"shift+tab=previours" function key works abnormal in Petitboot

[deathscytheh28]

When we press "shift+tab" in Petitboot Language Selection page, it goes next not previous.

[sammj]

Can you describe exactly what you see? At the moment "tab" and "shift-tab" are used for skipping through major screen elements - for example "tab" will jump down to the OK button, then Cancel, then back to the top. "shift-tab" works the same way in reverse.

[deathscytheh28]

We found the behavior between console output and VGA output is different. On console output, "tab" and "shift-tab" works as you said, but on VGA output, "tab" and "shift+tab" works the same.

[sammj]

As a quick test, if you drop to the shell while on the VGA console and enter
stty raw ; hexdump -C -n 10; stty sane
then press shift-tab several times until the command returns, what output do you get?. For example, you will probably see something like this:

^[[Z^[[Z^[[Z^[[Z00000000 1b 5b 5a 1b 5b 5a 1b 5b 5a 1b ...

[deathscytheh28]

Here is my result:

[jk-ozlabs]

Looks like the TTY is sending tab characters (0x09) when you hit shift-tab there.

We may need to check we have the correct terminal type when we set it up for input modes...

[sammj]

This is fixed by commit open-power/op-build@de7fcc6 in op-build.