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Bug#857132: console-setup: additional info needed ?

On Thu, Mar 23, 2017 at 10:58 AM, Anton Zinoviev <anton@lml.bas.bg> wrote:
> On Thu, Mar 23, 2017 at 02:37:48PM +0100, Michael Biebl wrote:
>> In Debian, we don't enable the systemd-vconsole component [1].
> This is good, but...
>> So there should be no console configuration happening from systemd's
>> side.
> ...suppose udev creates a new console.

As mentioned by Michael, this is not done by udev or systemd.

> Then it has to be initialized
> with some font, hasn't it?

When it is created, the udev rule should be fired. So
cached_setup_font.sh should be invoked again.

>  From my tests it seems that the font used
> for this initialization is the same as the font used on the current
> console.  Isn't it possible that sometimes this font is set only _after_
> udev has started the script cached_setup_font.sh by the following rule
> ACTION=="add", SUBSYSTEM=="vtconsole", KERNEL=="vtcon*", RUN+="/etc/console-setup/cached_setup_font.sh"
> however the font of the current console is read _before_ the script
> cached_setup_font.sh has had a chance to configure the font?

I don't know of any component that does that. Systemd-vconsole, as
mentioned by Michael, is not enabled in the debian packages.

However, I see the following in cached_setup_font:

setfont '/etc/console-setup/cached_Lat15-Fixed16.psf.gz'

if ls /dev/fb* >/dev/null 2>/dev/null; then
    for i in /dev/vcs[0-9]*; do
        { :
            setfont '/etc/console-setup/cached_Lat15-Fixed16.psf.gz'
        } < /dev/tty${i#/dev/vcs} > /dev/tty${i#/dev/vcs}

Might it be that /dev/fb* do not exist during boot, and thus the font
is not loaded in all ttys?


Felipe Sateler

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