Hi, Jean, Yes I looked at the the OMAP_Power_management page, but the known problem section doesn't seem to describe my problem. What I am encountering is that the serial console does output correctly after resume, but everything goes south after a few lines, thus, the garbage strings... any ideas？ Han On Wed, Jun 16, 2010 at 4:43 AM, Jean Pihet <jpihet@xxxxxxxxxx> wrote: > Hi, > > On Wed, Jun 16, 2010 at 08:09, Michael Trimarchi > <michael@xxxxxxxxxxxxxxxxxxxxxxx> wrote: >> Han Wang wrote: >>> >>> Hi, >>> >>> I am testing the 2.6.35-rc1 pm branch code on Overo. The system >>> boots ok. (I can provide booting log if that is necessary) However, >>> when I use "echo mem > /sys/power/state" to send overo to sleep and >>> wake it up by enter a key into serial console. I got garbage >>> characters in the serial console, and I can not enter anything into >>> the console anymore. I wonder if anyone has encountered a similar >>> problem, and please give me some suggestion. >>> >>> I have appended command log below. >>> >>> root@overo:~# echo mem > /sys/power/state >>> PM: Syncing filesystems ... done. >>> PM: Preparing system for mem sleep >>> PM: Adding info for No Bus:vcs63 >>> PM: Adding info for No Bus:vcsa63 >>> Freezing user space processes ... (elapsed 0.02 seconds) done. >>> Freezing remaining freezable tasks ... (elapsed 0.01 seconds) done. >>> PM: Entering mem sleep >>> i2c_omap i2c_omap.1: preparing suspend >>> i2c_omap i2c_omap.3: preparing suspend >>> platform overo_lcd: preparing suspend >>> serial8250 serial8250.0: preparing suspend, may wakeup >>> serial8250 serial8250.1: preparing suspend, may wakeup >>> serial8250 serial8250.2: preparing suspend, may wakeup >>> platform omap2-nand: preparing suspend >>> platform musb_hdrc: preparing suspend >>> platform smsc911x.0: preparing suspend >>> platform smsc911x.1: preparing suspend >>> platform omap2_mcspi.1: preparing suspend >>> platform omap2_mcspi.2: preparing suspend >>> platform omap2_mcspi.3: preparing suspend >>> platform omap2_mcspi.4: preparing suspend >>> arm-pmu arm-pmu.0: preparing suspend >>> platform omap_rng: preparing suspend >>> platform omapfb: preparing suspend >>> twl4030_gpio twl4030_gpio: preparing suspend >>> mmci-omap-hs mmci-omap-hs.0: preparing suspend >>> mmci-omap-hs mmci-omap-hs.1: preparing suspend >>> twl_reg twl_reg.17: preparing suspend >>> twl_reg twl_reg.18: preparing suspend >>> twl_reg twl_reg.19: preparing suspend >>> twl4030_usb twl4030_usb: preparing suspend, may wakeup >>> twl_reg twl_reg.6: preparing suspend >>> serial8250 serial8250: preparing suspend >>> mmcblk mmc0:fb2a: legacy suspend >>> serial8250 serial8250: suspend >>> i2c i2c-3: suspend >>> twl_reg twl_reg.6: suspend >>> twl4030_usb twl4030_usb: suspend, may wakeup >>> twl_reg twl_reg.19: suspend >>> twl_reg twl_reg.18: suspend >>> twl_reg twl_reg.17: suspend >>> mmci-omap-hs mmci-omap-hs.1: suspend >>> mmci-omap-hs mmci-omap-hs.0: suspend >>> twl4030_gpio twl4030_gpio: suspend >>> dummy 1-004b: suspend >>> dummy 1-004a: suspend >>> dummy 1-0049: suspend >>> twl 1-0048: suspend, may wakeup >>> i2c i2c-1: suspend >>> platform omapfb: suspend >>> platform omap_rng: suspend >>> arm-pmu arm-pmu.0: suspend >>> platform omap2_mcspi.4: suspend >>> platform omap2_mcspi.3: suspend >>> platform omap2_mcspi.2: suspend >>> platform omap2_mcspi.1: suspend >>> platform smsc911x.1: suspend >>> platform smsc911x.0: suspend >>> platform musb_hdrc: suspend >>> platform omap2-nand: suspend >>> serial8250 serial8250.2: suspend, may wakeup >>> serial8250 serial8250.1: suspend, may wakeup >>> serial8250 serial8250.0: suspend, may wakeup >>> platform overo_lcd: suspend >>> i2c_omap i2c_omap.3: