Hi All,
As per the title I am attempting to disable the AMD discrete card so the machine uses only the integrated card. I originally went through the graphics card recall for this machine however as expected the replacement discrete card has now failed again. I can use gfxCardStatus to switch the cards after logging in if I can get that far. To actually log in however it is a lengthy cycle of restarts and reboots so the machine uses the integrated card after boot. I understand if I log in using the discrete and the machine gets as far as the white screen when user log in should complete and the machine restarts, the integrated card is defaulted at next boot. This isn't always the case however and I now need to disable the discrete card from the command line. I have gone through the steps of resetting PRAM and SMC.
The issue here is I cannot get the machine to enter single user mode using cmd rs. Now I know the file vault is enabled and I need to disable that however I cannot do that as the combination cmd s also does not work. Nor does entering via verbose mode (cmd v). In each case above I am presented with the screen attached for a quick few seconds and then the machine continues to boot to the log in screen. I am also not able to enter either internet or system recovery mode. I can get to the spinning globe, connect internet and upon progress bar completion the machine hangs. I can run a hardware diagnostic and this returns no issue.
I feel my issue is relating to the file vault as that seems to be the first error returned from the screen attached. I would be grateful if someone has experience or knowledge of such issues could take a look at the attached and discern what appears to be occurring here and a possible work around to disable the discrete card and default the machine to booting up using only the integrated card. Aside from the discrete card this machine has functions as good as the day I bought it and until I can do better research on current models I am not in a great rush to purchase if I don't absolutely need to.
Feel free to ask any further information you need and I am grateful in advance for any insight or possible solutions here.
As per the title I am attempting to disable the AMD discrete card so the machine uses only the integrated card. I originally went through the graphics card recall for this machine however as expected the replacement discrete card has now failed again. I can use gfxCardStatus to switch the cards after logging in if I can get that far. To actually log in however it is a lengthy cycle of restarts and reboots so the machine uses the integrated card after boot. I understand if I log in using the discrete and the machine gets as far as the white screen when user log in should complete and the machine restarts, the integrated card is defaulted at next boot. This isn't always the case however and I now need to disable the discrete card from the command line. I have gone through the steps of resetting PRAM and SMC.
The issue here is I cannot get the machine to enter single user mode using cmd rs. Now I know the file vault is enabled and I need to disable that however I cannot do that as the combination cmd s also does not work. Nor does entering via verbose mode (cmd v). In each case above I am presented with the screen attached for a quick few seconds and then the machine continues to boot to the log in screen. I am also not able to enter either internet or system recovery mode. I can get to the spinning globe, connect internet and upon progress bar completion the machine hangs. I can run a hardware diagnostic and this returns no issue.
I feel my issue is relating to the file vault as that seems to be the first error returned from the screen attached. I would be grateful if someone has experience or knowledge of such issues could take a look at the attached and discern what appears to be occurring here and a possible work around to disable the discrete card and default the machine to booting up using only the integrated card. Aside from the discrete card this machine has functions as good as the day I bought it and until I can do better research on current models I am not in a great rush to purchase if I don't absolutely need to.
Feel free to ask any further information you need and I am grateful in advance for any insight or possible solutions here.
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