output of cat /proc/cmdline
BOOT_IMAGE=/boot/vmlinuz-3.5.0-17-generic root=UUID=706abb01-8cff-48d5-86d6-4812dc2e86ad ro acpi_osi= quiet splash vt.handoff=7
output of sudo lspci -vnn | grep -A12 VGA

    Subsystem: Sony Corporation Device [104d:90aa]
    Flags: bus master, fast devsel, latency 0, IRQ 45
    Memory at e0000000 (64-bit, prefetchable) [size=256M]
    Memory at f7e20000 (64-bit, non-prefetchable) [size=128K]
    I/O ports at e000 [size=256]
    Expansion ROM at f7e00000 [disabled] [size=128K]
    Capabilities: [50] Power Management version 3
    Capabilities: [58] Express Legacy Endpoint, MSI 00
    Capabilities: [a0] MSI: Enable+ Count=1/1 Maskable- 64bit+
    Capabilities: [100] Vendor Specific Information: ID=0001 Rev=1 Len=010 <?>
    Capabilities: [150] Advanced Error Reporting
    Kernel driver in use: radeon
output of pastebinit /var/log/dmesg