonymous UUID: 65667677-F579-95EE-2E6C-96B823FE550F
Fri Jan 10 20:19:58 2014
panic(cpu 0 caller 0xffffff8011adc19e): Kernel trap at 0xffffff7f93e8ebcc, type 14=page fault, registers:
CR0: 0x000000008001003b, CR2: 0xffffff7f93e8ebcc, CR3: 0x0000000014512000, CR4: 0x00000000000206e0
RAX: 0x00000000001f0000, RBX: 0xffffff8051cda600, RCX: 0xffffff8032a38c00, RDX: 0x00000000e0000340
RSP: 0xffffff81e4433c38, RBP: 0xffffff81e4433c90, RSI: 0x0000000000000000, RDI: 0xffffff8055570000
R8: 0xffffff81e4433cd0, R9: 0x0000000000000028, R10: 0xffffff81e4433cf0, R11: 0x0000000000000200
R12: 0x00000000e00002c2, R13: 0x00000000e0000340, R14: 0xffffff8051cda638, R15: 0xffffff8032a38c00
RFL: 0x0000000000010246, RIP: 0xffffff7f93e8ebcc, CS: 0x0000000000000008, SS: 0x0000000000000010
Fault CR2: 0xffffff7f93e8ebcc, Error code: 0x0000000000000010, Fault CPU: 0x0
Backtrace (CPU 0), Frame : Return Address
0xffffff81e44338c0 : 0xffffff8011a22f69
0xffffff81e4433940 : 0xffffff8011adc19e
0xffffff81e4433b10 : 0xffffff8011af3606
0xffffff81e4433b30 : 0xffffff7f93e8ebcc
0xffffff81e4433c90 : 0xffffff8011ea45f1
0xffffff81e4433d40 : 0xffffff8011e8f6d9
0xffffff81e4433d80 : 0xffffff8011ea1ce4
0xffffff81e4433e10 : 0xffffff8011ede48d
0xffffff81e4433e40 : 0xffffff8011e97eac
0xffffff81e4433eb0 : 0xffffff8011ea6ba4
0xffffff81e4433ef0 : 0xffffff8011ea6caf
0xffffff81e4433f30 : 0xffffff8011eac522
0xffffff81e4433f80 : 0xffffff8011eac5f7
0xffffff81e4433fb0 : 0xffffff8011ad6aa7
BSD process name corresponding to current thread: kernel_task
Mac OS version:
13B42
Kernel version:
Darwin Kernel Version 13.0.0: Thu Sep 19 22:22:27 PDT 2013; root:xnu-2422.1.72~6/RELEASE_X86_64
Kernel UUID: 1D9369E3-D0A5-31B6-8D16-BFFBBB390393
Kernel slide: 0x0000000011800000
Kernel text base: 0xffffff8011a00000
System model name: MacPro5,1 (Mac-F221BEC8)
System uptime in nanoseconds: 20042820170752
last loaded kext at 20015412073822: com.apple.driver.AppleUSBCDC 4.2.1b2 (addr 0xffffff7f93e82000, size 20480)
last unloaded kext at 19941437551695: com.apple.driver.AppleUSBCDC 4.2.1b2 (addr 0xffffff7f93e82000, size 16384)
loaded kexts:
com.taoeffect.ispy.kext