On 02/03/2012 11:19 AM, don fisher wrote:
If the current kernel does not work as desired, how does one choose the previous kernel? The only choices I see are: 1. edit the script that says do not edit 2. remove the bad kernel from /boot and run grub2-mkconfig Please advise. Once boot is broken, it is really bad!
Currently, I have to select an old 2.x kernel on my laptop because all of the 3.x kernels hang. It's safe to edit /boot/grub2/grub.cfg if you're careful, but the next time it's generated your changes will go away. One thing that's safe to change is the timeout period, because all that does is decide how long you have before grub2 starts booting your default kernel. Setting it to 5 gives you five seconds, and that should be ample because once you press the ANY key, the timer stops; if you have good reflexes, or quick boot times are important, three's probably ample.
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