My graphic on ubuntu 12.10 does not work as well as on 12.04.
After upgrade I installed driver

sudo apt-add-repository ppa:ubuntu-x-swat/x-updates
sudo apt-get update
sudo apt-get install nvidia-current

for my Nvidia 450 GTS graphics card.

But sometimes I see slight lag on my videos played in VLC player, some of desktop and window effects are lagging, sometimes I can see an indescribable souce of pixels on my screen at the start of ubuntu and so on.

I feel difference between 12.04 and 12.10 in favour of former version.

Does anyone know whats wrong or what I am missing?

here is output of lspci -k:

00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor Family DRAM Controller (rev 09)
00:01.0 PCI bridge: Intel Corporation Xeon E3-1200/2nd Generation Core Processor Family PCI Express Root Port (rev 09)
    Kernel driver in use: pcieport
    Kernel modules: shpchp
00:16.0 Communication controller: Intel Corporation 6 Series/C200 Series Chipset Family MEI Controller #1 (rev 04)
    Subsystem: Giga-byte Technology Device 1c3a
    Kernel driver in use: mei
    Kernel modules: mei
00:1a.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #2 (rev 05)
    Subsystem: Giga-byte Technology Device 5006
    Kernel driver in use: ehci_hcd
00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller (rev 05)
    Subsystem: Giga-byte Technology Device a000
    Kernel driver in use: snd_hda_intel
    Kernel modules: snd-hda-intel
00:1c.0 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 1 (rev b5)
    Kernel driver in use: pcieport
    Kernel modules: shpchp
00:1c.4 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 5 (rev b5)
    Kernel driver in use: pcieport
    Kernel modules: shpchp
00:1d.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #1 (rev 05)
    Subsystem: Giga-byte Technology Device 5006
    Kernel driver in use: ehci_hcd
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev a5)
00:1f.0 ISA bridge: Intel Corporation H61 Express Chipset Family LPC Controller (rev 05)
    Subsystem: Giga-byte Technology Device 5001
    Kernel driver in use: lpc_ich
    Kernel modules: lpc_ich
00:1f.2 IDE interface: Intel Corporation 6 Series/C200 Series Chipset Family 4 port SATA IDE Controller (rev 05)
    Subsystem: Giga-byte Technology Device b002
    Kernel driver in use: ata_piix
00:1f.3 SMBus: Intel Corporation 6 Series/C200 Series Chipset Family SMBus Controller (rev 05)
    Subsystem: Giga-byte Technology Device 5001
    Kernel modules: i2c-i801
00:1f.5 IDE interface: Intel Corporation 6 Series/C200 Series Chipset Family 2 port SATA IDE Controller (rev 05)
    Subsystem: Giga-byte Technology Device b002
    Kernel driver in use: ata_piix
01:00.0 VGA compatible controller: NVIDIA Corporation GF116 [GeForce GTS 450] (rev a1)
    Subsystem: CardExpert Technology Device 0401
    Kernel driver in use: nvidia
    Kernel modules: nvidia_current, nouveau, nvidiafb
01:00.1 Audio device: NVIDIA Corporation GF116 High Definition Audio Controller (rev a1)
    Subsystem: CardExpert Technology Device 0401
    Kernel driver in use: snd_hda_intel
    Kernel modules: snd-hda-intel
03:00.0 Ethernet controller: Atheros Communications Inc. AR8151 v2.0 Gigabit Ethernet (rev c0)
    Subsystem: Giga-byte Technology Device e000
    Kernel driver in use: atl1c
    Kernel modules: atl1c