#10976 NORM 1.75-so: Camera driver: system freezes after a few minutes of video streaming to ximagesink

[Zarro Boogs per Child]

#10976: Camera driver: system freezes after a few minutes of video streaming to
ximagesink
---------------------------------------+------------------------------------
           Reporter:  martin.langhoff  |       Owner:  corbet       
               Type:  defect           |      Status:  new          
           Priority:  normal           |   Milestone:  1.75-software
          Component:  kernel           |     Version:  1.75-A2      
         Resolution:                   |    Keywords:               
        Next_action:  never set        |    Verified:  0            
Deployment_affected:                   |   Blockedby:               
           Blocking:                   |  
---------------------------------------+------------------------------------
Changes (by martin.langhoff):

 * cc: lennert (added)


Comment:

 The freeze is of the entire system.

 So this repros with a kernel built from the tip of linux-2.6.39 from
 git://dev.laptop.org/xo1.75-kernel-bringup (note Lennert's commit).

 When I am typing in a gnome terminal window while gstreamer is running,
 and after a few minutes the system returns to normal. Looks related to
 #10945 .

 cjb and lennert request a trace with the following technique.

 {{{
   <cjb> you need to turn on:
   <cjb> CONFIG_FUNCTION_TRACER=y
   <cjb> CONFIG_FUNCTION_GRAPH_TRACER=y
   <cjb> then:
   <cjb> mount -o debugfs debugfs /sys/kernel/debug
   <cjb> cd /sys/kernel/debug/tracing
   <cjb> echo function_graph > current_tracer
   <cjb> echo 1 > tracing_on
   <cjb> echo 1 > tracing_enabled; sleep 2; echo 0 > tracing_enabled
   <cjb> then try to reproduce during the two second window
   <cjb> then the trace is in /sys/kernel/debug/trace
 }}}

-- 
Ticket URL: <http://dev.laptop.org/ticket/10976#comment:3>
One Laptop Per Child <http://laptop.org/>
OLPC bug tracking system