Re: [PATCH qxl-wddm-dod v2 16/25] Remove minimum size restrict for custom resolution.

[Frediano Ziglio <fziglio@xxxxxxxxxx>]

On Tue, Sep 6, 2016 at 5:16 PM, Frediano Ziglio <fziglio@xxxxxxxxxx> wrote:

On Tue, Sep 6, 2016 at 5:07 PM, Frediano Ziglio <fziglio@xxxxxxxxxx> wrote:

>
> From: Sandy Stutsman <sstutsma@xxxxxxxxxx>
>
> ---
>  qxldod/QxlDod.cpp | 5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)
>
> diff --git a/qxldod/QxlDod.cpp b/qxldod/QxlDod.cpp
> index 7e2d7c1..4dcfca3 100755
> --- a/qxldod/QxlDod.cpp
> +++ b/qxldod/QxlDod.cpp
> @@ -4512,11 +4512,10 @@ NTSTATUS
> QxlDevice::SetCustomDisplay(QXLEscapeSetCustomDisplay* custom_display)
>      UINT xres = custom_display->xres;
>      UINT yres = custom_display->yres;
>      UINT bpp = QXL_BPP;
> -    DbgPrint(TRACE_LEVEL_ERROR, ("%s - %d (%dx%d#%d)\n", __FUNCTION__, m_Id,
> xres, yres, bpp));
> +    DbgPrint(TRACE_LEVEL_WARNING, ("%s - %d (%dx%d#%d)\n", __FUNCTION__,
> m_Id, xres, yres, bpp));
>      if (xres < MIN_WIDTH_SIZE || yres < MIN_HEIGHT_SIZE) {
> -        DbgPrint(TRACE_LEVEL_VERBOSE, ("%s: (%dx%d#%d) must be at least
> (%dxd)\n", __FUNCTION__,
> +        DbgPrint(TRACE_LEVEL_VERBOSE, ("%s: (%dx%d#%d) less than (%dxd)\n",
> __FUNCTION__,
>              xres, yres, bpp, MIN_WIDTH_SIZE, MIN_HEIGHT_SIZE));
> -        return ERROR_INVALID_DATA;
>      }
>      m_CustomMode =(USHORT) ((m_CustomMode == m_ModeCount-1)?  m_ModeCount -
>      2 : m_ModeCount - 1);
>

This patch is just changing some logging message.

Not true, as it removes the line "return ERROR_INVALID_DATA;" which would

prevent the function from changing the resolution.

Oh, yes you are right.

I would however prefer this patch

https://github.com/flexVDI/qxl-dod/commit/9cc669ab31d31598bd3ca6431f24891bfe40fbae

Windows cannot handle very low resolutions. I actually think that the minimum was moved

to 800x600 in Windows Vista/7.

It is the recommended minimum, however Windows can handle low resolution just fine. We have tested that,

even the old driver behaves like this. I see no reason for making any restriction at all. 

Acked-by: Frediano Ziglio <fziglio@xxxxxxxxxx>

Frediano

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