Hi, On Wed, Oct 07, 2020 at 08:46:24PM -0700, Alex Ryan wrote: > I am unable to boot the jellyfish release of Automotive Grade Linux on the > Raspberry Pi 4B (4GB) when connected to the standard touchscreen and I'm > not sure why. > > After the screen flashes colors, the red light on the pi stays solid and > the os does not boot. > > It does boot when connected to an HDMI monitor. > > But the screen is sideways, so that's not very helpful. > > I can change the orientation of the screen on the HDMI monitor in > /etc/xdg/weston/weston.ini, > > however, it chops off the bottom of the screen when I do so. > > There's no ability to scroll, so the apps are unusable like this. The demo applications, they all assume that you'll be using a portrait orientation of the display. Further more, there's no more automatic scaling of applications, like we had in icefish, so anything lower than 1080p will require tweaking in the demo applications, same as the orientation. So if that panel is lower than that, you'll probably have the same issue. You can still use Qt to do the automatic scaling, rather than modifying the applications, but you'll need to do that yourself, and you need to "enable" that for all applications. The FDT error is about missing/loading something else instead of correct DTB. There are people using RPi4 so someone more familiar with RPi4 might help on this matter. > > > So, I'm kind of stuck with no display device. > > Note: Both the HDMI monitor and the touchscreen worked without error in the > icefish release. > > Having either work would be fine. > > Alternatively, perhaps I need a special display device? > > > I'm certain the problem is not with the touch screen because Raspbian OS > boots okay. > > > To debug, I connected a USB TTY cable to the pi. > > With the default cmdline.txt and config.txt, I see this: > > 2020.1 (un 9 2020-:40 +0000) > > RAM: 3.7 Gi > > RPI 4 dl0xc011 00: mmc2e34 > > Lom FAT... > > t: erial > > Err: serial > > Net Net Initializtionipped > > it an key to stop autoboot: 2 > > switch totits #0, OK > > mm i curredvice > > Scannc 0:1.. > > Foot sriptb262 bys r in 9 ms (28.3iB/s) > > ##Execuinript at 0000 > > libfdt fdt_check_hder(_ERR_BADMAGIC > > RO Dtfind a cmdlneteiee > > rernel .. > > > This /boot/cmdline.txt looked odd, so I changed it like so: > > dwc_otg.lpm_enable=0 console=115200;ttyS0 root=/dev/mmcblk0p2 > rootfstype=ext4 rootwait usbhid.mousepoll=0 > > > => > > > dwc_otg.lpm_enable=0 console=serial0,115200 console=tty1 > root=/dev/mmcblk0p2 rootfstype=ext4 rootwait video=DSI-1:800x480@60,rotate=0 > usbhid.mousepoll=0 > > > console was set this way in the icefish release and in raspbian OS. > > > I also experimented with adding some options to config.txt to persuade it > to use the touchscreen > > #Added > > hdmi_ignore_hotplug=1 > > display_default_lcd=1 > > ignore_lcd=0 > > disable_touchscreen=0 > > I see this result: > > U-Boot 2020.01 (Jun 29 2020 - 03:06:40 +0000) > > DRAM: 3.7 GiB > > RPI 4 Model B (0xc03111) > > MMC: mmcnr@7e300000: 1, emmc2@7e340000: 0 > > Loading Environment from FAT... OK > > In: serial > > Out: serial > > Err: serial > > Net: Net Initialization Skipped > > No ethernet found. > > Hit any key to stop autoboot: 0 > > switch to partitions #0, OK > > mmc0 is current device > > Scanning mmc 0:1... > > Found U-Boot script /boot.scr > > 262 bytes read in 8 ms (31.3 KiB/s) > > ## Executing script at 02400000 > > libfdt fdt_check_header(): FDT_ERR_BADMAGIC > > 15432192 bytes read in 993 ms (14.8 MiB/s) > > ERROR: Did not find a cmdline Flattened Device Tree > > Starting kernel ... > > > I'm not sure what a "cmdline Flattened Device Tree" or why this error seems > to prevent booting when using the touch screen but not the monitor. > > > -- > Alex Ryan > https://www.linkedin.com/in/alexryan > > > > > -=-=-=-=-=-=-=-=-=-=-=- Links: You receive all messages sent to this group. View/Reply Online (#8716): https://lists.automotivelinux.org/g/agl-dev-community/message/8716 Mute This Topic: https://lists.automotivelinux.org/mt/77377098/2167316 Group Owner: agl-dev-community+owner@xxxxxxxxxxxxxxxxxxxxxxxxx Unsubscribe: https://lists.automotivelinux.org/g/agl-dev-community/leave/4543822/883735764/xyzzy [list-automotive-discussions82@xxxxxxxxxxx] -=-=-=-=-=-=-=-=-=-=-=-
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