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[03:19:03] <KimK> I was asking this Q in #linuxcnc, but then I thought maybe I should ask here too, so here's a paste:
[03:19:21] <KimK> Where do we currently stand on the 12.04 no-real-time-kernel-yet situation, are there any preliminary kernels available to test?
[03:19:59] <KimK> I tried to install 10.04 (32) on my E350N, but it didn't like my 1920x1080 HDMI display (it picks 1280x1024, non-native, blurry). I tried 13.04, display good. Went back to 10.04 (64), display bad. Tried 12.04, display good. So it seems I must now make the jump to 12.04, but I want real-time, and I am seeking advice.
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[14:36:48] <andypugh> https://plus.google.com/u/0/108164504656404380542/posts
[14:37:03] <andypugh> That does not match the published behaviour.
[14:42:39] <andypugh> Gah! Why can't I share individual photos by link?
[14:43:50] <andypugh> Ah here a link to the actual photo
[14:43:51] <andypugh> https://picasaweb.google.com/lh/photo/nTHztK6a02lwmvdgiCxV99MTjNZETYmyPJy0liipFm0?feat=directlink
[14:44:42] <andypugh> I don't think that halui.estop.is-activated should be true and iocontrol.0.user-enable-out should also be true.
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[17:05:26] <jepler> andypugh: user-enable-out is true when the user has requested to leave estop. It doesn't guarantee to leave estop if there's an external condition preventing it.
[17:05:59] <jepler> andypugh: so in e.g., sim/axis it is instant to leave estop when user-enable-out rises, because it's looped back to iocontrol.0.emc-enable-in (oops branding)
[17:06:32] <jepler> if you unhook the loop and then press F1 in the GUI you'll see iocontrol.0.user-enable-out TRUE and halui.estop.is-activated TRUE
[17:06:55] <jepler> I think that it's closer to correct to say that halui.estop.is-activated tracks NOT iocontrol.0.emc-enable-in
[17:08:00] <jepler> (that NOT meaning it's the inverse of)
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[20:23:38] <KimK> andypugh: jepler: I have thought that there was something a little strange about our e-stop for a long time, particularly as usually implemented with F1, but have never stopped to put my finger on it. But what I think should happen is like one mfgr's e-stop knob (red mushroom) I saw once...
[20:23:51] <KimK> ...It had three positions, momentary out to close "start" contact, center position, and momentary in (or locking in, two versions available) to open e-stop string contact. But the three positions are difficult to obtain by toggling F1, so I think we must be doing some kind of edge-triggered one-shot or something?
[20:23:56] <KimK> Anyway, I'm glad you're looking into this Andy, please keep us (or me at least) posted on what you discover.
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[20:31:51] <skunkworks> the estop on the k&t works the way that I would want it to.. Any estop/limit/whatever kills machine - the estop on axis is the only one that will bring linuxcnc out of estop.
[20:33:40] <KimK> Hi Sam, good to hear from you. That's reassuring. So the F1 only affects LinuxCNC (and it's entry in the physical e-stop string?)
[20:33:58] <KimK> s/it's/its/
[20:37:14] <skunkworks> KimK: I am using rung 4
[20:37:16] <skunkworks> http://wiki.linuxcnc.org/cgi-bin/wiki.pl?Sample_HAL_And_ClassicLadder
[20:37:44] <skunkworks> There is a estop hal componant now which seems to do the same thing.
[20:38:05] <skunkworks> KimK: fun to see you again at wichita.
[20:38:16] <skunkworks> * it will be..
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[20:38:52] <KimK> skunkworks: BTW, on another subject, do you have any advice for me on preliminary 12.04 kernels to test? My E350N doesn't like my 1920x1080 HDMI display on 10.04 (32 or 64), but 12.04 and up auto-select it just fine. So it appears I must move to 12.04 on it, and I'm looking for advice.
[20:39:28] <KimK> I need real-time, hostmot2, etc.
[20:41:13] <KimK> Thanks for the link and tip, I'll look them over.
[20:41:54] <mhaberler> jepler: I need to stalk you a bit..
[20:42:08] <skunkworks> KimK:
http://wiki.linuxcnc.org/cgi-bin/wiki.pl?NewRTInstall
[20:42:21] <mhaberler> first I was supposed to bug you about the rtapi headers branch, which I herewith do
[20:42:58] <skunkworks> KimK: mhaberler has run hostmot2 on this install
[20:43:46] <skunkworks> KimK: I have only played with it - no real hardware.
[20:43:49] <mhaberler> kimk: you need the firmware for the display hw, then its fine
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[20:44:40] <KimK> skunkworks: Great, thanks, that looks like exactly what I need, I'll try it this evening.
