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From: Van Chocstraw on 9 Dec 2009 20:59 What's the difference between regular boot and failsafe boot other than the manual login and startx? My VM is hanging after autologin but failsafe works ok.
From: Malcolm on 9 Dec 2009 21:38 On Wed, 09 Dec 2009 20:59:08 -0500 Van Chocstraw <boobooililililil(a)roadrunner.com> wrote: > What's the difference between regular boot and failsafe boot other > than the manual login and startx? > > My VM is hanging after autologin but failsafe works ok. Hi Look at the grub options to see the difference; Mine is; Normal showopts vga=0x314 Failsafe showopts apm=off noresume nosmp maxcpus=0 edd=off powersaved=off nohz=off highres=off processor.max_cstate=1 x11failsafe vga=0x314 -- Cheers Malcolm ��� (Linux Counter #276890) SUSE Linux Enterprise Desktop 11 (x86_64) Kernel 2.6.27.39-0.3-default up 5 days 6:27, 4 users, load average: 0.04, 0.12, 0.10 GPU GeForce 8600 GTS Silent - CUDA Driver Version: 190.18
From: David Bolt on 9 Dec 2009 21:33 On Thursday 10 Dec 2009 01:59, while playing with a tin of spray paint, Van Chocstraw painted this mural: > What's the difference between regular boot and failsafe boot other than > the manual login and startx? > > My VM is hanging after autologin but failsafe works ok. When a normal boot fails, using the failsafe boot turns off several features which will, hopefully, get you a running system where you can try and debug it and find out why it's failing normally. If you look at the options that are disabled, you can see that it's going to run a lot slower. For a start, DMA is turned off: ide=nodma as is power management and the powersave daemon: apm=off powersaved=off Also, it sets X so it starts in failsafe mode: x11failsafe As for the other options: noresume edd=off nohz=off highres=off processor.max_cstate=1 I'll let you have a look for what they do[0]. [0] Mainly because I don't know, and haven't looked them up :) Regards, David Bolt -- Team Acorn: www.distributed.net OGR-NG @ ~100Mnodes RC5-72 @ ~1Mkeys/s openSUSE 11.0 32b | | openSUSE 11.2 32b | openSUSE 11.0 64b | openSUSE 11.1 64b | openSUSE 11.2 64b | TOS 4.02 | openSUSE 11.1 PPC | RISC OS 4.02 | RISC OS 3.11
From: Eef Hartman on 22 Dec 2009 13:09
David Bolt <blacklist-me(a)davjam.org> wrote: > On Thursday 10 Dec 2009 01:59, while playing with a tin of spray paint, > noresume edd=off nohz=off highres=off processor.max_cstate=1 > > I'll let you have a look for what they do[0]. > > > [0] Mainly because I don't know, and haven't looked them up :) Some of them (maxcpus and processor.max) also turn of multi-core processing, so you're down to the single cpu/core in failsafe. -- ******************************************************************* ** Eef Hartman, Delft University of Technology, dept. SSC/ICT ** ** e-mail: E.J.M.Hartman(a)tudelft.nl - phone: +31-15-278 82525 ** ******************************************************************* |