From: Alan W. <gy...@ya...> - 2005-06-04 03:43:19
|
The device freezes. On occasion it reboots itself, but usually it just locks up. It typically locks up before the 2000-th iteration. I'm going to try a plain vanilla arm_image now and see what happens. will let you guys know. __________________________________ Discover Yahoo! Get on-the-go sports scores, stock quotes, news and more. Check it out! http://discover.yahoo.com/mobile.html |
From: Alan W. <gy...@ya...> - 2005-06-05 01:57:02
|
A plain vanilla root image will lock up too. Sigh. I thought maybe it's my power adaptor, so I used one of those 2500mA universal AC/DC adaptors. On the 5v setting, this gumstix has the same locking behavior. Aww shucks. But if I change it use the 4.2V setting, it doesn't lock up anymore; at least it's been running for the last 20 minutes and I think it should work 'forever' now. Using a voltmeter (not terribly accurate analog voltmeter), the power adaptor from gumstix is 5V as printed, and the 5V on the universal is also 5V, and the 4.2V setting is about 4.2V. Does anyone have any thoughts on this? -Alan to reiterate, this is a 400mhz connex-xm with waysmall and etherstix connected. when running the c code the device typically feezes in less than 30 seconds. with c code is as follows (repeatedly generates the first 50000 fibonacci sequence numbers): ============= #include <stdio.h> int main(void) { int iter = 0; printf("starting C\n"); while(1) { iter += 1; printf("%d ", iter); fflush(stdout); { int fib = 0; int x1 = 1; int x2 = 1; int i; for (i = 0; i < 50000; i++) { fib = x1 + x2; x2 = x1; x1 = fib; /*printf("%d\n", fib);*/ } } } return 0; } --- Alan Wang <gy...@ya...> wrote: > The device freezes. On occasion it reboots itself, > but > usually it just locks up. It typically locks up > before > the 2000-th iteration. > > I'm going to try a plain vanilla arm_image now and > see > what happens. will let you guys know. > > > __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com |
From: Craig H. <cr...@gu...> - 2005-06-05 05:19:39
|
Alan, we are digging into this issue now. I've reproduced the problems on a handful of XM units. I'll take a look at what happens with varying voltages. C On Jun 4, 2005, at 6:56 PM, Alan Wang wrote: > A plain vanilla root image will lock up too. Sigh. > > I thought maybe it's my power adaptor, so I used one > of those 2500mA universal AC/DC adaptors. On the 5v > setting, this gumstix has the same locking behavior. > Aww shucks. > > But if I change it use the 4.2V setting, it doesn't > lock up anymore; at least it's been running for the > last 20 minutes and I think it should work 'forever' > now. > > Using a voltmeter (not terribly accurate analog > voltmeter), the power adaptor from gumstix is 5V as > printed, and the 5V on the universal is also 5V, and > the 4.2V setting is about 4.2V. > > Does anyone have any thoughts on this? > > -Alan > > > > to reiterate, this is a 400mhz connex-xm with waysmall > and etherstix connected. > > when running the c code the device typically feezes in > less than 30 seconds. > > with c code is as follows (repeatedly generates the > first 50000 fibonacci sequence numbers): > ============= > > #include <stdio.h> > > int main(void) { > int iter = 0; > printf("starting C\n"); > while(1) { > iter += 1; > printf("%d ", iter); > fflush(stdout); > { > int fib = 0; > int x1 = 1; > int x2 = 1; > int i; > for (i = 0; i < 50000; i++) { > fib = x1 + x2; > x2 = x1; > x1 = fib; > /*printf("%d\n", fib);*/ > } > } > } > return 0; > } > > --- Alan Wang <gy...@ya...> wrote: > > >> The device freezes. On occasion it reboots itself, >> but >> usually it just locks up. It typically locks up >> before >> the 2000-th iteration. >> >> I'm going to try a plain vanilla arm_image now and >> see >> what happens. will let you guys know. >> >> >> >> > > > > __________________________________________________ > Do You Yahoo!? > Tired of spam? Yahoo! Mail has the best spam protection around > http://mail.yahoo.com > > > ------------------------------------------------------- > This SF.Net email is sponsored by: NEC IT Guy Games. How far can > you shotput > a projector? How fast can you ride your desk chair down the office > luge track? > If you want to score the big prize, get to know the little guy. > Play to win an NEC 61" plasma display: http://www.necitguy.com/?r=20 > _______________________________________________ > gumstix-users mailing list > gum...@li... > https://lists.sourceforge.net/lists/listinfo/gumstix-users > |
