Date: Thu, 18 Jul 2019 10:57:06 -0400 From: Ryan Moeller <ryan@ixsystems.com> To: "freebsd-hackers@freebsd.org" <freebsd-hackers@freebsd.org> Subject: Re: Resetting console on boot Message-ID: <CAGuotKC1oRWTw_m0_m0YiqjJ_gk%2BSATf=aR3DC=%2B0O7BPuzTQA@mail.gmail.com> In-Reply-To: <CANCZdfpTEdQRkknAj8syh5e_p_fNqdLFKTcUdaJH3H%2BAtgjPNA@mail.gmail.com> References: <CAGuotKD9d4mXoWpH3Wy5r5COvwhQ4iGEfngPZ3COXFaz-5851A@mail.gmail.com> <721ab68d-cde4-41bb-c105-d15cf07903fa@FreeBSD.org> <CANCZdfpTEdQRkknAj8syh5e_p_fNqdLFKTcUdaJH3H%2BAtgjPNA@mail.gmail.com>
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Apparently this also could be wanted with vidconsole, as some IPMI console redirection to com1 and serial over lan redirects from the vidconsole. I just discovered this while testing Lev's patches. -Ryan On Tue, Jul 16, 2019 at 11:08 AM Warner Losh <imp@bsdimp.com> wrote: > > > On Tue, Jul 16, 2019 at 4:55 AM Lev Serebryakov <lev@freebsd.org> wrote: > >> On 15.07.2019 23:29, Ryan Moeller wrote: >> >> > What do people think about having an early boot stage send some escape >> > sequence to reset terminals to some sane default terminal settings? >> Often >> > firmware or other causes will leave an unreadable font color or break >> line >> > feeds, and the terminal tends to stay that way until a shell clears and >> > resets the screen. If a shell can do it, surely loader could do it (or >> even >> > earlier, if it is not too complex). To my knowledge it should be just a >> > matter of printing some escape codes before starting the normal boot >> menus >> > when using a serial console. I believe this is already done when the >> > console is set to vidconsole or efi. >> > >> > Thoughts? Suggestions? >> >> I've proposed this long ago for serial terminals: >> >> https://reviews.freebsd.org/D17102 >> https://reviews.freebsd.org/D17103 >> >> I have hardware which sets "black on black" before passing control to OS. >> > > That would work for the BIOS case, but not the UEFI case, which is where I > see the biggest issues. > > Warner > -- Ryan Moeller iXsystems, Inc. OS Developer Email: ryan@iXsystems.com
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