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 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/644223 Title: Suspend problem with Maverick on ThinkPad W500 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs