On Sun, 2 May 2010, Bruno [UTF-8] Prémont wrote: > Hi, > > On a IEI Kino 690S1 I'm having a hard time to get s2ram running. > It freezes during device suspend (unless I rmmod everything USB > related) - usb fails even in pm_test case 'devices'. > > When the system is able to suspend it takes an eternity (more than 3 > minutes to wake-up, the radeon apparently being responsible for quite > a big share of that slowness. > > > During resume early it looks like every PCI access needs about a second, > and there are a few cases where during lots of seconds nothing seems to > happen and the first event following is related to radeon. > > The kernel used is todays Linus's tree at commit be1066bbcd443a65df312fdecea7e4959adedb45 > with Dave's drm-linus and drm-radeon-testing applied on top. > > Note, I've not been able to suspend to RAM properly recently (last one > that worked correctly but resumed without graphics was some-when during > 2.6.2x, before KMS) > Since then the system would either fail suspend or resume. > > Manual changes I applied in order to find out some context information: > - add a few debugging printk's to ata/ahci as that was the last entry > on serial console for freezing suspends (that one succeeded but > following step never completed, from suspend_prepare that would have > been USB => unload usb before suspend) > - strip "if EMBEDED" from CONFIG_SERIAL_8250_PNP and disabled it so serial > console would continue working as long as possible and output suspend > progress (resume output happens only very late) > > Is there some additional information I could gather in order do help > improving s2ram on this system? > - get it to suspend with usb loaded (ohci + ehci) > - get it to resume a reasonable speed There's no way to fix the USB problem without knowing what goes wrong. Let's see how far you get before the system freezes on a kernel with CONFIG_USB_DEBUG enabled. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
