6703 2014-09-09 17:05:06 +0000 Kernel hangs on boot when HDMI cable is plugged 2015-10-21 16:50:11 +0000 1 1 7 Build System, Metadata & Runtime BSPs bsps-meta-fsl-arm unspecified Other arm RESOLVED FIXED Medium critical Future 1 angolini otavio martin.hintermann picmaster richard.purdie --- --- No (bug/feature does not impact docs) oldest_to_newest 45498 0 angolini 2014-09-09 17:05:06 +0000 If HDMI cable is plugged during the reset/boot process, kernel hangs at the beginning. If kernel is loaded, and then the cable is inserted, no problem. It was reproduced with imx6dlsabresd and imx6qsabresd, kernel: 3.10.17-1.0.1_ga+gdac46c u-boot: 2014.07+fslc+ga824e89 45499 1 angolini 2014-09-09 17:05:39 +0000 https://lists.yoctoproject.org/pipermail/meta-freescale/2014-March/007732.html 45602 2 angolini 2014-09-13 00:44:44 +0000 A workaround for this would be using the following command line in u-boot => setenv panel Hannstar-XGA to avoid the splash screen to be re-directed to HDMI, forcing it to be always on LDVS However it does not fix the kernel crash, only avoid it. 47009 3 picmaster 2014-11-13 23:14:29 +0000 As discussed on the ML, there's another possible work-around (thanks to Fabio). Here are the steps to implement it on imx6q sabresd: 1. Disable the HDMI support in u-boot-fsl, rebuild U-Boot, write the new bootloader on the sdcard. 2. Add your video bootargs to "mmcarg" U-Boot env-var via "editenv mmcarg": video=mxcfb0:dev=hdmi,1280x720M@60,if=RGB24 3. "setenv mmcdev 0" if you're booting from SD2, otherwise skip to 4. 4. "run bootcmd". 5. Observe that Xorg is now visible on the HDMI screen. HDMI cable can be either connected during power-on, or attached later. In both cases HDMI video will work properly. As already stated above, this is just a practical work-around and it doesn't solve the original issue. 47025 4 picmaster 2014-11-14 11:00:46 +0000 > 2. Add your video bootargs to "mmcarg" U-Boot env-var via "editenv mmcarg": "mmcarg" should be actually "mmcargs". 55576 5 angolini 2015-10-21 16:50:11 +0000 It is working now (jethro) with u-boot 2015.10 (at least)