Hi,
We have three Latitude E6430 notebooks running Windows 7 Enterprise x64. This is a licensed copy from MS and has not been customized in anyway by us. All three systems have the exact same configuration. Two of these systems lock up when we try to resume from sleep or hibernation. The logon prompt comes up but we are unable to enter the password or move the pointer around. The system has to be hard rebooted to get it functioning again. The third notebook that does not exhibit this issue has graphics driver v8.15.10.2639 but those same drivers do not resolve the issue on these two systems. We have tried updating the BIOS, chipset and graphics drivers but issue persists. Tried different graphics driver versions (from Dell support site and Intel) but no go. Dell sent motherboard and processor replacement for one of the systems but issue was not resolved. For testing, Dell tech support asked their engineer to install the OEM copy supplied by Dell (Windows 7 Professional x64) and the issue was not noticed. We then installed our Enterprise copy and issue's immediately back again.
Issue occurs irrespective of how sleep/hibernate is triggered: manual, automatic (timed) or lid closure.
Issue occurs irrespective of power source, AC power or only battery.
Issue occurs even if lid close action is set to 'Turn Off Display' only.
However, if hibernation is disabled the issue does not occur. System could be in sleep or with only the display turned off for hours and it still responds normally after waking up as long as hibernate is disabled.
All three systems have,
Intel Core i7-3540M Processor (Dual Core, 4M Cache, 3.0 GHz, w/HD Graphics 4000)
8GB (2x4GB) 1600MHz DDR3L Memory
500GB Solid State Hybrid Drive
Any help would be much appreciated.
Thanks, Muggy