suspend >>> i2c_omap i2c_omap.1: suspend >>> PM: suspend of devices complete after 201.965 msecs >>> serial8250 serial8250: LATE suspend >>> i2c i2c-3: LATE suspend >>> twl_reg twl_reg.6: LATE suspend >>> twl4030_usb twl4030_usb: LATE suspend, may wakeup >>> twl_reg twl_reg.19: LATE suspend >>> twl_reg twl_reg.18: LATE suspend >>> twl_reg twl_reg.17: LATE suspend >>> mmci-omap-hs mmci-omap-hs.1: LATE suspend >>> mmci-omap-hs mmci-omap-hs.0: LATE suspend >>> twl4030_gpio twl4030_gpio: LATE suspend >>> dummy 1-004b: LATE suspend >>> dummy 1-004a: LATE suspend >>> dummy 1-0049: LATE suspend >>> twl 1-0048: LATE suspend, may wakeup >>> i2c i2c-1: LATE suspend >>> platform omapfb: LATE suspend >>> platform omap_rng: LATE suspend >>> arm-pmu arm-pmu.0: LATE suspend >>> platform omap2_mcspi.4: LATE suspend >>> platform omap2_mcspi.3: LATE suspend >>> platform omap2_mcspi.2: LATE suspend >>> platform omap2_mcspi.1: LATE suspend >>> platform smsc911x.1: LATE suspend >>> platform smsc911x.0: LATE suspend >>> platform musb_hdrc: LATE suspend >>> platform omap2-nand: LATE suspend >>> serial8250 serial8250.2: LATE suspend, may wakeup >>> serial8250 serial8250.1: LATE suspend, may wakeup >>> serial8250 serial8250.0: LATE suspend, may wakeup >>> platform overo_lcd: LATE suspend >>> i2c_omap i2c_omap.3: LATE suspend >>> i2c_omap i2c_omap.1: LATE suspend >>> PM: late suspend of devices complete after 103.088 msecs >>> Successfully put all powerdomains to target state >>> i2c_omap i2c_omap.1: EARLY resume >>> i2c_omap i2c_omap.3: EARLY resume >>> platform overo_lcd: EARLY resume >>> serial8250 serial8250.0: EARLY resume >>> serial8250 serial8250.1: EARLY resume >>> serial8250 serial8250.2: EARLY resume >>> platform omap2-nand: EARLY resume >>> platform musb_hdrc: EARLY resume >>> platform smsc911x.0: EARLY resume >>> platform smsc911x.1: EARLY resume >>> platform omap2_mcspi.1: EARLY resume >>> platform omap2_mcspi.2: EARLY resume >>> platform omap2_mcspi.3: EARLY resume >>> platform omap2_mcspi.4: EARLY resume >>> arm-pmu arm-pmu.0: EARLY resume >>> platform omap_rng: EARLY resume >>> platform omapfb: EARLY resume >>> i2c i2c-1: EARLY resume >>> twl 1-0048: EARLY resume >>> dummy 1-0049: EARLY resume >>> dummy 1-004a: EARLY resume >>> dummy 1-004b: EARLY resume >>> twl4030_gpio twl4030_gpio: EARLY resume >>> mmci-omap-hs mmci-omap-hs.0: EARLY resume >>> mmci-omap-hs mmci-omap-hs.1: EARLY resume >>> twl_reg twl_reg.17: EARLY resume >>> twl_reg twl_reg.18: EARLY resume >>> twl_reg twl_reg.19: EARLY resume >>> twl4030_usb twl4030_usb: EARLY resume >>> twl_reg twl_reg.6: EARLY resume >>> i2c i2c-3: EARLY resume >>> serial8250 serial8250: EARLY resume >>> PM: early resume of devices complete after 97.625 msecs >>> i2c_omap i2c_omap.1: resume >>> i2c_omap i2c_omap.3: resume >>> platform overo_lcd: resume >>> serial8250 serial8250.0: resume >>> serial8250 serial8250.1: resume >>> serial8250 serial8250.2: resume >>> >>> ŨuV=V=ý_―hþžþž.?ýRŪHlŌŌūŧŪ=ū=―īŪŋQ*^žþQū99:ūŌŌýRNũõtŪĻĻ:;;Tŧ?ÉQQ·īÖīË\ŋvéÝĸ >>> (garbage string...) >> >> The problem is releated to no_debug_console option. >> >> Michael Trimarchi >> >>> >>> Thanks, > > Did you look at http://elinux.org/OMAP_Power_Management? There is some > info on the current problems with the UART and sleep modes, as well a > workaround for UART wake-up. > > Regards, > Jean > > >> >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-omap" in >> the body of a message to majordomo@xxxxxxxxxxxxxxx >> More majordomo info at http://vger.kernel.org/majordomo-info.html >> > -- Han Wang Electrical and Computer Engineering Cornell University M: 1-607-280-4995 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
