Nevermind that, I just forgot to remove my override file that set TERM=linux for serial-getty@ttyS0.
Daan On Sat, 11 Jul 2020 at 20:31, Daan De Meyer <daan.j.deme...@gmail.com> wrote: > > TERM=linux means Linux console, but that's just too much, as it not > > only implies a multitude of ESC sequences specific to the Linux > > console, but also indicates that certain ioctls might work. In our own > > code we also bind certain behaviour to TERM=linux, as indicator if we > > are on the Linux console. > > > > I am not aware of any widely-supported TERM value that would be a > > reasonable subset of all currently used terminals and does color. > > I did some more research and it turns out VT220 does support colors. My > terminal emulator (Konsole) just doesn't seem to support it. I installed > xterm (which explicitly advertises support for VT220 escape codes) and got > colored output as expected. I guess this means it's up to Konsole to > support more of VT220 if I want this to work seamlessly (or I switch > terminals to xterm). > > Thanks for the extra info and context. > > Daan > > On Sat, 11 Jul 2020 at 20:04, Lennart Poettering <lenn...@poettering.net> > wrote: > >> On Sa, 11.07.20 17:51, Daan De Meyer (daan.j.deme...@gmail.com) wrote: >> >> > Hi, >> > >> > I was playing around with mkosi's qemu support, more specifically adding >> > the -nographic option to have the virtual machine output in my terminal >> > instead of a separate window. After figuring out that I had to add >> > console=ttyS0 to mkosi's kernel command line, I got the output from the >> vm >> > in my terminal as expected. However, because systemd defaults to >> TERM=vt220 >> > for serial consoles, the output is not colorized. I searched around a >> bit >> > and found that this is done for compatibility reasons. Will there ever >> be a >> > point where we can switch the default to something that supports colors >> > (like TERM=linux)? >> >> TERM=linux means Linux console, but that's just too much, as it not >> only implies a multitude of ESC sequences specific to the Linux >> console, but also indicates that certain ioctls might work. In our own >> code we also bind certain behaviour to TERM=linux, as indicator if we >> are on the Linux console. >> >> I am not aware of any widely-supported TERM value that would be a >> reasonable subset of all currently used terminals and does color. >> >> > I managed to get around the problem by overriding serial-getty@ttyS0 >> and >> > setting Environment=TERM=linux explicitly but it's a bit of a pain and >> has >> > to be added to every rootfs that wants to support colored output on its >> > serial console. >> >> Unfortunately we can't guess the right terminal, we cannot propagate >> TERM=xterm or TERM=linux depending if you invoke qemu on an xterm or >> from a Linux console, hence the best thing we can do is stick to a >> reasonably powerful subset that is likely going to exist everywhere, >> and that's vt220 right now, as noone had a better suggestion so far... >> >> Lennart >> >> -- >> Lennart Poettering, Berlin >> >
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