Hi. On Fri, Mar 30, 2018 at 11:50:46AM +0200, to...@tuxteam.de wrote: > On Fri, Mar 30, 2018 at 04:50:06AM -0300, rv riveravaldez wrote: > > On Thu, Mar 29, 2018 at 11:28 PM, Stefan Monnier > > <monn...@iro.umontreal.ca> wrote: > > >> I'm running with a 'nouveau.noaccel=1' kernel parameter added at hand > > > [...] > > >> Is there any way to deactivate and reactivate such a parameter without > > >> the need to reboot? > > > > > > You can try and change it with > > > > > > # echo 0 > /sys/modules/<MODULENAME>/parameters/noaccel > > > > > > > > > -- Stefan > > > > Hi, thanks a lot. > > > > I tried it in both situations with same result. > > > > Deactivate: > > > > # cat /sys/module/nouveau/parameters/noaccel > > 1 > > # echo 0 > /sys/module/nouveau/parameters/noaccel > > bash: /sys/module/nouveau/parameters/noaccel: Permiso denegado > > > > Activate: > > > > # cat /sys/module/nouveau/parameters/noaccel > > 0 > > # echo 1 > /sys/module/nouveau/parameters/noaccel > > bash: /sys/module/nouveau/parameters/noaccel: Permiso denegado > > > > > > 'Permiso denegado' means 'Permission denied'. > > > > > > What else shoud/could I do? > > You have to be root to change those things. Try > > sudo bash -c "echo 0 > /sys/module/nouveau/parameters/noaccel" > > It will ask you for your password.
It won't do any good, because: # ls -al /sys/module/nouveau/parameters/noaccel -r-------- 1 root root 4096 Mar 30 14:37 /sys/module/nouveau/parameters/noaccel Permissions of '400' in these case mean that its impossible to change this module parameter via /sys (and changing them to 600 won't work either). So, to answer the original question - yes, the reboot is required. Reco
