Re: [Qemu-devel] vnc regression with -vga vmware

[Serge Hallyn <serge.hallyn@ubuntu.com>]

Quoting Peter Lieven (pl@kamp.de):
> 
> On 17.03.2014 16:19, Serge Hallyn wrote:
> >Quoting Peter Lieven (lieven-lists@dlhnet.de):
> >>I found 2 issues:
> >>
> >>- with vmware VGA the server surface and the client desktop size are out of sync for some time
> >>at a resolution change. the server surface gets updates for x coordinates that are out of bound
> >>for the client.
> >>- the max width of the client (2360) is not dividable by 16 (VNC_DIRTY_PIXELS_PER_BIT).
> >>
> >>I will try to fix this in ui/vnc but we should definetly look for the root cause.
> >Thanks, Peter!
> >
> >-serge
> 
> 
> The vmware vga driver seems to do some nasty things.
> I receive the msg like this (independent of ui/vnc):
> vmsvga_update_rect: update x was < 0 (-65)
> 
> Can you try the following patch:

Indeed, with this patch it seems quite stable, thanks.

-serge

> diff --git a/hw/display/vmware_vga.c b/hw/display/vmware_vga.c
> index bd2c108..6ae3348 100644
> --- a/hw/display/vmware_vga.c
> +++ b/hw/display/vmware_vga.c
> @@ -25,6 +25,7 @@
>  #include "hw/loader.h"
>  #include "trace.h"
>  #include "ui/console.h"
> +#include "ui/vnc.h"
>  #include "hw/pci/pci.h"
> 
>  #undef VERBOSE
> @@ -218,7 +219,7 @@ enum {
> 
>  /* These values can probably be changed arbitrarily.  */
>  #define SVGA_SCRATCH_SIZE               0x8000
> -#define SVGA_MAX_WIDTH                  2360
> +#define SVGA_MAX_WIDTH                  ROUND_UP(2360, VNC_DIRTY_PIXELS_PER_BIT)
>  #define SVGA_MAX_HEIGHT                 1770
> 
>  #ifdef VERBOSE
> diff --git a/ui/vnc.c b/ui/vnc.c
> index 9c84b3e..5925774 100644
> --- a/ui/vnc.c
> +++ b/ui/vnc.c
> @@ -888,7 +888,7 @@ static int vnc_update_client(VncState *vs, int has_dirty, bool sync)
>          VncDisplay *vd = vs->vd;
>          VncJob *job;
>          int y;
> -        int height;
> +        int height, width;
>          int n = 0;
> 
>          if (vs->output.offset && !vs->audio_cap && !vs->force_update)
> @@ -907,6 +907,7 @@ static int vnc_update_client(VncState *vs, int has_dirty, bool sync)
>          job = vnc_job_new(vs);
> 
>          height = MIN(pixman_image_get_height(vd->server), vs->client_height);
> +        width = MIN(pixman_image_get_width(vd->server), vs->client_width);
> 
>          y = 0;
>          for (;;) {
> @@ -925,8 +926,11 @@ static int vnc_update_client(VncState *vs, int has_dirty, bool sync)
>                                      VNC_DIRTY_BPL(vs), x);
>              bitmap_clear(vs->dirty[y], x, x2 - x);
>              h = find_and_clear_dirty_height(vs, y, x, x2, height);
> -            n += vnc_job_add_rect(job, x * VNC_DIRTY_PIXELS_PER_BIT, y,
> -                                  (x2 - x) * VNC_DIRTY_PIXELS_PER_BIT, h);
> +            x2 = MIN(x2, width / VNC_DIRTY_PIXELS_PER_BIT);
> +            if (x2 > x) {
> +                n += vnc_job_add_rect(job, x * VNC_DIRTY_PIXELS_PER_BIT, y,
> +                                      (x2 - x) * VNC_DIRTY_PIXELS_PER_BIT, h);
> +            }
>          }
> 
>          vnc_job_push(job);
> 
> Peter
> 
> 
>