reset the irq 0 timer after APM suspend
Hello, On my AST J50 (P133) notebook, the timer on irq 0 resets itself from interrupting at 100 Hz to 18.3 Hz (DOS default) after a suspend/resume. What is the right way to re-initialize it back to 100 Hz without a reboot? Thanks, Dong Chen chen@ctp.mit.edu --------------------------------------------------------------------- BTW, I tried to modify linux/drivers/char/apm_bios.c in function suspend() at line 639 (kernel 2.0.30) from err = apm_set_power_state(APM_STATE_SUSPEND); if (err) apm_error("suspend", err); set_time(); to err = apm_set_power_state(APM_STATE_SUSPEND); if (err) apm_error("suspend", err); save_flags(flags); cli(); /* set the clock to 100 Hz */ outb_p(0x34,0x43); /* binary, mode 2, LSB/MSB, ch 0 */ outb_p(LATCH & 0xff , 0x40); /* LSB */ outb(LATCH >> 8 , 0x40); /* MSB */ restore_flags(flags); set_time(); But this does not work. All programs crash after suspend() is called. |
