Comment 15 for bug 656631

Jame Krug: i bet you must have a Dell Latitude E6410 with nVidia and Intel Core i7 2.66GHz. Maybe the GPU does not matter. I spend over 3 weeks analysing the problem. The result is evident: it's not about Ubuntu (in Windows, yes being desperate I installed Win7 on a different HDD to test out, the problem is the same), it's not about Mainboard (Dell replaced my MB), it's not about RAM type (I tested with different modules of different sizes), not even about HDD (i tested with SSD and classical HDD), not about PCI peripherals (i removed all removable PCI peripherals), not about batttery model (I tried with a different models - 6cell and 9cell). It's most probably about the BIOS bug affecting Latitude E6410 with Core i7 620M 2.66Ghz (Dell replaced my CPU for the same model with no improvement); probably a race condition during frequency scaling (SpeedStep) on resume on batteries. Try disabling SpeedStep in BIOS and the problem does not appear; however it is a very unlucky solution. I'm trying to persuade Dell to give me a different nearest model of Core i7 CPU, even though I should pay for the difference in price. I expect that a different resulting CPU frequency helps to avoid the problem. BIOS should resolve it, but who knows when A06 comes out an if it would contain the fix. If one follows the history of E6400 latop overheating issues, it took one year and 10 BIOS revisions to mitigate the problem. I'm not sure whether the GPU is involved in this strange race condition when resuming on batteries. Please paste here your system specifications, especially CPU and GPU specs.