Ok, here is some output from before and after using media player to confirm the error: before: ~ $ dmesg | grep -i dsp [72488.763397] procwrap_detach: deprecated dspbridge ioctl [72493.660552] procwrap_detach: deprecated dspbridge ioctl [72496.959869] procwrap_detach: deprecated dspbridge ioctl [72500.956970] procwrap_detach: deprecated dspbridge ioctl [72504.140106] procwrap_detach: deprecated dspbridge ioctl [72507.256866] procwrap_detach: deprecated dspbridge ioctl [72510.676452] procwrap_detach: deprecated dspbridge ioctl [72513.418975] procwrap_detach: deprecated dspbridge ioctl [72516.471405] procwrap_detach: deprecated dspbridge ioctl [72518.272705] procwrap_detach: deprecated dspbridge ioctl [72595.205291] procwrap_detach: deprecated dspbridge ioctl [72600.619934] procwrap_detach: deprecated dspbridge ioctl [72681.125183] procwrap_detach: deprecated dspbridge ioctl after: ~ $ dmesg | grep -i dsp [72488.763397] procwrap_detach: deprecated dspbridge ioctl [72493.660552] procwrap_detach: deprecated dspbridge ioctl [72496.959869] procwrap_detach: deprecated dspbridge ioctl [72500.956970] procwrap_detach: deprecated dspbridge ioctl [72504.140106] procwrap_detach: deprecated dspbridge ioctl [72507.256866] procwrap_detach: deprecated dspbridge ioctl [72510.676452] procwrap_detach: deprecated dspbridge ioctl [72513.418975] procwrap_detach: deprecated dspbridge ioctl [72516.471405] procwrap_detach: deprecated dspbridge ioctl [72518.272705] procwrap_detach: deprecated dspbridge ioctl [72595.205291] procwrap_detach: deprecated dspbridge ioctl [72600.619934] procwrap_detach: deprecated dspbridge ioctl [72681.125183] procwrap_detach: deprecated dspbridge ioctl [73120.365417] ***** DSPMMU FAULT ***** IRQStatus 0x2 [73120.365447] ***** DSPMMU FAULT ***** fault_addr 0x72461240 [73120.365509] bridge_deh_notify: DSP_MMUFAULT,err_info = 0x0 [73120.365539] bridge_deh_notify: DSP_MMUFAULT, High Address = 0x7246 [73120.365539] bridge_deh_notify: DSP_MMUFAULT, Low Address = 0x1240 [73120.365570] bridge_deh_notify: DSP_MMUFAULT, fault address = 0x72461240 [73120.365753] print_dsp_trace_buffer: [73120.365844] bridge_deh_notify: DSP_SYSERROR, err_info = 0x102 [73120.365905] print_dsp_trace_buffer: [73120.365966] bridge_deh_notify: DSP_SYSERROR, err_info = 0x102 [73120.366027] print_dsp_trace_buffer: [73120.366088] bridge_deh_notify: DSP_SYSERROR, err_info = 0x102 [73120.366149] print_dsp_trace_buffer: [73120.373382] procwrap_detach: deprecated dspbridge ioctl batter graph in the attached file. Using media server was around 13.15 at teh end of the graph. not much usage before and after (some emails, no calls, no surfing). Will post another battery graph after an hour to see if the decline continues. Hope that helps in identifying the problem.