Hello, i have boot issues with the raspberry pi 4 with opensuse tumbleweed installed. I have done some research and found that adding hdmi_force_hotplug=1 in /boot/config.txt should fix the issue, but there isn’t a boot config file in opensuse, and creating it and adding hdmi_force_hotplug=1 in it doesn’t fix the issue. So, is there a other config file in opensuse? Or whatcould be the issue?
Thanks
It is:
grub.cfg
in the folder:
.boot/grub
Hi and welcome to the Forum 
For user tweaks use /boot/efi/extraconfig.txt instead 
For example, these are my mods for my RPi running as a time server as well as a RTC;
cat /boot/efi/extraconfig.txt
dtparam=spi=on
dtoverlay=disable-bt
dtoverlay=pps-gpio,gpiopin=18
dtoverlay=i2c-rtc,ds1307
dtparam=i2c_arm=on
core_freq=250
force_turbo=1