(In reply to Nicolas Patricio Saenz Julienne from comment #39) > (In reply to Chaoyang Qin from comment #38) > > (In reply to Nicolas Patricio Saenz Julienne from comment #37) > > > (In reply to Chaoyang Qin from comment #35) > > > > (In reply to Nicolas Patricio Saenz Julienne from comment #33) > > > > > Hi Chaoyang Qin, there was still a fix to be done. Keep in mind that the > > > > > display driver is in the staging tree and the quality is not assured. > > > > > > > > > > Please install this kernel: > > > > > https://download.opensuse.org/repositories/home:/nsaenzjulienne:/fbtft-test/ > > > > > ARM/aarch64/kernel-default-5.1.16-3.1.g598180e.aarch64.rpm > > > > > > > > > > And use the overlay I'll attach following this message. To do so you have > > > > > to: copy the file into '/boot/efi/overlays', and replace > > > > > dtoverlay=rpi-display with dtoverlay=waveshare35a in your config.txt. > > > > > > > > Screen go black ,and imageview test show load failed. > > > > > > Please try the X11 test: > > > https://github.com/notro/fbtft/wiki/Framebuffer-use#x-server > > > > > > Apart from running startx, also try restarting the device after creating the > > > configuration file. > > > > Still unable,X server not init? > > dmesg output stopped at 43 sec > > Still black output? did you see a console output on the display while > booting? > > If not, let's try something more drastic, do: > > cat /dev/urandom > /dev/fb1 > > You should see random colored pixels. But.. type reboot in SSH, a while later,HDMI output restored,and showing rebooting, the 3.5 display still remain this.... new dmesg output attached Note:rm /usr/share/X11/xorg.conf.d/99-fbdev.conf and HDMI output restored normal.