[Emc-users] crashing under 2.8.0-pre1
I have compiled 2.8.0-pre1 from source for a non-trivkins
project. I am using a Mesa 7I43 board. When I run linuxcnc
with software stepgens (no hostmot2), all is well. If I create
a plain-vanilla Mesa-based stepper configuration with pncconf,
the computer crashes during startup of linuxcnc and requires
power cycling.
Kernel: 3.4-9-rtai-686-pae
Distro: Debian 7.11 (wheezy)
If I do a "test axis" during pncconf, I get this error:
Traceback (most recent call last):
File "/home/engrtech/linuxcnc-dev/lib/python/pncconf/pages.py", line 1129, in
on_zaxistune_clicked
def on_zaxistune_clicked(self, *args): self.t.tune_axis('z')
File "/home/engrtech/linuxcnc-dev/lib/python/pncconf/tests.py", line 463, in t
une_axis
if not self.a.check_for_rt():
File "/home/engrtech/linuxcnc-dev/bin/pncconf", line 1640, in check_for_rt
elif hal.is_rt and not hal.kernel_version == actual_kernel:
AttributeError: 'module' object has no attribute 'kernel_version'
When I actually run linuxcnc from the configuration made by pncconf,
I get a kernel panic:
BUG: unable to handle kernel NULL pointer dereference at 0508
IP: [] handle_lxrt_request+0x58/0xaf0 [rtai_sched]
*pde =
Oops: [#1] PREEMPT SMP
followed by more stack trace stuff.
Linux 2.7.8 with hostmot2 runs fine, as does 2.8.0-pre1 with software stepgen.
Is this a problem of my making (and hence my solving), or is it a bug? I'm
wondering why I see mention of PREEMPT in the kernel panic when I am
running an RTAI kernel. Do I need to compile 2.8.0-pre1 differently?
Thanks,
-- Ralph
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Re: [Emc-users] crashing under 2.8.0-pre1
I have successfully used 2.8.0-pre1 for quite a long time.
On Wed, 10 May 2017 18:16:48 +
Ralph Stirling wrote:
> I have compiled 2.8.0-pre1 from source for a non-trivkins
> project. I am using a Mesa 7I43 board. When I run linuxcnc
> with software stepgens (no hostmot2), all is well. If I create
> a plain-vanilla Mesa-based stepper configuration with pncconf,
> the computer crashes during startup of linuxcnc and requires
> power cycling.
>
> Kernel: 3.4-9-rtai-686-pae
> Distro: Debian 7.11 (wheezy)
>
> If I do a "test axis" during pncconf, I get this error:
>
> Traceback (most recent call last):
> File "/home/engrtech/linuxcnc-dev/lib/python/pncconf/pages.py", line 1129,
> in
> on_zaxistune_clicked
> def on_zaxistune_clicked(self, *args): self.t.tune_axis('z')
> File "/home/engrtech/linuxcnc-dev/lib/python/pncconf/tests.py", line 463,
> in t
> une_axis
> if not self.a.check_for_rt():
> File "/home/engrtech/linuxcnc-dev/bin/pncconf", line 1640, in check_for_rt
> elif hal.is_rt and not hal.kernel_version == actual_kernel:
> AttributeError: 'module' object has no attribute 'kernel_version'
>
> When I actually run linuxcnc from the configuration made by pncconf,
> I get a kernel panic:
>
> BUG: unable to handle kernel NULL pointer dereference at 0508
> IP: [] handle_lxrt_request+0x58/0xaf0 [rtai_sched]
> *pde =
> Oops: [#1] PREEMPT SMP
>
> followed by more stack trace stuff.
>
> Linux 2.7.8 with hostmot2 runs fine, as does 2.8.0-pre1 with software stepgen.
> Is this a problem of my making (and hence my solving), or is it a bug? I'm
> wondering why I see mention of PREEMPT in the kernel panic when I am
> running an RTAI kernel. Do I need to compile 2.8.0-pre1 differently?
>
> Thanks,
> -- Ralph
> --
> Check out the vibrant tech community on one of the world's most
> engaging tech sites, Slashdot.org! http://sdm.link/slashdot
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Re: [Emc-users] crashing under 2.8.0-pre1
On 05/10/2017 12:16 PM, Ralph Stirling wrote:
> I have compiled 2.8.0-pre1 from source for a non-trivkins
> project. I am using a Mesa 7I43 board. When I run linuxcnc
> with software stepgens (no hostmot2), all is well. If I create
> a plain-vanilla Mesa-based stepper configuration with pncconf,
> the computer crashes during startup of linuxcnc and requires
> power cycling.
