From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Seiderer Date: Thu, 22 Sep 2016 20:50:12 +0200 Subject: [Buildroot] [PATCH] systemd: let getty instead of serial-getty handle /dev/console In-Reply-To: <68b49446-0228-174d-ad47-9209d23ae90a@je-eigen-domein.nl> References: <1473437418-27792-1-git-send-email-bos@je-eigen-domein.nl> <20160911210951.GP5740@free.fr> <87intpzqge.fsf@dell.be.48ers.dk> <20160921220545.238279e6@gmx.net> <68b49446-0228-174d-ad47-9209d23ae90a@je-eigen-domein.nl> Message-ID: <20160922205012.13722beb@gmx.net> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: buildroot@busybox.net Hello Floris, On Wed, 21 Sep 2016 23:47:02 +0200, Floris Bos wrote: > On 09/21/2016 10:05 PM, Peter Seiderer wrote: > > Hello *, > > > > On Wed, 21 Sep 2016 09:01:37 +0200, Peter Korsgaard wrote: > > > >>>>>>> "Yann" == Yann E MORIN writes: > >> > Floris, All, > >> > On 2016-09-09 18:10 +0200, Floris Bos spake thusly: > >> >> The serial-getty unit depends on dev-%i.device which does not > >> >> seem to be created for /dev/console > >> >> Workaround this by letting normal getty unit handle things > >> >> if BR2_TARGET_GENERIC_GETTY_PORT is set to 'console' > >> >> > >> >> Signed-off-by: Floris Bos > >> > >> > I haven't tested that, but I think this is OK just on principle. > >> > >> > I just wonder if that behaves correctly when console is a serial line or > >> > anything else (e.g. a VT on HDMI, or through a debug channel...) > >> > >> Yeah, me too. Does anybody know what the difference exactly is between > >> getty/serial-getty, and when one should be used over the other? > >> > > Tested for the rpi3/glibc/systemd case and failed: I get a doubled > > (and unusable) ' Welcome to Buildroot/buildroot login:' on serial and > > no login on hdmi... > > Empty cmdline.txt will give hdmi. > > Recall you need "console=serial0,115200 console=tty1" with tty1 last in > cmdline.txt if you want them simultaneous. Changed cmdline.txt to: root=/dev/mmcblk0p2 rootwait console=ttyAMA0,115200 console=tty1 Which gives me two (functional) logins on serial and hdmi. But I think changing package/rpi-firmware/cmdline.txt unconditional will break the other Init systems, see commit log from last patch touching cmdline.txt ([1): ...change BR2_TARGET_GENERIC_GETTY_PORT to "console", so it starts a getty on the last console= passed to the kernel, ttyAMA0... Regards, Peter [1] https://git.buildroot.net/buildroot/commit/?id=20878a1017e2bf7eb8c5f870dc6d2641493cb0f9 > So that tty1 becomes /dev/console and serial is handled by systemd's > automatic getty generator. > > Perhaps there is an issue if you have the order swapped, and both > systemd's automatic stuff and the manual symlink try to display a getty > on serial. > Not sure how to disable systemd's automatic behavior. > > > > Yours sincerely, > > Floris Bos > > _______________________________________________ > buildroot mailing list > buildroot at busybox.net > http://lists.busybox.net/mailman/listinfo/buildroot