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TOPIC: EMC2 won't start, errors

Re:EMC2 won't start, errors 30 Dic 2011 12:50 #16132

  • PCW
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[ 120.382236] vmap allocation for size 2101248 failed: use vmalloc=<size> to increase size.
[ 120.382238] RTAI[malloc]: failed to initialize the global heap (size=2097152 bytes).

also earlier:
[ 6.653814] vmap allocation for size 2101248 failed: use vmalloc=<size> to increase size
might be related

Pretty clear trying to allocate 2101248 bytes from a 2097152 pool wont work
but why this is happening just on your system, I have no idea (above my pay grade)
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Re:EMC2 won't start, errors 30 Dic 2011 18:00 #16145

Hmm. This might have to do with the fact that my computer has two Nvidia 8800GTX graphics cards eating all the vmalloc space (I dual boot Ubuntu and Windows 7). I guess I'll be researching how to increase vmalloc size.
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Re:EMC2 won't start, errors 30 Dic 2011 20:02 #16147

Solved.
cd /etc/default
sudo gedit grub

Add "vmalloc=512M" between the quotes in the "GRUB_CMDLINE_LINUX_DEFAULT=" line so as to make something like:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash vmalloc=512M"

That number probably could have been less, like 256M.
Don't forget to update Grub:
sudo update-grub
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EMC2 won't start, errors 28 Mar 2012 02:21 #18840

  • centaur
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Hi Folks - I too am experiencing grief with starting EMC and I don't have a clue what to do. Fresh install from the latest Live CD.
At the desktop I select EMC from the applications menu and choose the Sherline 3 axis inch simulation and here is what I get (attached text file). Looking at the file but not really understanding what I'm seeing, it appears that evrything is failing.
Sure could use some guru input - Thanx This attachment is hidden for guests. Please log in or register to see it.
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Last Edit: 28 Mar 2012 02:25 by centaur.
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Re:EMC2 won't start, errors 28 Mar 2012 03:21 #18841

  • ArcEye
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Hi

wiki.linuxcnc.org/cgi-bin/wiki.pl?Troubl..._t_run_missing_lapic

You should find the error messages quoted in this link familiar and it tells you how to fix

regards
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Re:EMC2 won't start, errors 28 Mar 2012 10:12 #18842

  • centaur
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Thanks ArcEye - I take a look-see later today and keep us posted.
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