From: Dave H. <dhy...@gm...> - 2005-06-05 05:27:07
|
Hi Alan, > But if I change it use the 4.2V setting, it doesn't > lock up anymore; at least it's been running for the > last 20 minutes and I think it should work 'forever' > now. >=20 > Using a voltmeter (not terribly accurate analog > voltmeter), the power adaptor from gumstix is 5V as > printed, and the 5V on the universal is also 5V, and > the 4.2V setting is about 4.2V. >=20 > Does anyone have any thoughts on this? It sounds like a power problem with the voltage regulator on the gumstix. I'm not sure what exactly is being used, but most modern voltage regulators have a thermal shutdown mode. Running the CPU at 100% will draw the most amount of current. The difference between the voltage being provided (5v) and that being consumed (3.3v) is wasted as heat in the voltage regulator. Dropping the voltage to 4.2v will reduce the thermal energy being dissipated. That's my hypothesis. --=20 Dave Hylands Vancouver, BC, Canada http://www.DaveHylands.com/ |
From: Craig H. <cr...@gu...> - 2005-06-06 16:02:36
|
We did an experiment with an XM-BT board which was failing regularly when connected to a cfstix and run at 100% cpu usage. We cut a hole in the cfstix board directly above the primary gumstix voltage regulator, and lo! the gumstix stops crashing (at least in limited testing). I think this is probably showing up with the XMs due to the increased power draw that the 128Mbit flash chip must have relative to the 32Mbit one on the non-XM boards. We'll do some more investigation into how to keep this regulator cooler -- whether the answer is better ventilation as in our cfstix test, or possibly some better conductive dissipation by adding some kind of heat sink. C On Jun 4, 2005, at 10:26 PM, Dave Hylands wrote: > Hi Alan, > > >> But if I change it use the 4.2V setting, it doesn't >> lock up anymore; at least it's been running for the >> last 20 minutes and I think it should work 'forever' >> now. >> >> Using a voltmeter (not terribly accurate analog >> voltmeter), the power adaptor from gumstix is 5V as >> printed, and the 5V on the universal is also 5V, and >> the 4.2V setting is about 4.2V. >> >> Does anyone have any thoughts on this? >> > > It sounds like a power problem with the voltage regulator on the > gumstix. I'm not sure what exactly is being used, but most modern > voltage regulators have a thermal shutdown mode. > > Running the CPU at 100% will draw the most amount of current. The > difference between the voltage being provided (5v) and that being > consumed (3.3v) is wasted as heat in the voltage regulator. Dropping > the voltage to 4.2v will reduce the thermal energy being dissipated. > > That's my hypothesis. > > -- > Dave Hylands > Vancouver, BC, Canada > http://www.DaveHylands.com/ > > > ------------------------------------------------------- > This SF.Net email is sponsored by: NEC IT Guy Games. How far can > you shotput > a projector? How fast can you ride your desk chair down the office > luge track? > If you want to score the big prize, get to know the little guy. > Play to win an NEC 61" plasma display: http://www.necitguy.com/?r > _______________________________________________ > gumstix-users mailing list > gum...@li... > https://lists.sourceforge.net/lists/listinfo/gumstix-users > |
From: Dave H. <dhy...@gm...> - 2005-06-06 16:21:10
|
