[systemd-bugs] [Bug 54062] journalctl --setup-keys prints unreadable QR code in wide CJK mode

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=54062

--- Comment #2 from Christian Persch (GNOME) <chpe at gnome.org> 2012-09-12 12:01:14 UTC ---
So the problem is actually more complex than I first thought:
* LANG=zh_CN.UTF-8 => works fine
* LANG=zh_CN.UTF-8 VTE_CJK_WIDTH=wide => fails
* LANG=zh_TW.BIG5 (or zh_CN.GBK, zh_CN.EUCCN etc) => fails dramatically

For the problem in the 3rd case, you can use the ISO 2022 sequence ESC %G to
switch to UTF-8 temporarily before starting the QR code, and then afterwards
use ESC %@ to switch back. With that, the QR code shows up fine. This works in
vte but not in urxvt, xterm or konsole (but doesn't make it any worse either).

Now for the 2nd case, this doesn't work because of the way VTE_CJK_WIDTH=wide
works; this may be a vte bug, not sure.

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