Comment 47 for bug 644223

I can confirm this bug on my Dell Latitude E5400, which also uses a Intel Mobile 4 Series chipset (rev 07).

I have installed the 32-bit version of Ubuntu Maverick running kernel 2.6.35-24-generic. The laptop has a 64-bit CPU.

I ran through the pm_trace procedure and got this message:
[ 0.653986] Magic number: 0:608:321
[ 0.653988] hash matches /build/buildd/linux-2.6.35/drivers/base/power/main.c:545
[ 0.654000] tty tty46: hash matches
[ 0.654012] pci 0000:00:02.0: hash matches

The pci number is:
00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07) (prog-if 00 [VGA controller])
        Subsystem: Dell Device 0262
        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 45
        Region 0: Memory at f6c00000 (64-bit, non-prefetchable) [size=4M]
        Region 2: Memory at e0000000 (64-bit, prefetchable) [size=256M]
        Region 4: I/O ports at efe8 [size=8]
        Expansion ROM at <unassigned> [disabled]
        Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
                Address: fee0300c Data: 4199
        Capabilities: [d0] Power Management version 3
                Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
                Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
        Kernel driver in use: i915
        Kernel modules: i915