fastboot doesn't work, adb does work ??

[driesdep]

Hello,
I have here a strange problem :
i have connect my tablet (samsung galaxy tab s), into my computer,
And when i type : adb devices ; my computer returns a number (which is fine)

When i type : fastboot devices ; he can't find the device.
(and when i try to unlock , he ask to connect a device ...)
any idea how i can fix this problem ?

Thank you
dries

 

[James L]

Samsung devices don't use or have a fastboot option.

 

[mikedt]

Samsung devices don't use or have a fastboot option.

Could be the OP is trying to unlock and/or root this Samsung with incorrect information? In which case, @driesdep STOP NOW! ...before you possibly brick and kill it. What is it exactly you're trying to do with your tablet?

 

[Hadron]

In any event fastboot and ADB require the device to be in different modes, so no phone or tablet will respond to both ADB and fastboot commands at the same time.

 

[driesdep]

i want to install the lineage OS

 

[driesdep]

if i type only fastboot, then i can see all the options from fastboot ... (but fastboot devices doesn't work)

 

[shauny13]

If fastboot can't find your device it's a driver issue.

 

[mikedt]

i want to install the lineage OS

Are you following the directions for Samsung Galaxy Tab S from here...
https://download.lineageos.org/
...or somewhere else?


Samsung devices have something called "download mode" and NOT fastboot.

 

[Hadron]

if i type only fastboot, then i can see all the options from fastboot ... (but fastboot devices doesn't work)

That's the fastboot command telling you what the options are. It will do that even if there is no device connected.

James has said above that Samsung devices don't use fastboot (Samsung always do things differently). You use different tools to flash things to them (the name "Odin" comes to mind). So you need to find a recipe for your device, not a procedure for other devices or manufacturers.

(I've never attempted to mod the only Samsung I own, a Note 10.1, so can't advise on how to do this).

 

[driesdep]

i had already a TWRP install on my tablet. So i could install the leneage fairly easy. I didn't went anymore to the fastboot option ...
On the installation, the GAPPS wasn't installed (i couldn't found any playstore anymore),
but i hope i will find also a solution for this ...

Anywhere, thanks for everything .
(But i still have a lot of things to discover )) )

Thank you
dries

 

[driesdep]

i had already a TWRP install on my tablet. So i could install the leneage fairly easy. I didn't went anymore to the fastboot option ...
On the installation, the GAPPS wasn't installed (i couldn't found any playstore anymore),
but i hope i will find also a solution for this ...

Anywhere, thanks for everything .
(But i still have a lot of things to discover )) )

Thank you
dries

 

[Hadron]

Gapps is easy, and indeed Lineage themselves tell you how to do it: https://wiki.lineageos.org/gapps.html