gfxCardStatus is a menu bar application for OS X that allows MacBook Pro. It doesn't expect to ever have to run an external display on the integrated GPU at this point, and certain assumptions may have been made in OS X that that would be the case, at least on these machines. By more precisely controlling when each graphics card is enabled, users can improve system performance or battery life. Some of these issues were being talked about when developer releases of Lion were made available, so it seems like some bugs slipped though the net. One big issue with adding such a feature to gfxCardStatus is that it would likely cause OS X to freak out in some yet-unknown cases. This is another issue that could be related to graphics card drivers. So to use the Intel GPU, you need to trick the EFI by using the 'applesetos' hack either with: rEFInd version 0.10.0 or above. Warning: This is new code and it comes without any. Viewing videos crash causes freezing on new iMacsĪll video types appear to cause the freeze - Flash, H.264, QuickTime, AVIs, MKVs, YouTube. It aims to remove the need of booting into OS X and running gfxCardStatus v2.2.1 to switch to the integrated card.This might be related to the fact that Lion doesn't terminate application processes immediately when applications are closed or it could be a graphics driver issue not allowing the system to switch to integrated graphics from discrete graphics (again, gfxCardStatus might be useful). Installing Lion causes a significant drop in battery life. adrotate banner45 After further continued testing it appears that most users suffering from the OS X BSOD ‘Superbug’ can only use the ‘Integrated only’ option once after which, upon restart of the machine, selecting the ‘Integrated only’ option again, results in a unusable garbled display. Basically the WiFi connection drops and the only way to get it back working is to switch the WiFi adapter off and then back on again.Ī temporary solution to this is to create a script that pings periodically. This is annoying (I'm seeing this happen, although not often). There's no solution from Apple yet but it seems that the problem here is down to NVIDIA drivers and forcing the system to use integrated graphics only using a third-party tool ( gfxCardStatus) helps alleviate the problem. Once the system crashes, it's a hard reset time. Random crashing that results in a totally black screen.
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