"Woodruff, Richard" <r-woodru...@ti.com> writes: > Can you ping the system via network during on time?
Yes. > - generate some activity on uart to be awake then try. Yes, ping works before, after and during off-while-idle. > Why not fire up a second tty/shell on UART3 or just try with uart 3 > on SDP. Bootargs change is easy enough. - this can say if you have > uart specific issue or maybe core vs per Indeed, using UART3 on SDP works as expected, only UART 1 has the problem. > Did you hook up your emulator and connect during awake time of uart timer? > It should really tell a lot. Will give that a try. Thanks, Kevin > >> -----Original Message----- >> From: Nayak, Rajendra >> Sent: Wednesday, June 17, 2009 1:12 AM >> To: Kevin Hilman; Woodruff, Richard >> Cc: linux-omap@vger.kernel.org >> Subject: RE: OMAP3 PM: off-mode during idle, problem with UART1 console >> >> Kevin, >> >> What Silicon Rev does your SDP have? I currently am using an ES3.1 based SDP >> and I havent seen any of these issues you have reported with off-while-idle. >> >> Infact I have kept the board running overnight a couple times in the last >> week >> with off-while-idle and voltage scaling to 0v enabled, mainly to test the >> recent >> patch set (disabling Auto idle for PER in scratchpad memory) for stability. >> >> I will see if I can get hold of an ES3 and ES2.1 based SDP's and see if I >> reproduce >> the issue. Besides I use nfs and I am not sure if that's got something to do >> with it. >> Will try a ramdisk also. >> >> Does it take you a while to reproduce this, or is it seen after the very >> first >> UART >> inactivity? >> >> regards, >> Rajendra >> >> >-----Original Message----- >> >From: linux-omap-ow...@vger.kernel.org >> >[mailto:linux-omap-ow...@vger.kernel.org] On Behalf Of Kevin Hilman >> >Sent: Wednesday, June 17, 2009 2:35 AM >> >To: Nayak, Rajendra; Woodruff, Richard >> >Cc: linux-omap@vger.kernel.org >> >Subject: OMAP3 PM: off-mode during idle, problem with UART1 console >> > >> >Rajendra, Richard, >> > >> >Hoping you can shed some light, or give me some direction on where to >> >debug this further... >> > >> >With the latest PM branch, I've notice that off-while idle isn't >> >working on the SDP, but the same kernel works fine on the RX51. >> >RET-while-idle works fine on both. This is with CPUidle disabled, so >> >just using the default idle where MPU and CORE are changed together. >> > >> >More specifically, it seems to be the UART1 (CORE) console that never >> >comes back from off-while-idle, but the UART3 (PER) console on RX51 >> >works. >> > >> >On SDP, if I >> > >> ># echo 1 > /sys/power/enable_off_mode >> ># echo 1 > /sys/power/voltage_off_while_idle >> ># echo 1 > /sys/power/sleep_while_idle >> > >> >After the UART inactivty timeout of 5 seconds, I start to see the >> >sys_off_mode LED toggling between red and green with system timer >> >wakeups. >> > >> >If I then push a key on the UART1 console, the LED goes green, stays >> >for the 5 second UART inactivity and then goes back to toggling >> >red/green again. However, I never get my console back and never see >> >the characters on my console. >> > >> >If I keep typing, I keep the system from going back off (based on >> >sys_off_mode LED) and as soon as I stop typing long enough for the >> >inactivity timer to expiere (5 seconds) it goes back into off. >> > >> >Any ideas what's going on here? >> > >> >On RX51, the same thing works using UART3. >> > >> >Kevin >> > >> >-- >> >To unsubscribe from this list: send the line "unsubscribe >> >linux-omap" in >> >the body of a message to majord...@vger.kernel.org >> >More majordomo info at http://vger.kernel.org/majordomo-info.html >> > >> > -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
