Comment 35 for bug 915265

Tested on a GeForce GT 520 [10de:1040] from MSI, unity 5.16.0-0ubuntu1 has fixed this issue.

02:00.0 VGA compatible controller [0300]: NVIDIA Corporation GF119 [GeForce GT 520] [10de:1040] (rev a1) (prog-if 00 [VGA controller])
 Subsystem: Micro-Star International Co., Ltd. Device [1462:2630]
 Flags: bus master, fast devsel, latency 0, IRQ 16
 Memory at fb000000 (32-bit, non-prefetchable) [size=16M]
 Memory at d8000000 (64-bit, prefetchable) [size=128M]
 Memory at e6000000 (64-bit, prefetchable) [size=32M]
 I/O ports at ac00 [size=128]
 [virtual] Expansion ROM at e0000000 [disabled] [size=512K]
 Capabilities: [60] Power Management version 3
 Capabilities: [68] MSI: Enable- Count=1/1 Maskable- 64bit+
 Capabilities: [78] Express Endpoint, MSI 00
 Capabilities: [b4] Vendor Specific Information: Len=14 <?>
 Capabilities: [100] Virtual Channel
 Capabilities: [128] Power Budgeting <?>
 Capabilities: [600] Vendor Specific Information: ID=0001 Rev=1 Len=024 <?>
 Kernel driver in use: nvidia
 Kernel modules: nvidia_current, nouveau, nvidiafb