Re: [Qemu-devel] QEMU 0.8.1 - Invisible wall

[Dan Sandberg <dan.sandberg@medsci.uu.se>]

Thomas Han wrote:

> Hi Anthony,
>
> Sorry for the late reply.  I did try out the patch with my local build 
> and I
> haven't see that  "invisible wall" mouse problem for a few days now.
>
> Thanks very much,
> Thomas
>
> On 5/4/06, Anthony Liguori <aliguori@us.ibm.com> wrote:
>
>>
>> Thomas Han wrote:
>> > Hi,
>> >
>> > For what it's worth.  I have also seen this "invisible wall" problem
>> > with my mouse for a few weeks off the CVS build too.
>>
>> Can you try out the following patch.  *grumbles about SDL's brokenness*
>>
>> Regards,
>>
>> Anthony Liguori
>>
>> > Since 0.8.1 came out yesterday, Instead of using CVS build, I'm now
>> > running Qemu 0.8.1 + kqemu-1.3.0pre6.  My host OS is FC5 and I'm
>> > running XP inside it.
>> >
>> > Thanks,
>> > Thomas
>> >
>> > On 5/4/06, *Christian MICHON* < christian.michon@gmail.com
>> > <mailto:christian.michon@gmail.com>> wrote:
>> >
>> >     qemu 0.8.0 does not show this invisible barrier issue.
>> >     if this is worth anything, I use SDL 1.2.9.
>> >
>> >     If someone can reproduce the issue also on linux hosts,
>> >     there could be a lead.
>> >
>> >     On 5/4/06, Christian MICHON <christian.michon@gmail.com
>> >     <mailto:christian.michon@gmail.com>> wrote:
>> >     > I removed manually vnc_display_init, and this is not the
>> culprit...
>> >     > I'll check anyway versus qemu-0.8.0...
>> >     >
>> >     --
>> >     Christian
>> >
>> >
>> >     _______________________________________________
>> >     Qemu-devel mailing list
>> >     Qemu-devel@nongnu.org <mailto:Qemu-devel@nongnu.org>
>> >     http://lists.nongnu.org/mailman/listinfo/qemu-devel
>> >
>> >
>> > 
>> ------------------------------------------------------------------------
>> >
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>> >
>>
>>
>>
>> diff -r 39a6dd1136c6 sdl.c
>> --- a/sdl.c     Thu May 04 04:13:13 2006 +0000
>> +++ b/sdl.c     Thu May 04 21:30:11 2006 -0500
>> @@ -280,13 +280,18 @@ static void sdl_update_caption(void)
>>
>> static void sdl_hide_cursor(void)
>> {
>> -    SDL_SetCursor(sdl_cursor_hidden);
>> +    if (kbd_mouse_is_absolute()) {
>> +       SDL_ShowCursor(1);
>> +       SDL_SetCursor(sdl_cursor_hidden);
>> +    } else {
>> +       SDL_ShowCursor(0);
>> +    }
>> }
>>
>> static void sdl_show_cursor(void)
>> {
>>      if (!kbd_mouse_is_absolute()) {
>> -       SDL_SetCursor(sdl_cursor_normal);
>> +       SDL_ShowCursor(1);
>>      }
>> }
>>
>>
>>
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>> Qemu-devel@nongnu.org
>> http://lists.nongnu.org/mailman/listinfo/qemu-devel
>>
>>
>>
>
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>  
>
On my installation (v0.8.1 with WindowsXP host) the "invisible wall" can 
be avoided or reproduced at will and I guess this indicates what´s wrong.

After leaving MouseGrab with Ctrl-Alt there will be an invisible wall if 
I reenter by clicking with the host's mouse pointer far away from where 
the quest-OS-pointer is. On the other hand if I reenter by carefully 
clicking exactly at the guest-OS-pointer they will be in sync and 
everything seems to be OK.
I haven´t been looking at the source-code, but my suggestion is that in 
the Click-event-handler where Mousegrab is entered the guest-OS pointer 
coordinates should be passed rather than the host's coordinates 
(simulating a click at the exakt right position).
Regards
Dan Sandberg