Hi Craig, On 6/6/05, Craig Hughes <cr...@gu...> wrote: > We did an experiment with an XM-BT board which was failing regularly > when connected to a cfstix and run at 100% cpu usage. We cut a hole > in the cfstix board directly above the primary gumstix voltage > regulator, and lo! the gumstix stops crashing (at least in limited > testing). Can you post a picture of the XM board with the regulator highlighted? Thanks - I'll probably be preemptive and add more heatsinking to mine (or drill a hole on my cfstix). --=20 Dave Hylands Vancouver, BC, Canada http://www.DaveHylands.com/ |
From: Craig H. <cr...@gu...> - 2005-06-06 16:27:08
|
On Jun 6, 2005, at 9:20 AM, Dave Hylands wrote: > Hi Craig, > > On 6/6/05, Craig Hughes <cr...@gu...> wrote: > >> We did an experiment with an XM-BT board which was failing regularly >> when connected to a cfstix and run at 100% cpu usage. We cut a hole >> in the cfstix board directly above the primary gumstix voltage >> regulator, and lo! the gumstix stops crashing (at least in limited >> testing). >> > > Can you post a picture of the XM board with the regulator highlighted? > > Thanks - I'll probably be preemptive and add more heatsinking to mine > (or drill a hole on my cfstix). Will do, as soon as I get to gumHQ -- still sipping my coffee at the local coffee shop. C |
From: Craig H. <cr...@gu...> - 2005-06-06 17:20:29
|
On Jun 6, 2005, at 9:26 AM, Craig Hughes wrote: >> Can you post a picture of the XM board with the regulator >> highlighted? >> >> Thanks - I'll probably be preemptive and add more heatsinking to mine >> (or drill a hole on my cfstix). >> > > Will do, as soon as I get to gumHQ -- still sipping my coffee at > the local coffee shop. So it turns out we're pretty lucky -- on both the CFstix and the etherstix, there's no circuitry in the boards immediately above where the voltage regulator in question is. A quick hack (or the kind a hacksaw provides) and you get increased ventilation without cutting any traces. We're continuing testing now to see if the ventilation is sufficient, or if some kind of sinking is needed too. I'll do some testing at >5V just to stress the components a little more. Photos attached: |
From: Craig R H. <cr...@gu...> - 2005-06-06 21:02:01
|
Quick update, based on progress so far. We've gone through and tested all sort so combinations of boards here, and it looks like the ones which are overheating and failing are the ones we call "H" boards -- these are being sold as "G" or connex boards, but have an extra hole drilled on them, opposite the 92-pin connector. If you look between the RAM chips, you'll see "GUMSTIX #0.8" and then the hole. We've only done one manufacturing run which included "H" boards, which are all XM boards, some with and some without bluetooth. If you have received a G-XM board, then odds are good that you have an "H" board. These boards seem to be drawing about 0.2A more at 4.4V than otherwise identical non-H boards. Our working theory is that this is the problem, and not the voltage regulator that I sent pictures of earlier. We're trying to determine now which component is drawing the extra juice -- right now the best candidate is the IC labeled "LTNX" and is one cap away from the 60-pin connector. It gets noticeably warm to the touch quite rapidly when the CPU is loaded one those boards. The component is the LDO which supplies PLL and Vcc, so it is a good candidate. For now though, probably best not to cut holes in your board over the wrong component :) We'll keep you posted, C |
From: Craig H. <cr...@gu...> - 2005-06-06 22:00:27
|
...and connected to this LDO we just found that on the bad stix, the inductor is rotated 90 degrees from how it should have been placed, so it's acting as an R0 instead of an inductor! Removing it and soldering it with correct placement seems to have cut power consumption back to the expected range. We're going to do some more testing and then figure out how to deal with the fact that anyone out there with a connex-XM gumstix likely has this problem. Looks like we're going to have to recall those and send out replacements. Logisics for that TBD -- we'll figure it out and let you (and all those who've received these boards) know ASAP. C On Jun 6, 2005, at 2:01 PM, Craig R Hughes wrote: > Quick update, based on