[Qemu-devel] [Bug 568614] Re: x86_64 host curses interface: spacing/garbling

[Andrzej Zaborowski]

This is probably the source of the problem.  As you say it'd be best to
use chtype directly if it can be done cleanly, unfortunately it looks
like it'll add a curses specific snippet in console.h, but so be it.
The only other option is to add a conversion step in curses.c and give
up zero-copy passing screen data to curses, which I'd like to avoid.

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https://bugs.launchpad.net/bugs/568614

Title:
  x86_64 host curses interface: spacing/garbling

Status in QEMU:
  In Progress

Bug description:
  Environment:
  Arch Linux x86_64, kernel 2.6.33, qemu 0.12.3

  Steps to reproduce:
  1. Have a host system running 64-bit Linux.
  2. Start a qemu VM with the -curses flag.

  Expected results:
  Text displayed looks as it would on a real text-mode display, and VM is 
therefore usable.

  Actual results:
  Text displayed contains an extra space between characters, causing text to 
flow off the right and bottom sides of the screen. This makes the curses 
interface unintelligible.

  The attached patch fixes this problem on 0.12.3 on my installation
  without changing behavior on a 32-bit machine.  I don't know enough of
  the semantics of console_ch_t to know if this is the "correct" fix or
  if there should be, say, an extra cast somewhere instead.

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