Description of problem:
My Vaio VPC-Y2 (Intel IGP, details below) has worked fine with kernels up to 3.7.9-201; however, with both 3.8.1-201.fc18 (in updates) and 3.8.2-201.fc18 (latest stable build in Koji), upon resuming from suspend the backlight remains disabled.

The computer itself still responds, at least I could switch to a virtual console and issue CTRL-ALT-DEL to trigger a restart.

Version-Release number of selected component (if applicable):
kernel-3.8.1-201.fc18.x86_64
kernel-3.8.2-201.fc18.x86_64

How reproducible:
Always

Steps to Reproduce:
1. Boot laptop
2. From GDM or a logged in session, suspend by closing lid
3. Resume by opening lid and pressing any key
  
Actual results:
Computer resumes, but backlight is disabled

Expected results:
Computer resumes, backlight enabled

Additional info:
lspci -nnvv output:
00:02.0 VGA compatible controller [0300]: Intel Corporation Core Processor Integrated Graphics Controller [8086:0046] (rev 02) (prog-if 00 [VGA controller])
        Subsystem: Sony Corporation Device [104d:9076]
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
        Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
        Latency: 0
        Interrupt: pin A routed to IRQ 41
        Region 0: Memory at d0000000 (64-bit, non-prefetchable) [size=4M]
        Region 2: Memory at c0000000 (64-bit, prefetchable) [size=256M]
        Region 4: I/O ports at 5050 [size=8]
        Expansion ROM at <unassigned> [disabled]
        Capabilities: <access denied>
        Kernel driver in use: i915