progress so far. We've gone through and > tested all sort > so combinations of boards here, and it looks like the ones which > are overheating > and failing are the ones we call "H" boards -- these are being sold > as "G" or > connex boards, but have an extra hole drilled on them, opposite the > 92-pin > connector. If you look between the RAM chips, you'll see "GUMSTIX > #0.8" and > then the hole. We've only done one manufacturing run which > included "H" boards, > which are all XM boards, some with and some without bluetooth. If > you have > received a G-XM board, then odds are good that you have an "H" > board. These > boards seem to be drawing about 0.2A more at 4.4V than otherwise > identical non-H > boards. Our working theory is that this is the problem, and not > the voltage > regulator that I sent pictures of earlier. We're trying to > determine now which > component is drawing the extra juice -- right now the best > candidate is the IC > labeled "LTNX" and is one cap away from the 60-pin connector. It gets > noticeably warm to the touch quite rapidly when the CPU is loaded > one those > boards. The component is the LDO which supplies PLL and Vcc, so it > is a good > candidate. > > For now though, probably best not to cut holes in your board over > the wrong > component :) > > We'll keep you posted, > > C > > > ------------------------------------------------------- > This SF.Net email is sponsored by: NEC IT Guy Games. How far can > you shotput > a projector? How fast can you ride your desk chair down the office > luge track? > If you want to score the big prize, get to know the little guy. > Play to win an NEC 61" plasma display: http://www.necitguy.com/?r=20 > _______________________________________________ > gumstix-users mailing list > gum...@li... > https://lists.sourceforge.net/lists/listinfo/gumstix-users > |
From: Alan W. <gy...@ya...> - 2005-06-07 00:16:26
|
Yay! Does this also fix the connex XM's with BT? -Alan --- Craig Hughes <cr...@gu...> wrote: > ...and connected to this LDO we just found that on > the bad stix, the > inductor is rotated 90 degrees from how it should > have been placed, > so it's acting as an R0 instead of an inductor! > Removing it and > soldering it with correct placement seems to have > cut power > consumption back to the expected range. We're going > to do some more > testing and then figure out how to deal with the > fact that anyone out > there with a connex-XM gumstix likely has this > problem. Looks like > we're going to have to recall those and send out > replacements. > Logisics for that TBD -- we'll figure it out and let > you (and all > those who've received these boards) know ASAP. > > C > > On Jun 6, 2005, at 2:01 PM, Craig R Hughes wrote: > > > Quick update, based on progress so far. We've > gone through and > > tested all sort > > so combinations of boards here, and it looks like > the ones which > > are overheating > > and failing are the ones we call "H" boards -- > these are being sold > > as "G" or > > connex boards, but have an extra hole drilled on > them, opposite the > > 92-pin > > connector. If you look between the RAM chips, > you'll see "GUMSTIX > > #0.8" and > > then the hole. We've only done one manufacturing > run which > > included "H" boards, > > which are all XM boards, some with and some > without bluetooth. If > > you have > > received a G-XM board, then odds are good that you > have an "H" > > board. These > > boards seem to be drawing about 0.2A more at 4.4V > than otherwise > > identical non-H > > boards. Our working theory is that this is the > problem, and not > > the voltage > > regulator that I sent pictures of earlier. We're > trying to > > determine now which > > component is drawing the extra juice -- right now > the best > > candidate is the IC > > labeled "LTNX" and is one cap away from the 60-pin > connector. It gets > > noticeably warm to the touch quite rapidly when > the CPU is loaded > > one those > > boards. The component is the LDO which supplies > PLL and Vcc, so it > > is a good > > candidate. > > > > For