[Interest] qt 5.11 upgrade results in could not queue DRM page flip error on IMX6 etna

[Johannes Pointner]

Hello Dexter,

try to set the QT_QPA_EGLFS_ALWAYS_SET_MODE variable.



On Tue, Jul 31, 2018 at 3:14 PM, Dexter Travis
<dexter.travis at precisionplanting.com> wrote:
> (apologies for previous message without subject line.)
>
> I am attempting to update a working yocto build system with imx6 dual plus
> CPU running the following
> kernel 4.14 with etnaviv
> libmesa 17.3.0
> libdrm 2.4.85
> qt 5.9.2.  (qt 5.10.x also works)
>
> I would like to update to sumo yocto with
> kernel 4.16 with etnaviv
> libmesa 17.3.8
> libdrm 2.4.91
> qt 5.11
>
> This is an embedded device without X11 installed.
>
> When I run Qt5_CinematicExperience -platform eglfs I get an error "Could not
> queue DRM page flip on screen LVDS1 (Invalid argument)"  I get the same
> error with my custom application.
>
> If I run with -platform linuxfb the application runs correctly.
>
> I have swapped out libdrm, the kernel and libmesa version and find that the
> problem seems to follow my upgrade to qt 5.11.  Said another way, swapping
> the components listed above leads me to believe the problem is with the qt
> upgrade.  Running qt 5.11 with the other originally working components does
> not work.
>
> Looking at the configure log for qtbase (5.11) it looks like all the same
> opengl options are configured as were configured in 5.9 and 5.10. See below.
>
> qt 5.11 configure log details. This qt does not work.
> QPA backends:
> 1185   DirectFB ............................... no
> 1186   EGLFS .................................. yes
> 1187   EGLFS details:
> 1188     EGLFS OpenWFD ........................ no
> 1189     EGLFS i.Mx6 .......................... no
> 1190     EGLFS i.Mx6 Wayland .................. no
> 1191     EGLFS RCAR ........................... no
> 1192     EGLFS EGLDevice ...................... yes
> 1193     EGLFS GBM ............................ yes
> 1194     EGLFS VSP2 ........................... no
> 1195     EGLFS Mali ........................... no
> 1196     EGLFS Raspberry Pi ................... no
> 1197     EGL on X11 ........................... no
> 1198   LinuxFB ................................ yes
> 1199   VNC .................................... yes
> 1200   Mir client ............................. no
>
> qt 5.10.1 working configure section
>  QPA backends:
> 1173   DirectFB ............................... no
> 1174   EGLFS .................................. yes
> 1175   EGLFS details:
> 1176     EGLFS OpenWFD ........................ no
> 1177     EGLFS i.Mx6 .......................... no
> 1178     EGLFS i.Mx6 Wayland .................. no
> 1179     EGLFS RCAR ........................... no
> 1180     EGLFS EGLDevice ...................... yes
> 1181     EGLFS GBM ............................ yes
> 1182     EGLFS Mali ........................... no
> 1183     EGLFS Raspberry Pi ................... no
> 1184     EGL on X11 ........................... no
> 1185   LinuxFB ................................ yes
> 1186   VNC .................................... yes
> 1187   Mir client ............................. no
>
>
> I would appreciate any help with this issue.
>
>
>
> Thank you,
>
>
> Dexter
>
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