>
> Kernel: 3.4-9-rtai-686-pae
> Distro: Debian 7.11 (wheezy)
>
> If I do a "test axis" during pncconf, I get this error:
>
> Traceback (most recent call last):
> File "/home/engrtech/linuxcnc-dev/lib/python/pncconf/pages.py", line 1129,
> in
> on_zaxistune_clicked
> def on_zaxistune_clicked(self, *args): self.t.tune_axis('z')
> File "/home/engrtech/linuxcnc-dev/lib/python/pncconf/tests.py", line 463,
> in t
> une_axis
> if not self.a.check_for_rt():
> File "/home/engrtech/linuxcnc-dev/bin/pncconf", line 1640, in check_for_rt
> elif hal.is_rt and not hal.kernel_version == actual_kernel:
> AttributeError: 'module' object has no attribute 'kernel_version'
>
> When I actually run linuxcnc from the configuration made by pncconf,
> I get a kernel panic:
>
> BUG: unable to handle kernel NULL pointer dereference at 0508
> IP: [] handle_lxrt_request+0x58/0xaf0 [rtai_sched]
> *pde =
> Oops: [#1] PREEMPT SMP
>
> followed by more stack trace stuff.
Looks like you built linuxcnc from source and configured
--with-realtime=uspace instead of
--with-realtime=/usr/realtime-3.4-9-rtai-686-pae.
I'm able to reproduce the "no attribute 'kernel_version'" by configuring
for uspace, but I don't have a 7i43 hooked up at the moment and without
it I'm not able to reproduce the crash.
> Linux 2.7.8 with hostmot2 runs fine, as does 2.8.0-pre1 with software stepgen.
> Is this a problem of my making (and hence my solving), or is it a bug? I'm
> wondering why I see mention of PREEMPT in the kernel panic when I am
> running an RTAI kernel. Do I need to compile 2.8.0-pre1 differently?
Our 3.4-9-rtai-686-pae RTAI kernel has the normal Linux PREEMPT feature
enabled (this is different than the RT-PREEMPT feature, and not as
realtimey), in addition to the RTAI feature.
--
Sebastian Kuzminsky
--
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Re: [Emc-users] crashing under 2.8.0-pre1
Thanks, Sebastian. That configure option did it. I didn't
realize it was defaulting to uspace.
Now I can debug the kins. Rtapi_print is giving me some
strange formatting.
-- Ralph
From: Sebastian Kuzminsky [s...@highlab.com]
Sent: Wednesday, May 10, 2017 12:54 PM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] crashing under 2.8.0-pre1
On 05/10/2017 12:16 PM, Ralph Stirling wrote:
> I have compiled 2.8.0-pre1 from source for a non-trivkins
> project. I am using a Mesa 7I43 board. When I run linuxcnc
> with software stepgens (no hostmot2), all is well. If I create
> a plain-vanilla Mesa-based stepper configuration with pncconf,
> the computer crashes during startup of linuxcnc and requires
> power cycling.
>
> Kernel: 3.4-9-rtai-686-pae
> Distro: Debian 7.11 (wheezy)
>
> If I do a "test axis" during pncconf, I get this error:
>
> Traceback (most recent call last):
> File "/home/engrtech/linuxcnc-dev/lib/python/pncconf/pages.py", line 1129,
> in
> on_zaxistune_clicked
> def on_zaxistune_clicked(self, *args): self.t.tune_axis('z')
> File "/home/engrtech/linuxcnc-dev/lib/python/pncconf/tests.py", line 463,
> in t
> une_axis
> if not self.a.check_for_rt():
> File "/home/engrtech/linuxcnc-dev/bin/pncconf", line 1640, in check_for_rt
> elif hal.is_rt and not hal.kernel_version == actual_kernel:
> AttributeError: 'module' object has no attribute 'kernel_version'
>
> When I actually run linuxcnc from the configuration made by pncconf,
> I get a kernel panic:
>
> BUG: unable to handle kernel NULL pointer dereference at 0508
> IP: [] handle_lxrt_request+0x58/0xaf0 [rtai_sched]
> *pde =
> Oops: [#1] PREEMPT SMP
>
> followed by more stack trace stuff.
Looks like you built linuxcnc from source and configured
--with-realtime=uspace instead of
--with-realtime=/usr/realtime-3.4-9-rtai-686-pae.
I'm able to reproduce the "no attribute 'kernel_version'" by configuring
for uspace, but I don't have a 7i43 hooked up at the moment and without
it I'm not able to reproduce the crash.
> Linux 2.7.8 with hostmot2 runs fine, as does 2.8.0-pre1 with software stepgen.
> Is this a problem of my making (and hence my solving), or is it a bug? I'm
> wondering why I see mention of PREEMPT in the kernel panic when I am
> running an RTAI kernel. Do I need to compile 2.8.0-pre1 differently?
Our 3.4-9-rtai-686-pae RTAI kernel has the normal Linux PREEMPT feature
enabled (this is different than the RT-PREEMPT feature, and not as
realtimey), in addition to the RTAI feature.
--
Sebastian Kuzminsky
--
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Re: [Emc-users] crashing under 2.8.0-pre1
On 11 May 2017 at 03:34, Ralph Stirling wrote: > > Now I can debug the kins. Rtapi_print is giving me some > strange formatting. rtapi_print can't print floats. You get a weird hex-float. The solution might be to multiply by 1000 and print as an integer. (or even format with a decimal point in the format string and two integers) -- atp "A motorcycle is a bicycle with a pandemonium attachment and is designed for the especial use of mechanical geniuses, daredevils and lunatics." — George Fitch, Atlanta Constitution Newspaper, 1916 -- Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
