alpinelinux UART serial - broken rendering

[coelner]

Describe the bug

rpi_zero:~# gpg-tui 
failed to initialize clipboard: XcbConn(ClosedParseErr)
[Nothing is shown - q closes program]

To Reproduce

run gpg-tui over the UART serial on the alpine linux version on a rpi zero.

Expected behavior

the same output after running it under tmux.

Screenshots/Logs

If applicable, add screenshots or logs to help explain your problem.

System Information

• OS: [ alpine-rpi-3.14.0 210615]
• Rust Version: [rustc 1.47.0]
• GPGME version: [ gpgme-tool 1.15.1]
• GPGME engine version: [gpg (GnuPG) 2.2.29]
• Project Version: [e.g. 0.6.0-r0 edge repo]

Additional context

I run this on a rpi zero over the UART serial. Using tmux it works and the keys get shown.
tmux env:

TMUX=/tmp/tmux-0/default,4188,0
USER=root
SHLVL=2
HOME=/root
TERM_PROGRAM_VERSION=3.2
PAGER=less
PS1=\h:\w\$ 
LOGNAME=root
TERM=screen
LC_COLLATE=C
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/root/.local/bin
LANG=C.UTF-8
TERM_PROGRAM=tmux
SHELL=/bin/ash
PWD=/root
CHARSET=UTF-8
TMUX_PANE=%0

env for the UART shell:

USER=root
SHLVL=1
HOME=/root
PAGER=less
PS1=\h:\w\$ 
LOGNAME=root
TERM=vt100
LC_COLLATE=C
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/root/.local/bin
LANG=C.UTF-8
SHELL=/bin/ash
PWD=/root
CHARSET=UTF-8

[orhun]

failed to initialize clipboard: XcbConn(ClosedParseErr)

FYI this is normal for non-X11 environments, since copy/paste feature requires X11.

[Nothing is shown - q closes program]

Can you press '?' and share what's shown the bottom right? It seems like $GNUPGHOME is not set (or set to somewhere else) so the keyring is empty. For example:

Also you can compare these values to your working environment. I'm not familiar with the UART serial so I think it's a (shared) keyring problem.

---

Are you having any other problems about the rendering? Are the other keys work normally or is it completely broken?

[coelner]

failed to initialize clipboard: XcbConn(ClosedParseErr)

• FYI this is normal for non-X11 environments, since copy/paste feature requires X11.

GPGME version: 1.15.1                 │
│    └─switch to normal mode          │  GPGME protocol: OpenPGP               │
│                                     │  GPGME engine: "/usr/bin/gpg"          │
│                                     │  GPGME engine version: 2.2.29 (>1.4.0) │
│                                     │  GnuPG home directory: "/root/.gnupg"  │
│ Use arrow keys / hjkl to navigate   │  GnuPG data directory:                 │
│ through the key bindings.           │  "/usr/share/gnupg"                    │
│ Corresponding commands and          │  Output directory: "/root/.gnupg/out"  │
│ additional information will be shown│  Default signing key: not specified   

the $GNUPGHOME is not set, but it does not change anything.

I get a blank screen with the direct call within ash, but after calling tmux the output is visible.Both is about the serial connection.

Due the missing clipboard the I/O is limited (maybe there a way to paste it into the shell buffer/ or disable the menu items)

[orhun]

Hmm it's weird. I don't really have the environment to reproduce this issue but feel free to guide me.

I get a blank screen with the direct call within ash, but after calling tmux the output is visible.Both is about the serial connection.

I wonder what does tmux do differently.

I'll research a little bit. It'd be good if you let me know if anything changes.

[coelner]

No problem, I was just stumpling over this.
[background: the rpi should be a air gap gnupg key generator and master key storage]