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Repeated Reboots when starting an activity - Highly Frustrating

I have encountered a major issue when using the Garmin 945 apparently with the Stryd running power sensor (Summit version - i.e. the latest version before the newly announced one)

This past weekend I was in Portland Oregon on a vacation trip. Greatly looking forward to doing some running on trails around Mount Hood, I had prepared accordingly (researching trail routes, creating courses on Garmin, packing for super long runs, etc) but I encountered issues with my watch that dampened the entire experience.

I think I have narrowed down the culprit as the Stryd sensor connection.

Friday morning, I traveled up to about 2000’ altitude anticipating a 13m round trip to 6600’+ and back down again. I had connected to GPS a few times in the day prior to make sure my Garmin wasn’t going to have difficulty in locating my position since I was 2000 miles from my home area. Everything was working fine…until i got to the trail head trying to start my run.

That’s when my watch repeatedly rebooted every time I tried to enter an activity mode (running, trail running, etc). When I would just press the activity button, it would show the screen briefly and then reboot. This happened over and over again for 30min. It would sometimes give me hope and stay connected for 10 sec, only to reboot.

FINALLY, I managed to leverage one of those 10sec periods to change the activity profile to “walk” instead of run. This didn’t have all my data fields that I like to use, much less all my sensors (including Stryd) but it would at least record a GPS track for the run. This worked okay, allowing me to record the 3 hour 30min + activity. I changed it back to “run” in Garmin Connect post run, but again, no stryd metrics etc.

The next morning, in downtown Portland, I went for a run in Forest Park. Trail running activity worked fine, no issues whatsoever. Just an aberration I thought.

But then the next day I went back up to the Mt Hood area to attempt another long 3+ hour run. Same deal as before, I had made all the proper preparations. Again unfortunately the same deal. Catastrophic failures and reboots. I couldn’t even get to the Walk activity this time to change it. I finally just gave up and borrowed my wife’s low level Garmin so I could at least tell my time/distance. About a mile into the run, I managed to get my 945 to drop all sensors and remove the Stryd CIQ Power field from the display.

This did the trick, the Garmin worked fine after that.

Remembering back a month, this happened before, again when I was in the mountains and starting a long trail run. Stryd totally hosed the activity, the 945 only working after it “forced” the Stryd CIQ field to drop out of the activity I was using.  A few weeks later, back in the mountains, it managed one activity just fine but then a later activity that same day it did the same thing - rebooting and forcing the Stryd CIQ field to drop out (along with the "Dozen Run" CIQ field I use as well).

Now back home, all is good with the 945 and stryd…absolutely no issues connecting/displaying etc.

So something appears to be happening either when my device is a) far from home…and/or b) at a far different elevation/altitude than it is used to.

As you might imagine, this was BEYOND frustrating. I was on a tight time schedule and this cost me 30 minutes in both instances fiddling with devices that I finally wanted to run over with my car.

Any ideas/suggestions/thoughts on what is happening between the watch in these instances??

  • Thanks for chiming in both of you.  If not related to Stryd then it's just coincidence that mine started working after I dropped the Stryd (and all other sensors).

    So altitude seems to be the issue.  I'm wondering if it is getting borked when it tries to adjust the altimeter for current altitude based on GPS?

  • You'd be well advised to do so.  I was so mad at my 945 I really wanted to take a rock and smash it.  I had everything planned for these runs (hydration vest, nutrition, maps, digital map course on the device itself, etc).  Spending 30min constantly rebooting the watch was frustrating to say the least.

  • This also happened to me, but mid-run. I regularly run between sea level and 5k', but over the weekend I ran from 2k' up to 6k' (also on Mt Hood), and during a pause right when I reached 6k' my 935 crashed (showed a garmin triangle logo for around ten minutes and didn't respond to buttons other than by beeping). When it came back, the stryd connectIQ data field was missing from my run screen, but my 935 didn't lose the 37mi of data it had stored up to that point happily.  I don't know if this was a stryd bug or a garmin bug.

  • I don't have stryd, but happened to me too...here's the post from me

    forums.garmin.com/.../unexpected-restarts-during-activity-start

  • Thanks.  Seems to have something to do with altitude adjustments at GPS acquisition.  Would be nice to get a comment from someone at Garmin that it's being looked into.

  • Thanks.  I read your post, that sounds like the same issue I experienced.  Next time I am going to fiddle with the altitude adjustment setttings and turn them off or manual only and see if that helps.  Would be nice to get a comment from someone at Garmin about this.

  • Here is the 945 manual, specifically the page on the Altimeter.

    www8.garmin.com/.../GUID-2DF9C415-2A35-48CE-B20B-013DAA3358A5.html

    There is a description for calibrating the Altimeter, but nothing about "Not during activity" separate setting which has a toggle for "on" vs "off."  What does this setting do?  If "on" means it does NOT re-calibrate during activity then that is a strange way to state it semantically.

  • Former Member
    0 Former Member over 5 years ago in reply to badbri

    With auto calibration on, the watch calibrates during your activities. When Not During Activity is turned on the watch will calibrate outside an activity. Mine seems to do this every morning. 

  • Thanks.  Some good info over in the Stryd forum on this topic as well.

  • Former Member
    0 Former Member over 5 years ago in reply to badbri

    I remember readings this somewhere, but now I can't find it.  Garmin is infamous for not explaining a lot of their functions.  I looked at the Stryd forum, but I must be looking in the wrong spot.  Can you post a link to the thread?