Hi dear BBB community, I'm new to linux.
Here is my setup : BBB with the image found here : https://debian.beagleboard.org/images/rcn-ee.net/rootfs/bb.org/testing/2017-08-01/lxqt-4gb/ DLPDLCR2000EVM capes that runs trough PARALLEL I/F I have tearing issue due ton synchronization. The DLPDLCR2000EVM can lock on Vsync from the device but i'm stuck at Vsync=23.5 Hz and no way to change this. My target is 60Hz since the module is expecting a multiple of this. Here is what I've tried so far : fbset mode "640x360" geometry 640 360 640 360 32 timings 0 0 0 0 0 0 0 accel true rgba 8/16,8/8,8/0,0/0 endmode fbset -t 57078 32 32 64 8 7 4 ioctl FBIOPUT_VSCREENINFO: Invalid argument -Any mode or timing change is refused trough fbset except -g -accell which are all fine debian@beaglebone:/$ xrandr --verbose xrandr: Failed to get size of gamma for output default Screen 0: minimum 640 x 360, current 640 x 360, maximum 640 x 360 default connected 640x360+0+0 (0x269) normal (normal) 0mm x 0mm Identifier: 0x268 Timestamp: 42548 Subpixel: unknown Clones: CRTC: 0 CRTCs: 0 Transform: 1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 filter: 640x360 (0x269) 0.000MHz *current h: width 640 start 0 end 0 total 640 skew 0 clock 0.00KHz v: height 360 start 0 end 0 total 360 clock 0.00Hz xrandr -r 60Hz Rate 60.00 Hz not available for this size debian@beaglebone:/$ cvt 640 360 60 # 640x360 59.84 Hz (CVT 0.23M9) hsync: 22.50 kHz; pclk: 18.00 MHz Modeline "640x360_60.00" 18.00 640 664 720 800 360 363 368 376 -hsync +vsync debian@beaglebone:/$ xrandr --newmode xrandr: failed to parse '(null)' as a mode specification Try 'xrandr --help' for more information. debian@beaglebone:/$ xrandr --newmode "640x360_60" 18.00 640 664 720 800 360 363 368 376 -hsync -vsync xrandr: Failed to get size of gamma for output default debian@beaglebone:/$ xrandr xrandr: Failed to get size of gamma for output default Screen 0: minimum 640 x 360, current 640 x 360, maximum 640 x 360 default connected 640x360+0+0 0mm x 0mm 640x360 0.00* 640x360_60 (0x283) 18.000MHz h: width 640 start 664 end 720 total 800 skew 0 clock 22.50KHz v: height 360 start 363 end 368 total 376 clock 59.84Hz debian@beaglebone:/$ xrandr --addmode 0x268 640x360_60 xrandr: Failed to get size of gamma for output default Any lead on this would be greatly appreciated. Christophe -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/bbbd4859-153e-4cb3-863c-61a6498b37dan%40googlegroups.com.
