> 
> https://bugzilla.redhat.com/show_bug.cgi?id=1411340
> Do not set SupportNonVGA field for device rev.4 and higher.
> Then the class driver will not call miniport's procedure
> StopDeviceAndReleasePostDisplayOwnership upon PnP stop.
> QXL device modes are not compatible with VGA ones; the
> driver in this procedure returns display information related
> to QXL mode which later used by BasicDisplay driver and causes
> it to show the screen incorrectly or fail to show it at all.
> 
> Signed-off-by: Yuri Benditovich <yuri.benditov...@daynix.com>
> ---
>  qxldod/QxlDod.cpp | 2 +-
>  qxldod/QxlDod.h   | 2 ++
>  2 files changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/qxldod/QxlDod.cpp b/qxldod/QxlDod.cpp
> index 7adbec4..001cd67 100755
> --- a/qxldod/QxlDod.cpp
> +++ b/qxldod/QxlDod.cpp
> @@ -411,7 +411,7 @@ NTSTATUS QxlDod::QueryAdapterInfo(_In_ CONST
> DXGKARG_QUERYADAPTERINFO* pQueryAda
>              pDriverCaps->PointerCaps.Monochrome = 1;
>              pDriverCaps->PointerCaps.Color = 1;
>  
> -            pDriverCaps->SupportNonVGA = TRUE;
> +            pDriverCaps->SupportNonVGA = m_pHWDevice->IsBIOSCompatible();
>  
>              DbgPrint(TRACE_LEVEL_VERBOSE, ("<--- %s 1\n", __FUNCTION__));
>              return STATUS_SUCCESS;
> diff --git a/qxldod/QxlDod.h b/qxldod/QxlDod.h
> index 4df4c61..8df1fcf 100755
> --- a/qxldod/QxlDod.h
> +++ b/qxldod/QxlDod.h
> @@ -263,6 +263,7 @@ public:
>      virtual NTSTATUS Escape(_In_ CONST DXGKARG_ESCAPE* pEscap) = 0;
>      NTSTATUS AcquireDisplayInfo(DXGK_DISPLAY_INFORMATION& DispInfo);
>      ULONG GetId(void) { return m_Id; }
> +    virtual BOOLEAN IsBIOSCompatible() { return TRUE; }
>  protected:
>      virtual NTSTATUS GetModeList(DXGK_DISPLAY_INFORMATION* pDispInfo) = 0;
>  protected:
> @@ -480,6 +481,7 @@ public:
>      NTSTATUS SetPointerShape(_In_ CONST DXGKARG_SETPOINTERSHAPE*
>      pSetPointerShape);
>      NTSTATUS SetPointerPosition(_In_ CONST DXGKARG_SETPOINTERPOSITION*
>      pSetPointerPosition);
>      NTSTATUS Escape(_In_ CONST DXGKARG_ESCAPE* pEscap);
> +    BOOLEAN IsBIOSCompatible() { return FALSE; }
>  protected:
>      NTSTATUS GetModeList(DXGK_DISPLAY_INFORMATION* pDispInfo);
>      VOID BltBits (BLT_INFO* pDst,

Why you used IsBIOSCompatible name instead of IsVGACompatible ?

Frediano
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