[GRASS-user] problem in getting r.in.gdal to work

[Umberto Filippo Minora]

I am having problem in importing tif rasters in GRASS.
When I try a command like

     r.in.gdal input= raster1 output= raster2

being "raster1" my .tif file (I can open it in qgis), the console 
outputs this message

     ERROR 4: `/home/umberto/Documenti/unimi/ppg/summer_at_home/d
     ebris/Debris_Mask.tif' not recognised as a supported file
     format.

What would be the problem in my case?
I am a very beginner user of GRASS, hope someone could help me.