Date: Fri, 25 Sep 2020 07:07:48 +1000 From: Peter Grehan <grehan@freebsd.org> To: xtouqh@mm.st Cc: virtualization@freebsd.org Subject: Re: bhyve: vnc limited to 1920x1080? Message-ID: <fafb2daf-549e-f664-3913-febd55085d00@freebsd.org> In-Reply-To: <a6a20477-851b-33a3-a749-07f2f7167be5@mm.st> References: <a6a20477-851b-33a3-a749-07f2f7167be5@mm.st>
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> I used the following option for bhyve command: > > -s 29,fbuf,rfb=192.168.1.6:8001,wait,w=2560,h=1440> > ...and got
rather confusing error message:> > Invalid fbuf emulation option "w">
fbuf: {wait,}{vga=on|io|off,}rfb=<ip>:port{,w=width}{,h=height}> device
emulation initialization error: Inappropriate ioctl for device> > Had to
check the man page/source to find the hardcoded 1920x1080 > limitation
-- is there any technical reason for it, or is it just "ought > to be
enough for anybody"?
The framebuffer is 16MB, and the max of 1920x1200 was chosen as a
compromise between a common resolution that would fit in that, the
amount of CPU used in the tile-based motion detection, and the amount of
bandwidth required to transmit full-screen's worth of data at 30 fps.
The original intent was the VNC console would only be used for setup,
and after that a more efficient remote desktop would be set up on the guest.
(More details at
https://people.freebsd.org/~grehan/talks/bhyve_bsdtw_bhyve_graphics.pdf)
later,
Peter.
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