Dear ethan.hsieh Thanks for reply. My kernel is 5.15.0-1029.33. I will try to update kernel to latest version. I check the kernel log, it can detect HDMI plugin and send notify to framework. The HDMI monitor can display right timing but black screen. It seems Weston don't handle the plugin event.
root@mtk-genio:/home/ubuntu# dmesg [ 57.188220] mediatek-drm-hdmi 1c300000.hdmi: hpd:0 [ 57.236232] mediatek-drm-hdmi 1c300000.hdmi: hpd:1 [ 57.236272] mediatek-drm-hdmi 1c300000.hdmi: Hot Plug State Change! old:0, new:1 [ 57.338143] mediatek-hdmi-phy 11d5f000.hdmi-phy: tmds_high_bit_clk_ratio enabled:0 [ 57.338233] mediatek-drm-hdmi 1c300000.hdmi: is_over_340M:0 [ 57.343862] mediatek-hdmi-mt8195-ddc ddc-i2c: ddc failed! : 0 [ 57.343878] mediatek-drm-hdmi 1c300000.hdmi: set_scrambling:0 [ 57.349416] mediatek-hdmi-mt8195-ddc ddc-i2c: ddc failed! : 0 [ 57.349433] mediatek-drm-hdmi 1c300000.hdmi: set_high_tmds_clock_ratio:0 [ 57.349536] mediatek-hdmi-phy 11d5f000.hdmi-phy: tmds_high_bit_clk_ratio enabled:0 [ 57.366932] Console: switching to colour frame buffer device 240x67 [ 57.398344] mediatek-drm mediatek-drm.4.auto: [drm] fb0: mediatekdrmfb frame buffer device [ 57.467986] mediatek-drm-hdmi 1c300000.hdmi: hpd:1 BR Sam -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to webbrowser-app in Ubuntu. https://bugs.launchpad.net/bugs/2044664 Title: HDMI plugin after boot, but display can't work Status in webbrowser-app package in Ubuntu: New Bug description: [Summary] HDMI plugin but display can't work after boot under HDMI only display [Reproduce] 1. Set display configuration as single HDMI only 2. Boot into the system without plugging HDMI cable 3. Ensure system is booted (check it by debug console), then plug HDMI cable 4. Check the image on HDMI monitor [Expected result] Ubuntu desktop should be shown on HDMI monitor [Actual result] Ubuntu desktop was not shown on HDMI monitor [Fail Rate] 100% [Additional information] Platform: Mediatek Genio1200 EVK Ubuntu Version: 22.04.2 LTS Image: baoshan-classic-desktop-2204-x01-20231005-133.tar.xz To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/webbrowser-app/+bug/2044664/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