[20:44:59] <mhaberler> btw it's not 'must move to 12.04', its 'you may now move to 12.04'…;)
[20:46:06] <skunkworks> mhaberler: so - you are saying that kim should be able to get the video working on 10.04?
[20:46:18] <mhaberler> jepler: second, I'd ask you to look over this commit: gcc intrinsics for atomic ops:
http://comments.gmane.org/gmane.linux.distributions.emc.devel/9654
[20:46:38] <mhaberler> I have it working fine on any kernel, rtai, xenomai, vanilla
[20:46:49] <mhaberler> its been asked ca 1000 times, very easy to google
[20:47:02] <mhaberler> basically you need some firmware for the radeon hw
[20:47:19] <KimK> mhaberler: firmware for the display hw? You mean I must use a supported graphics card? Yeah, that's a problem here, I have only one PCI slot and I need it for Mesa. I have 10.04 on my desktop running 1920x1080, but it's a separate CPU and motherboard graphics chips, the E350N is some kind of all-in-one deal
[20:47:27] <mhaberler> yes
[20:48:43] <KimK> I was able to get 10.04 to work on 1920x1080 but thoe same tricks didn't work on the E350N... "...they've adapted!"
[20:49:02] <mhaberler> http://phoronix.com/forums/showthread.php?41135-Mandatory-component-for-Radeon-driver-on-zacate-e350
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[20:52:09] <KimK> Yikes, what a goober. At least 12.04 works automatically, will that be sufficient, or will I lose that when building?
[20:55:39] <KimK> At least I'll end up with a different display system to try FreeCAD on, and see if the "white boxes" goes away. In a sketch, the entered value in a dimension constraint shows up in (or covered by?) a white box, so you can't read the value. It's not a big problem, you can read the value elsewhere, but it is annoying. I'll be glad if it goes away.
[20:56:10] <KimK> s/"white boxes"/"white boxes problem"/
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[20:58:50] <KimK> OK, mhaberler , thanks, skunkworks , thanks. I'll try your suggestions this evening.
[20:58:56] <KimK> Oops, too late.
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[21:59:26] <jepler> mhaberler: my gcc (4.7.2-5 on debian wheezy) documentation calls __sync_fetch_xxx as "legacy" :-/ and the following section in the docs describes other primitives aligned to c++11 with names like __atomic_fetch_or
[21:59:46] <mhaberler> ah, thanks
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[22:01:30] <mhaberler> I'll switch and see what the hardy compile does
[22:02:23] <jepler> you mix longs and ints in __constant_test_bit: 1UL as an integer constant but you cast the memory to const volatile unsigned int
[22:03:22] <mhaberler> ok
[22:03:56] <jepler> you define smp_mb__before_clear_bit but don't use it. I see some references to it in master but only in a comment. is it needed?
[22:04:32] <jepler> and/or does this mean our uses of clear_bit are wrong?
[22:05:50] <jepler> I see it does assemble to something on x86 and x86_64 (mfence if it's in the instruction set)
[22:06:02] <mhaberler> not yet in there, that slipped over from my development branch
[22:06:11] <jepler> (and some lock nop instruction if not)
[22:06:13] <mhaberler> will need it for the generalized ringbuffer code
[22:06:16] <jepler> ok
[22:07:07] <mhaberler> (motion is already partially running over it, and taking protobuf encoded commands - the shared memory comms will be history soon)
[22:07:19] <jepler> in __test_bit you use an unsigned int. I think shifting the int 1 by 31 bits (i.e., trying to place the 1 in the sign bit) is undefined in C
[22:07:48] <jepler> and besides that accident I don't yet see where the const and non-const versions will be different
[22:08:27] <jepler> by having the shift of 5 hardcoded, you do assume sizeof(int) is 4, which is unlikely to be wrong, but ...
[22:08:53] <jepler> in general I think it's nice to ditch any legasy asm we can and I'm in favor of it
[22:09:20] <jepler> life is calling, I know I still owe you rtapi_pci :-/
[22:09:25] <jepler> see you
[22:09:26] <mhaberler> sure
[22:09:30] <mhaberler> thanks a lot!
[22:09:44] <jepler> anyway, master branch or wait for rtos integration would be my thought on "where"
[22:10:00] <jepler> but it looks standalone enough to go to master at pretty much any time
[22:10:38] <mhaberler> I think it's the only essential restriction for compiling on non-x86 except for drivers of course
[22:10:58] <mhaberler> thats why I though I'd slip that in earlier
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