Help: desktop freezes randomly

[keivan]

I'm using LMDE from the first version. few days ago I've updated it to "update pack 4". cinnamon is my default desktop. now desktop freezes randomly. When I say random I mean most of the time I can work few hours but after that desktop freezes and some times it happen soon.

When desktop freezes I can see the mouse cursor and windows but I can't click on them but tasks continue to the end. for example when I was compiling the vanilla kernel although desktop was freezed but compile continued to end (I was using gnome terminal!!!).

Also, I can enter to shell (ctrl+alt+F1) and I can stop gdm3 and start it again.

Is there any suggestion or even solution to this problem?
Do you have any idea how I can track the source of this problem?
How I can understand what was the error when freeze happened?
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some error logs:
0-greeter.log

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** (at-spi-registryd:4119): DEBUG: Client registered with session manager: /org/gnome/SessionManager/Client1
Gtk-Message: Failed to load module "atk-bridge"
gnome-session[4083]: WARNING: Failed to start app: Unable to start application: Failed to execute child process "gnome-power-manager" (No such file or directory)
Gtk-Message: Failed to load module "atk-bridge"
** (process:4152): DEBUG: Greeter session pid=4152 display=:0 xauthority=/var/run/gdm3/auth-for-Debian-gdm-gmb8Vu/database
Failed to play sound: File or data not found
Window manager warning: Fatal IO error 11 (Resource temporarily unavailable) on display ':0'.
Window manager warning: Log level 16: Failed to send buffer
Window manager warning: Log level 16: Failed to send buffer
Window manager warning: Could not find display for X display 0x8bdc328, probably going to crash
Bug in window manager: IO error received for unknown display?
gnome-session[4083]: WARNING: Application 'at-spi-registryd-wrapper.desktop' killed by signal
g_dbus_connection_real_closed: Remote peer vanished with error: Underlying GIOStream returned 0 bytes on an async read (g-io-error-quark, 0). Exiting.
gnome-session[4083]: Gdk-WARNING: gnome-session: Fatal IO error 11 (Resource temporarily unavailable) on X server :0.


(gnome-settings-daemon:4117): Gdk-WARNING **: gnome-settings-daemon: Fatal IO error 11 (Resource temporarily unavailable) on X server :0.

gdm-simple-greeter[4152]: WARNING: GetDisplayId org.freedesktop.DBus.Error.NoReply raised: Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken.

gdm-simple-greeter[4152]: Gdk-WARNING: gdm-simple-greeter: Fatal IO error 2 (No such file or directory) on X server :0.

[keivan]

I've found a temporary solution to the problem and I'm still testing it. Because I was suspicious about the open source driver of ATI graphic cards during 3D acceleration, I tried to force my graphic card into maximum compatibility settings. Previously I was relied completely on the KMS for management of my GPU. So I decided to force the KMS to the maximum compatibility mode using xorg.conf file. so I made a xorg.conf file with only following lines.

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sudo gedit /etc/X11/xorg.conf

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Section "Device"
   Identifier         "Radeon"
   Driver            "radeon"

   Option "EXAPixmaps"      "off"
   Option "AccelDFS"      "off"
   Option "MigrationHeuristic"   "greedy"
EndSection


This configuration helped me a lot. Although I'm still testing my desktop but everything is so far so good.
For more information about the configuration of the ATI cards I refer you to the archlinux wiki about open source driver of ATI.