Re: [Qemu-devel] Re: More displaystate fallout?

[Stefano Stabellini]

Any update on this?

Stefano Stabellini wrote:

> Stefan Weil wrote:
> 
>> To reproduce it, the 1st console window must be larger than 640 x 480
>> (or the surface of dumb terminal smaller than this).
>>
>> Systems without VGA start with the monitor console which is larger.
>> Qemu (SDL or VNC) will crash when switching from 1st to 2nd console
>> and then back to 1st (which will never show again).
>>
>> See stack trace below. Maybe you must add a simple assertion to console.c
>> to see the access violation.
>>
>> A simple (but crude) fix is to increase the size of the surface.
>>
> 
> 
> 
> I am still unable to get a crash but I was able to get few rendering
> problems.
> However I think I understand the issue: if the is no graphic card and
> the first console has a fixed size, the size of the display surface may
> be wrong.
> 
> Does this patch fixes the problem for you?
> 
> ---
> 
> diff --git a/console.c b/console.c
> index dbb3b70..e02cf63 100644
> --- a/console.c
> +++ b/console.c
> @@ -1419,13 +1419,22 @@ CharDriverState *text_console_init(const char *p)
>  void text_consoles_set_display(DisplayState *ds)
>  {
>      int i;
> +    TextConsole *s;
>  
>      for (i = 0; i < n_text_consoles; i++) {
>          text_console_do_init(text_consoles[i], ds, text_console_strs[i]);
>          qemu_free(text_console_strs[i]);
>      }
> -
>      n_text_consoles = 0;
> +
> +    /* If there are no graphic cards and the first console has a fixed
> +     * size we need to resize the screen surface according to the size
> +     * of the first console */
> +    s = consoles[0];
> +    if (s && s->console_type == TEXT_CONSOLE_FIXED_SIZE) {
> +        ds->surface = qemu_resize_displaysurface(ds->surface, s->g_width, 
> s->g_height, 32, 4 * s->g_width);
> +        dpy_resize(ds);
> +    }
>  }
>  
>  void qemu_console_resize(DisplayState *ds, int width, int height)
> 
> 
>