now though, probably best not to cut holes in > your board over > > the wrong > > component :) > > > > We'll keep you posted, > > > > C > > > > > > > ------------------------------------------------------- > > This SF.Net email is sponsored by: NEC IT Guy > Games. How far can > > you shotput > > a projector? How fast can you ride your desk chair > down the office > > luge track? > > If you want to score the big prize, get to know > the little guy. > > Play to win an NEC 61" plasma display: > http://www.necitguy.com/?r=20 > > _______________________________________________ > > gumstix-users mailing list > > gum...@li... > > > https://lists.sourceforge.net/lists/listinfo/gumstix-users > > > > > > ------------------------------------------------------- > This SF.Net email is sponsored by: NEC IT Guy Games. > How far can you shotput > a projector? How fast can you ride your desk chair > down the office luge track? > If you want to score the big prize, get to know the > little guy. > Play to win an NEC 61" plasma display: > http://www.necitguy.com/?r=20 > _______________________________________________ > gumstix-users mailing list > gum...@li... > https://lists.sourceforge.net/lists/listinfo/gumstix-users > __________________________________ Discover Yahoo! Use Yahoo! to plan a weekend, have fun online and more. Check it out! http://discover.yahoo.com/ |
From: Gordon K. <go...@gu...> - 2005-06-07 00:35:29
|
Yes, xmbt is working great [again... and so is the dual etherstix...] Thanks to everyone who helped us nail this one! Gordon >Yay! > >Does this also fix the connex XM's with BT? > >-Alan > > |
From: Craig H. <cr...@gu...> - 2005-06-07 01:13:27
|
Yes. C On Jun 6, 2005, at 5:16 PM, Alan Wang wrote: > Yay! > > Does this also fix the connex XM's with BT? > > -Alan > > > --- Craig Hughes <cr...@gu...> wrote: > > >> ...and connected to this LDO we just found that on >> the bad stix, the >> inductor is rotated 90 degrees from how it should >> have been placed, >> so it's acting as an R0 instead of an inductor! >> Removing it and >> soldering it with correct placement seems to have >> cut power >> consumption back to the expected range. We're going >> to do some more >> testing and then figure out how to deal with the >> fact that anyone out >> there with a connex-XM gumstix likely has this >> problem. Looks like >> we're going to have to recall those and send out >> replacements. >> Logisics for that TBD -- we'll figure it out and let >> you (and all >> those who've received these boards) know ASAP. >> >> C >> >> On Jun 6, 2005, at 2:01 PM, Craig R Hughes wrote: >> >> >>> Quick update, based on progress so far. We've >>> >> gone through and >> >>> tested all sort >>> so combinations of boards here, and it looks like >>> >> the ones which >> >>> are overheating >>> and failing are the ones we call "H" boards -- >>> >> these are being sold >> >>> as "G" or >>> connex boards, but have an extra hole drilled on >>> >> them, opposite the >> >>> 92-pin >>> connector. If you look between the RAM chips, >>> >> you'll see "GUMSTIX >> >>> #0.8" and >>> then the hole. We've only done one manufacturing >>> >> run which >> >>> included "H" boards, >>> which are all XM boards, some with and some >>> >> without bluetooth. If >> >>> you have >>> received a G-XM board, then odds are good that you >>> >> have an "H" >> >>> board. These >>> boards seem to be drawing about 0.2A more at 4.4V >>> >> than otherwise >> >>> identical non-H >>> boards. Our working theory is that this is the >>> >> problem, and not >> >>> the voltage >>> regulator that I sent pictures of earlier. We're >>> >> trying to >> >>> determine now which >>> component is drawing the extra juice -- right now >>> >> the best >> >>> candidate is the IC >>> labeled "LTNX" and is one cap away from the 60-pin >>> >> connector. It gets >> >>> noticeably warm to the touch quite rapidly when >>> >> the CPU is loaded >> >>> one those >>> boards. The component is the LDO which supplies >>> >> PLL and Vcc, so it >> >>> is a good >>> candidate. >>> >>> For now