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Cisco Bug: CSCvt22554 - 8832 phone reboot intermittently due to MALI GPU timeout.

Last Modified

Apr 29, 2020

Products (13)

  • Cisco IP Phone 8800 Series
  • Cisco IP Phone 8865
  • Cisco IP Phone 8851
  • Cisco IP Phone 7841
  • Cisco IP Conference Phone 7832
  • Cisco IP Phone 7821
  • Cisco IP Phone 8811
  • Cisco IP Phone 8845
  • Cisco IP Phone 7861
  • Cisco IP Phone 8861
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Known Affected Releases

12.6(1)

Description (partial)

Symptom:
customer has around 160+ 8832 phones in different location.  there were around 2-3 phones reboot every week.   

as customer noticed, the phone was on call and they can hear "du du du" noise before phone reboot, also with UI stuck (time on screen was stuck, pressed any button but still stuck.)    after around 45 seconds and phone rebooted.

In PRT file, watchdog timeout detected with following error:

[ 6.199166] SYSCFG Reboot count for cause: Host Watchdog reset = 2 (max 3)

reset number could be 1,2,3.  


In ramoops (kernel dump), following log will be printed.
[203860.221295] sti-asoc-tdm-uni 8d81000.snd-uni-player: FIFO error!
[203860.227451] sti-asoc-tdm-uni 8d83000.snd-uni-reader: FIFO error!
[203865.224878] Mali<2>: Group: timeout handler for Mali_GP at 20356522
[203865.231344] Mali: Executor GP: Job 141650 Timeout on Mali_GP

Conditions:
the phone can be reboot in the meeting or even in idle state.  even tried 12.5SR2 and 12.6, still same.
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