raspberrypi / raspberrypi/linux
/dev/pts/x x=0,1,2,3,4... can't send / received data in Pi 4B
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Description
/dev/pts/x x=0,1,2,3,4... can't send / received data in Pi 4B
use 4.19.50-v71 + #895 Jun 20 2019
same image for Pi3B/3B+ no problem, but Raspberry pi 4B can't send & received data
try sudo chmod 777 /dev/pts/x still the same .
try cat /dev/pts/x can't received data, try cutecom no data as well.
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reproducing bidirectional data transfer on a Raspberry Pi 4B using 4.19.50-v71 + #895, comparing /dev/pts/x behavior with a Pi 3B or 3B+. Check whether cat and CuteCom show the same failure; done means data can be sent and received through the affected pseudo-terminal devices.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- c, linux, raspberry-pi
- Domain
- embedded-iot, operating-systems
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100