though, probably best not to cut holes in >>> >> your board over >> >>> the wrong >>> component :) >>> >>> We'll keep you posted, >>> >>> C >>> >>> >>> >>> >> >> > ------------------------------------------------------- > >>> This SF.Net email is sponsored by: NEC IT Guy >>> >> Games. How far can >> >>> you shotput >>> a projector? How fast can you ride your desk chair >>> >> down the office >> >>> luge track? >>> If you want to score the big prize, get to know >>> >> the little guy. >> >>> Play to win an NEC 61" plasma display: >>> >> http://www.necitguy.com/?r=20 >> >>> _______________________________________________ >>> gumstix-users mailing list >>> gum...@li... >>> >>> >> >> > https://lists.sourceforge.net/lists/listinfo/gumstix-users > >>> >>> >> >> >> >> >> > ------------------------------------------------------- > >> This SF.Net email is sponsored by: NEC IT Guy Games. >> How far can you shotput >> a projector? How fast can you ride your desk chair >> down the office luge track? >> If you want to score the big prize, get to know the >> little guy. >> Play to win an NEC 61" plasma display: >> http://www.necitguy.com/?r=20 >> _______________________________________________ >> gumstix-users mailing list >> gum...@li... >> >> > https://lists.sourceforge.net/lists/listinfo/gumstix-users > >> >> > > > > > __________________________________ > Discover Yahoo! > Use Yahoo! to plan a weekend, have fun online and more. Check it out! > http://discover.yahoo.com/ > > > ------------------------------------------------------- > This SF.Net email is sponsored by: NEC IT Guy Games. How far can > you shotput > a projector? How fast can you ride your desk chair down the office > luge track? > If you want to score the big prize, get to know the little guy. > Play to win an NEC 61" plasma display: http://www.necitguy.com/?r=20 > _______________________________________________ > gumstix-users mailing list > gum...@li... > https://lists.sourceforge.net/lists/listinfo/gumstix-users > |
From: Gordon K. <go...@gu...> - 2005-06-13 21:08:08
|
This is an update on our shipping the replacement connex 400 xm & connex-xm-bt boards. We had expected to be able to ship out replacements to everyone today; however, none of them have arrived here yet. I just confirmed that I will receive a shipment of approximately 1 quarter of the replacement connex 400 xm's and all the connex 400 xmbt's; these will ship as soon as we QA them. I will keep you posted on the status of the others. I apologize for the delay, Gordon > ...and connected to this LDO we just found that on the bad stix, the > inductor is rotated 90 degrees from how it should have been placed, > so it's acting as an R0 instead of an inductor! Removing it and > soldering it with correct placement seems to have cut power > consumption back to the expected range. We're going to do some more > testing and then figure out how to deal with the fact that anyone out > there with a connex-XM gumstix likely has this problem. Looks like > we're going to have to recall those and send out replacements. > Logisics for that TBD -- we'll figure it out and let you (and all > those who've received these boards) know ASAP. > > C > |
From: Gordon K. <go...@gu...> - 2005-06-14 19:53:04
|
Today's update: 1) All units have been finished. 2) Yesterday's shipment went via ground but will be here today nevertheless; however, to late in the day to say reliably that we will be able to start shipping out replacements today. 3) We will be able to QA overnight and start shipping these tomorrow morning. Gordon > This is an update on our shipping the replacement connex 400 xm & > connex-xm-bt boards. > > We had expected to be able to ship out replacements to everyone > today; however, none of them have arrived here yet. I just confirmed > that I will receive a shipment of approximately 1 quarter of the > replacement connex 400 xm's and all the connex 400 xmbt's; these will > ship as soon as we QA them. I will keep you posted on the status of > the others. > > I apologize for the delay, > > Gordon |