Hi all, Thank you Brian Mullan. Your Command has solved my problem. info Dell 740 with Nvidia. MyUserHome@Ubuntu1304:~$ cat .xsession-errors Script for cjkv started at run_im. Script for default started at run_im. Script for cjkv started at run_im. Script for default started at run_im. compiz (core) - Info: Loading plugin: core compiz (core) - Info: Starting plugin: core compiz (core) - Info: Loading plugin: ccp compiz (core) - Info: Starting plugin: ccp compiz (core) - Info: Loading plugin: composite compiz (core) - Info: Starting plugin: composite compiz (core) - Info: Loading plugin: compiztoolbox compiz (core) - Info: Starting plugin: compiztoolbox compiz (core) - Error: Plugin 'opengl' not loaded. compiz (core) - Info: Loading plugin: decor compiz (core) - Info: Starting plugin: decor compiz (core) - Info: Loading plugin: gnomecompat compiz (core) - Info: Starting plugin: gnomecompat compiz (core) - Info: Loading plugin: resize compiz (core) - Info: Starting plugin: resize compiz (core) - Info: Loading plugin: snap compiz (core) - Info: Starting plugin: snap compiz (core) - Info: Loading plugin: vpswitch compiz (core) - Info: Starting plugin: vpswitch compiz (core) - Info: Loading plugin: imgpng compiz (core) - Info: Starting plugin: imgpng compiz (core) - Info: Loading plugin: mousepoll compiz (core) - Info: Starting plugin: mousepoll compiz (core) - Info: Loading plugin: place compiz (core) - Info: Starting plugin: place compiz (core) - Info: Loading plugin: grid compiz (core) - Info: Starting plugin: grid compiz (core) - Info: Loading plugin: regex compiz (core) - Info: Starting plugin: regex compiz (core) - Info: Loading plugin: move compiz (core) - Info: Starting plugin: move compiz (core) - Info: Loading plugin: session compiz (core) - Info: Starting plugin: session I/O warning : failed to load external entity "/home/MyUserHome/.compiz/session/1019cb1c48f3c2df7f137161092010398300000026420030" compiz (core) - Info: Loading plugin: workarounds compiz (core) - Info: Starting plugin: workarounds compiz (core) - Error: Plugin 'opengl' not loaded. ** Message: applet now removed from the notification area ** Message: using fallback from indicator to GtkStatusIcon (nautilus:2769): GLib-GObject-CRITICAL **: g_object_set: assertion `G_IS_OBJECT (object)' failed (nautilus:2769): GLib-GObject-CRITICAL **: g_object_set: assertion `G_IS_OBJECT (object)' failed compiz (decor) - Warn: No default decoration found, placement will not be correct compiz (core) - Warn: Attempted to restack relative to 0x1000013 which is not a child of the root window or a window compiz owns ** (nautilus:2769): WARNING **: Error calling current_status: Method "current_status" with signature "" on interface "com.ubuntuone.SyncDaemon.Status" doesn't exist ** (nautilus:2769): CRITICAL **: syncdaemon_status_info_get_online: assertion `SYNCDAEMON_IS_STATUS_INFO (sinfo)' failed MyUserHome@Ubuntu1304:~$ ll /home/MyUserHome/.compiz/session/1019cb1c48f3c2df7f137161092010398300000026420030 ls: nelze přistoupit k /home/MyUserHome/.compiz/session/1019cb1c48f3c2df7f137161092010398300000026420030: Adresář nebo soubor neexistuje MyUserHome@Ubuntu1304:~$ MyUserHome@Ubuntu1304:~$ lscpu Architecture: x86_64 Operační režim(y) CPU:32-bit, 64-bit Byte Order: Little Endian CPU(s): 2 On-line CPU(s) list: 0,1 Vláken na jádro: 1 Jader na patici: 2 Socket(s): 1 Uzly NUMA: 1 ID výrobce: AuthenticAMD Rodina CPU: 15 Model: 107 Stepping: 2 CPU MHz: 1000.000 BogoMIPS: 2004.16 Virtualizace: AMD-V L1d cache: 64K L1i cache: 64K L2 cache: 512K NUMA node0 CPU(s): 0,1 MyUserHome@Ubuntu1304:~$ uname -a Linux Ubuntu1304 3.8.0-25-generic #37-Ubuntu SMP Thu Jun 6 20:47:07 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux MyUserHome@Ubuntu1304:~$ lsmod |grep -i vid nvidia 11309139 54 MyUserHome@Ubuntu1304:~$ pa@Ubuntu1304:~$ lspci |grep -i vid 00:00.0 RAM memory: NVIDIA Corporation C51 Host Bridge (rev a2) 00:00.1 RAM memory: NVIDIA Corporation C51 Memory Controller 0 (rev a2) 00:00.2 RAM memory: NVIDIA Corporation C51 Memory Controller 1 (rev a2) 00:00.3 RAM memory: NVIDIA Corporation C51 Memory Controller 5 (rev a2) 00:00.4 RAM memory: NVIDIA Corporation C51 Memory Controller 4 (rev a2) 00:00.5 RAM memory: NVIDIA Corporation C51 Host Bridge (rev a2) 00:00.6 RAM memory: NVIDIA Corporation C51 Memory Controller 3 (rev a2) 00:00.7 RAM memory: NVIDIA Corporation C51 Memory Controller 2 (rev a2) 00:02.0 PCI bridge: NVIDIA Corporation C51 PCI Express Bridge (rev a1) 00:03.0 PCI bridge: NVIDIA Corporation C51 PCI Express Bridge (rev a1) 00:04.0 PCI bridge: NVIDIA Corporation C51 PCI Express Bridge (rev a1) 00:05.0 VGA compatible controller: NVIDIA Corporation C51 [GeForce 6150 LE] (rev a2) 00:09.0 RAM memory: NVIDIA Corporation MCP51 Host Bridge (rev a2) 00:0a.0 ISA bridge: NVIDIA Corporation MCP51 LPC Bridge (rev a3) 00:0a.1 SMBus: NVIDIA Corporation MCP51 SMBus (rev a3) 00:0a.2 RAM memory: NVIDIA Corporation MCP51 Memory Controller 0 (rev a3) 00:0b.0 USB controller: NVIDIA Corporation MCP51 USB Controller (rev a3) 00:0b.1 USB controller: NVIDIA Corporation MCP51 USB Controller (rev a3) 00:0e.0 IDE interface: NVIDIA Corporation MCP51 Serial ATA Controller (rev a1) 00:0f.0 IDE interface: NVIDIA Corporation MCP51 Serial ATA Controller (rev a1) 00:10.0 PCI bridge: NVIDIA Corporation MCP51 PCI Bridge (rev a2) 00:10.1 Audio device: NVIDIA Corporation MCP51 High Definition Audio (rev a2) MyUserHome@Ubuntu1304:~$