Ctrl+S causing freeze

[shahmili]

Super excited that my daughter and I built a Zero Writer. Unfortunately, every time we try to save it freezes the system :( Any suggestions? Thanks!

[zerowriter]

Hello! Are you able to post the trace or error from terminal?

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On Sat, Dec 14, 2024 at 12:47 PM shahmili ***@***.***> wrote: Super excited that my daughter and I built a Zero Writer. Unfortunately, every time we try to save it freezes the system :( Any suggestions? Thanks! — Reply to this email directly, view it on GitHub <#28>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/BEN2POTG2LWMDUZC4AS7XH32FRVMBAVCNFSM6AAAAABTTXFI5CVHI2DSMVQWIX3LMV43ASLTON2WKOZSG42DAMBSGIZTIMQ> . You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[shahmili]

I just ssh'd and it states:
client_loop: send disconnect: Broken pipe

[zerowriter]

hi, if you are getting broken pipe messages it probably means SSH isn’t being reliable. I would suggest connecting your pi to a display via HDMI so you can see what the error could be. Just so I can help further.. is this for the 2.2 branch (new displays, has menu functions) or the main branch (old displays)? The program freezes / crashes when saving only (ctrl+s)? it writes a cache file automatically — does the cache file persist / does your text hang around (when you reboot the zerowriter?)

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On Sat, Dec 14, 2024 at 12:57 PM shahmili ***@***.***> wrote: I just ssh'd and it states: client_loop: send disconnect: Broken pipe — Reply to this email directly, view it on GitHub <#28 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/BEN2PORSRMCLVFBFESOANPL2FRWRRAVCNFSM6AAAAABTTXFI5CVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDKNBTGIYTAMBSGY> . You are receiving this because you commented.Message ID: ***@***.***>

[digitalsucks]

Just wanted to jump in on this comment, as I experience a crash when using Ctrl+S as well. It does save a cache file, in my case, but requires a reboot to get rid of the frozen screen. Using the "Save As" command from the menu does not freeze however.

[zerowriter]

Thanks! Hm. I'll dig into this project again soon (I'm developing something raspberry pi related), but Save As is a good temporary workaround..

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On Thu, Oct 9, 2025 at 1:16 PM Jocelyn ***@***.***> wrote: *digitalsucks* left a comment (zerowriter/zerowriter1#28) <#28 (comment)> Just wanted to jump in on this comment, as I experience a crash when using Ctrl+S as well. It does save a cache file, in my case, but requires a reboot to get rid of the frozen screen. Using the "Save As" command from the menu does not freeze however. — Reply to this email directly, view it on GitHub <#28 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/BEN2POQNGW3JGPXZXF2S2NL3W2J55AVCNFSM6AAAAABTTXFI5CVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTGOBWHAZDEMJZGY> . You are receiving this because you commented.Message ID: ***@***.***>

[trentgarlipp]

I've been having this same problem and I finally figured out what's going on!

There's already a hotkey for CTRL-S in the version of Debian Bookworm recommended in the install guide I think. It pauses (stops) the code that's currently running until you press CTRL-Q and then it resumes the code.

If you want to get rid of that hotkey you can do this:

Edit your startup bash file
sudo nano ~/.bashrc

and add this line before the lines that run the zerowriter python script
stty stop undef

So the bottom of the file should look something like this:

stty stop undef
cd zerowriter1/e-Paper/RaspberryPi_JetsonNano/python/examples/
sudo python main.py