I’m not happy with the step size of the volume control of my Gigaset
GS290 when connected to a JBL Flip Essential 2 Bluetooth speaker.
Researching the topic lead me to 1, which suggests modifying
/system/default.prop, adding the lines
I’ve tried the following:
adb on my Linux computer. Enabled ‘Developer options’,
‘USB debugging’ and ‘Rooted debugging’ in my phone’s settings.
$ adb devices List of devices attached GS290CTM904535 device $ adb root restarting adbd as root $ adb pull /system/build.prop /system/build.prop: 1 file pulled, 0 skipped. 1.6 MB/s (5177 bytes in 0.003s)
Up to here, this is successful. However, I cannot upload the modified
file to my phone again:
$ adb push build.prop /system/ adb: error: failed to copy 'build.prop' to '/system/build.prop': remote couldn't create file: Read-only file system
Also, I cannot remount
$ adb remount failed to remount partition dev:/dev/block/platform/bootdevice/by-name/system mnt:/: Permission denied failed to remount partition dev:/dev/block/platform/bootdevice/by-name/vendor mnt:/vendor: Permission denied remount failed $ adb shell GS290:/ # mount -o rw,remount /system mount: '/system' not in /proc/mounts
How to proceed from here?