Am 25.07.2014 um 20:42 schrieb Ed Maste: >> On 22/07/14 19:58, Jan Henke wrote: >>> I am experiencing a strange problem with the current kFreeBSD weekly >>> image. Whenever the system is writing to the screen in text mode (e.g. >>> directly after selecting one entry in GRUB: "Copyright....") you can >>> literally watch every single character printed to the screen one after >>> the other. So it takes ages before you even get into the Debian >>> installer. I am running inside a Hyper-V VM. I have double checked >>> against FreeBSD (the upstream one), which does not show this behaviour. > Jan, can you clarify which upstream FreeBSD version and console you > compared against? I suspect you had (text-mode) syscons in the > FreeBSD VM. If graphics-mode vt(4) has wildly different performance > between Debian kFreeBSD and FreeBSD then something very strange is > going on, and we'll want to track it down. > > In both FreeBSD-CURRENT and stable/10 we can now switch between > syscons and vt at boot time, with sc as the default. The console and > mode can be set via loader tunables: > > syscons, text mode: > kern.vty=sc > > vt(4), text mode: > kern.vty=vt > hw.vga.textmode=1 > > vt(4), graphics mode: > kern.vty=vt > hw.vga.textmode=0 > > It should be possible to start with hw.vga.textmode=1 and then have > i915kms take over once X starts, giving graphics-mode consoles from > that point on. > > On 22 July 2014 17:12, Steven Chamberlain <steven@pyro.eu.org> wrote: >> I've seen the exact same thing under plain Qemu: newcons in VGA mode >> seems very slow (but not as serious as you describe in Hyper-V). > Can you quantify "very slow?" I've been testing vt(4) in QEMU on my > FreeBSD host (so no KVM involved), and it's acceptably performant on > my 8-core i7-3770 desktop. Hi Ed, very simple, I compared the default out-of-the-box experience. You find the output of uname -a in the attached screenshot. I do not know where on FreeBSD the kernel build configuration is stored (that is why I prefer to use the Debian/kFreeBSD, I just want the kernel with the familiar userland). On kFreeBSD it works if I manually add the "set kFreeBSD.hw.vga.textmode=1" to the grub entry. Otherwise, as mentioned, the output becomes really slow and the system is not really usable. I assume kFreeBSD uses the newcons by default and the FreeBSD kernel still used the old implementation. -- Best regards Jan
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