no proper sound system & comment on aspire notebook

i have a
Acer Aspire 5253-E354G50Mn (LX.RD502.012)
Ordinateur portable noir avec écran 15"6 - Processeur AMD E-Series E-350- Mémoire 4096 Mo - 500 Go - Carte graphique ATI Radeon™ HD 6310 Graphics (512 Mo) - Port HDMI - Graveur de DVD±RW - Lecteur de cartes 2 en 1 - Wifi 802.11 b/g/n - Windows 7 Familiale Premium 64-bit - Clavier AZERTY

i have no sound on headphone, and when i plug the headphone the laptop sound don't shut up

with 10.10 the outside sound shut up with headphone working ...

here just a comment about the screen thing : i found very stupid to have no choice in the gtk interface about the color deaph - the color is only availaible in 24bit - and i would like to select the deapth in the screen option window such as : 24 - 16 - 8 bit
also i misse a small color tuning in that window, very simple rgb tuning.

Take care !

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: gnome-power-manager 2.32.0-2ubuntu2
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic x86_64
Architecture: amd64
Date: Sun Apr 17 23:09:52 2011
ExecutablePath: /usr/bin/gnome-power-manager
GnomeSessionIdleInhibited: Unknown
GnomeSessionInhibitors: Failed to acquire
GnomeSessionSuspendInhibited: Unknown
MachineType: Acer Aspire 5253
ProcCmdline: gnome-power-manager
ProcEnviron:
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-8-generic root=UUID=771dd84f-193f-41d2-9204-2cb2682f14a0 ro quiet splash vt.handoff=7
SegvAnalysis:
 Segfault happened at: 0x7f5a503dd0e4 <fclose+4>: mov (%rdi),%ecx
 PC (0x7f5a503dd0e4) ok
 source "(%rdi)" (0x00000000) not located in a known VMA region (needed readable region)!
 destination "%ecx" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: gnome-power-manager
StacktraceTop:
 fclose () from /lib/x86_64-linux-gnu/libc.so.6
 ?? ()
 g_type_create_instance () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
 ?? () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
 g_object_newv () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
Title: gnome-power-manager crashed with SIGSEGV in fclose()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:

dmi.bios.date: 12/09/2010
dmi.bios.vendor: Acer
dmi.bios.version: V1.02
dmi.board.name: Aspire 5253
dmi.board.vendor: Acer
dmi.board.version: V1.02
dmi.chassis.type: 10
dmi.chassis.vendor: Chassis Manufacturer
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnAcer:bvrV1.02:bd12/09/2010:svnAcer:pnAspire5253:pvrV1.02:rvnAcer:rnAspire5253:rvrV1.02:cvnChassisManufacturer:ct10:cvrChassisVersion:
dmi.product.name: Aspire 5253
dmi.product.version: V1.02
dmi.sys.vendor: Acer