[j-nsp] SSB i2c PS error

[Jonas Frey]

Hello,

since today i'am getting the following errors on one of my M20's:
Sep 21 02:59:58  ssb PS: I2C error reading status, PS A (1) 
Sep 21 02:59:59  ssb PCF8584(RD): target ack timeout 
Sep 21 02:59:59  ssb PCF8584(RD): (i2c_s1=0x08, group=0x3, device=0x21) 

The powersupply A has power and the "DC OK" led is lit. (Its an AC power
supply).

The RE is reporting that there is no power on supply A and the above
error repeats every second. 

Going back in time i've notice that the supply had a hickup this night
but came back fine but after a short time went nuts (see: it reports
both supplys not provinding power, huh???):

Sep 21 01:22:05   craftd[2700]:  Major alarm set, Power Supply A not
providing power
Sep 21 01:22:05   alarmd[2699]: Alarm set: Pwr supply color=RED,
class=CHASSIS, reason=Power Supply A not providing power 
Sep 21 01:22:05   alarmd[2699]: Alarm set: Pwr supply color=RED,
class=CHASSIS, reason=Power Supply B not providing power 
Sep 21 01:22:05   craftd[2700]: forwarding display request to chassisd:
type = 4, subtype = 43
Sep 21 01:22:05   craftd[2700]:  Major alarm set, Power Supply B not
providing power
Sep 21 01:22:05   craftd[2700]: forwarding display request to chassisd:
type = 4, subtype = 43
Sep 21 01:22:05   ssb PCF8584(RD): ack failure on 2nd last byte 
Sep 21 01:22:05   ssb PCF8584(RD): (i2c_s1=0x91, group=0x3, device=0x21)
Sep 21 01:22:05   ssb PS: I2C error reading status, PS A (1) 
Sep 21 01:22:05   ssb PCF8584(RD): target ack timeout 
Sep 21 01:22:05   ssb PCF8584(RD): (i2c_s1=0x09, group=0x3, device=0x20)
Sep 21 01:22:05   ssb PS: I2C error reading status, PS B (1) 
Sep 21 01:22:06   ssb CM(0): ALARM SET: (Major) Power Supply A not
providing power 
Sep 21 01:22:06   ssb CM(0): ALARM SET: (Major) Power Supply B not
providing power 
Sep 21 01:22:06   craftd[2700]: Major alarm cleared, Power Supply A not
providing power
Sep 21 01:22:06   alarmd[2699]: Alarm cleared: Pwr supply color=RED,
class=CHASSIS, reason=Power Supply A not providing power 
Sep 21 01:22:06   craftd[2700]: forwarding display request to chassisd:
type = 4, subtype = 44
Sep 21 01:22:06   alarmd[2699]: Alarm cleared: Pwr supply color=RED,
class=CHASSIS, reason=Power Supply B not providing power 
Sep 21 01:22:06   ssb CM(0): ALARM CLEAR: Power Supply A not providing
power 
Sep 21 01:22:06   ssb CM(0): ALARM CLEAR: Power Supply B not providing
power 
Sep 21 01:22:06   craftd[2700]: Major alarm cleared, Power Supply B not
providing power
Sep 21 01:22:06   craftd[2700]: forwarding display request to chassisd:
type = 4, subtype = 44
Sep 21 01:58:35   craftd[2700]:  Major alarm set, Power Supply A not
providing power
Sep 21 01:58:35   alarmd[2699]: Alarm set: Pwr supply color=RED,
class=CHASSIS, reason=Power Supply A not providing power 
Sep 21 01:58:35   craftd[2700]: forwarding display request to chassisd:
type = 4, subtype = 43
Sep 21 01:58:35   ssb PCF8584(RD): target ack timeout 
Sep 21 01:58:35   ssb PCF8584(RD): (i2c_s1=0x08, group=0x3, device=0x21)
Sep 21 01:58:35   ssb PS: I2C error reading status, PS A (1) 
Sep 21 01:58:35   ssb CM(0): ALARM SET: (Major) Power Supply A not
providing power 
Sep 21 01:58:36   ssb PCF8584(RD): target ack timeout 
Sep 21 01:58:36   ssb PCF8584(RD): (i2c_s1=0x08, group=0x3, device=0x21)
Sep 21 01:58:36   ssb PS: I2C error reading status, PS A (1) 
Sep 21 01:58:37   ssb PCF8584(RD): target ack timeout 
(repeats every second from here)

We've tried to simply cycle power on supply A without any effect. Any
ideas on whats going wrong here?

Regards,
Jonas Frey