10.10.: no sound

Can yo give the output of:

sudo lshw -C sound

Can you also make sure the gnome volume sliders are cranked and unmuted, then open a terminal and run:

alsamixer

and make sure no levels are muted and all are cranked.

If the system is a branded system or a laptop, can you give it's make / model

Your question is VERY bare and not very helpful but the above points will give us a tonne more information.

Please execute step 2 and then send us the full terminal output from step 3 and step 4 from this procedure (after installing Ubuntu 10.10 to the harddisk):

https://help.ubuntu.com/community/SoundTroubleshootingProcedure

peter@linux:~# sudo lshw -C sound
  *-multimedia
       description: Multimedia audio controller
       product: 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) AC'97 Audio Controller
       vendor: Intel Corporation
       physical id: 1f.5
       bus info: pci@0000:00:1f.5
       version: 01
       width: 32 bits
       clock: 33MHz
       capabilities: pm bus_master cap_list
       configuration: driver=Intel ICH latency=0 module=snd_intel8x0

The volume sliders are ok. Under 8.10 the sound works perfect. Also the ALSA mixer looks ok. The system is a COMPAQ desktop - about 8 years old.

I'll not install 10.10 til the sound works in the test mode.

solved

You should submit a bug to say the sound in 10.10 is bad with your laptop make/model