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Sun, 17 Mar 2019 09:10:57 -0700 (PDT) MIME-Version: 1.0 References: <mailman.13.1552824000.329.freebsd-stable@freebsd.org> <ccfb7722-3703-2995-641d-256990a1c57d@chaotikum.org> In-Reply-To: <ccfb7722-3703-2995-641d-256990a1c57d@chaotikum.org> From: Warner Losh <imp@bsdimp.com> Date: Sun, 17 Mar 2019 10:10:45 -0600 Message-ID: <CANCZdfqd0C=vknLi9Yrr=odLwokg-oSmSw5XfmDB+=CdkhPK2Q@mail.gmail.com> Subject: Re: hw.vga.acpi_ignore_no_vga=1 for installation media To: Leon Christopher Dietrich <doralitze@chaotikum.org> Cc: FreeBSD-STABLE Mailing List <freebsd-stable@freebsd.org> X-Rspamd-Queue-Id: 4DB2B85DEA X-Spamd-Bar: ----- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=bsdimp-com.20150623.gappssmtp.com header.s=20150623 header.b=AwVKMZDI X-Spamd-Result: default: False [-5.68 / 15.00]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-0.997,0]; R_DKIM_ALLOW(-0.20)[bsdimp-com.20150623.gappssmtp.com:s=20150623]; FROM_HAS_DN(0.00)[]; NEURAL_HAM_SHORT(-0.94)[-0.940,0]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; MIME_GOOD(-0.10)[multipart/alternative,text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-stable@freebsd.org]; DMARC_NA(0.00)[bsdimp.com]; TO_MATCH_ENVRCPT_SOME(0.00)[]; TO_DN_ALL(0.00)[]; MX_GOOD(-0.01)[cached: ALT1.aspmx.l.google.com]; DKIM_TRACE(0.00)[bsdimp-com.20150623.gappssmtp.com:+]; RCPT_COUNT_TWO(0.00)[2]; RCVD_IN_DNSWL_NONE(0.00)[9.2.8.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.0.4.6.8.4.0.b.8.f.7.0.6.2.list.dnswl.org : 127.0.5.0]; R_SPF_NA(0.00)[]; FORGED_SENDER(0.30)[imp@bsdimp.com,wlosh@bsdimp.com]; MIME_TRACE(0.00)[0:+,1:+]; RCVD_TLS_LAST(0.00)[]; ASN(0.00)[asn:15169, ipnet:2607:f8b0::/32, country:US]; FROM_NEQ_ENVFROM(0.00)[imp@bsdimp.com,wlosh@bsdimp.com]; IP_SCORE(-2.74)[ip: (-8.79), ipnet: 2607:f8b0::/32(-2.74), asn: 15169(-2.09), country: US(-0.07)]; RCVD_COUNT_TWO(0.00)[2] Content-Type: text/plain; charset="UTF-8" X-Content-Filtered-By: Mailman/MimeDel 2.1.29 X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Production branch of FreeBSD source code <freebsd-stable.freebsd.org> List-Unsubscribe: <https://lists.freebsd.org/mailman/options/freebsd-stable>, <mailto:freebsd-stable-request@freebsd.org?subject=unsubscribe> List-Archive: <http://lists.freebsd.org/pipermail/freebsd-stable/> List-Post: <mailto:freebsd-stable@freebsd.org> List-Help: <mailto:freebsd-stable-request@freebsd.org?subject=help> List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/freebsd-stable>, <mailto:freebsd-stable-request@freebsd.org?subject=subscribe> X-List-Received-Date: Sun, 17 Mar 2019 16:11:00 -0000 I generally like this idea... But two caveats... First, we'd need to update the docs so that folks doing serial installs can unset it.... Though serial installs are a weird beast.... Second, if it's really needed, we should have the installer generate it. alas, only vt can tell us that, but it should be easy to add a sysctl to it that says that it has done video by ignoring the absence of the vga node... Warner On Sun, Mar 17, 2019 at 6:58 AM Leon Christopher Dietrich < doralitze@chaotikum.org> wrote: > Sound's like solid idea. > > A lot of systems out there lack propper ACPI description for VGA and it > would definitly make the installation on such a system much more easy. > > As far as I can tell it doesn't seam to break other things and even low > power system without VGA (like a pcengines apu2) don't seam to suffer. > > On 17.03.19 13:00, FreeBSD-stable-request@freebsd.org wrote: > > Date: Sun, 17 Mar 2019 02:59:12 +0700 > > From: Eugene Grosbein <eugen@grosbein.net> > > To: FreeBSD stable <freebsd-stable@freebsd.org> > > Subject: hw.vga.acpi_ignore_no_vga=1 for installation media > > Message-ID: <912fc95d-5a5e-012b-7385-0f43f50dca65@grosbein.net> > > Content-Type: text/plain; charset=koi8-r > > > > Hi! > > > > Since 11.2-RELESE, default console driver vt(4) checks ACPI table for > presence of VGA in the system. > > It does not initialize console (no input, no output) if ACPI states > there is no VGA adapter. > > > > There are PRs describing many cases when VGA is present but ACPI lies > > and we have a regression compared with 11.1 and earlier: > > FreeBSD cannot be installed interactively onto such a system, leaving > aside serial console. > > > > vt(4) has loader knob to restore pre-11.2 behaviour and ignore ACPI: > > > > hw.vga.acpi_ignore_no_vga=1 > > > > Should we add this unconditionally to the installation media designed > for interactive VGA-based installation? > > > > > > ------------------------------ > > > >