[Qemu-devel] [Bug 691424] Re: qemu/kvm SDL over ssh -X broken

[Brad Hards]

Hi,

I tried this with a current (git) build, and I'm not able to reproduce
it.

I do see a problem with a bad initial SDL window size (its much too
small) on a remote machine over a moderate-level network (wireless LAN).
I don't see that when ssh-ing to localhost (even though both hosts are
basically the same).

I do see differences between current (git) qemu and the 0.12.5 version.
Current git boots the ISO, but doesn't appear to get to the login
screen.

I'm not sure what the differences between our configurations are. I have
SDL 1.2.14-6ubuntu3

Still investigation.

Brad

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https://bugs.launchpad.net/bugs/691424

Title:
  qemu/kvm SDL over ssh -X broken

Status in QEMU:
  New

Bug description:
  qemu/kvm by default uses SDL to render the output of its emulated VGA 
graphics.
  This is broken over ssh -X since quite a while.
  The only workaround I know, is to use qemu -vnc :0
  and connect using vncviewer

  
  How To Reproduce:
  1. zypper in qemu
  2. ssh -X localhost qemu -cdrom ANYISOFILE

  Actual Results:
  qemu hangs in an endless loop on the BIOS display screen

  Expected Results:
  should boot up the iso as 0.10 versions did

  Reproducible: Always

  
  this is what broke it:
  $ git bisect bad
  c18a2c360e3100bbd71162cf922dcd8c429a8b71 is first bad commit
  commit c18a2c360e3100bbd71162cf922dcd8c429a8b71
  Author: Stefano Stabellini <address@hidden>
  Date:   Wed Jun 24 11:58:25 2009 +0100

      sdl zooming

      Hi all,
      this patch implements zooming capabilities for the sdl interface.
      A new sdl_zoom_blit function is added that is able to scale and blit a
      portion of a surface into another.
      This way we can enable SDL_RESIZABLE and have a real_screen surface with
      a different size than the guest surface and let sdl_zoom_blit take care
      of the problem.

      Signed-off-by: Stefano Stabellini <address@hidden>
      Signed-off-by: Anthony Liguori <address@hidden>

  :100644 100644 a06c9bfc22cc6de1c6e5e9068d6bf59d89613767 
f8dc5065dd27010bfdbb6bcfb0c6e3af25024cdb M      Makefile
  :100644 100644 417217582363a87ee67e746ba798e285a64b6cdc 
35183399f65de6f50f3baa4767ab7d4d11d45bca M      console.h
  :100644 100644 178b5532b8d9dd2194a8662fbfdcd49b4bc04222 
d81399e51276e1c97fa1f7272ef16ea4c312b51b M      sdl.c
  :000000 100644 0000000000000000000000000000000000000000 
56d3604fc3d79e4cc4622be8437c78bf70075da3 A      sdl_zoom.c
  :000000 100644 0000000000000000000000000000000000000000 
33dc63408b43a37fd6b1acde3fa62b1a51315e75 A      sdl_zoom.h
  :000000 100644 0000000000000000000000000000000000000000 
64bbca849bd3af678c2259b4d8cc0e48c6a6b43c A      sdl_zoom_template.h

  
  This problem occurs on both Debian and openSUSE.