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Date: Thu, 27 Mar 2008 22:11:04 -0400 From: Mark Lord <lkml@....ca> To: Greg KH <gregkh@...e.de> Cc: jkosina@...e.cz, Linux Kernel <linux-kernel@...r.kernel.org>, linux-usb@...r.kernel.org, Pavel Machek <pavel@...e.cz>, Andrew Morton <akpm@...ux-foundation.org> Subject: Re: 2.6.25-rc7: Ugh. Greg KH wrote: > On Thu, Mar 27, 2008 at 11:29:27AM -0400, Mark Lord wrote: >> It is with great reluctance when I attempt moving my main "desktop" >> over to a new kernel version -- because the USB subsystem seems to >> break every single time. > > That's not good, why not tell the linux-usb developers this? (added to > the cc:) > >> So today I tried 2.6.25-rc7 on it for the first time. >> Not good. >> >> It boots, but just a simple suspend/resume (RAM) was enough to kill it. >> It comes back on resume, with an X desktop again, >> but with no USB functionality -- no mouse. >> >> The keyboard still works, so I dropped to a console and tried: >> >> rmmod usbhid >> insmod usbhid >> >> And the console hung at 100% CPU on the insmod. .. Okay, correction there: it just hangs the console, but not 100% CPU. Other tasks still continue running. Same thing happens when I rmmod usbhid, and then rmmod ehci_hcd. The rmmod ehci_hcd hangs. But since the rest of the system is still alive, including the non-USB touchpad(!), here is the alt-sysrq-t from syslog: rmmod D f74c2ddc 0 4538 4492 f6d3b200 00000086 f74c2c90 f74c2ddc c281e840 00000001 c01131be 00000000 00000001 c0324a00 c0324a00 00000000 00000001 7fffffff 7fffffff f653cea8 00000002 c02906f8 00000000 00000012 c038f6aa 00000086 c011aa05 00000000 Call Trace: [__wake_up_common+46/88] __wake_up_common+0x2e/0x58 [schedule_timeout+19/134] schedule_timeout+0x13/0x86 [wake_up_klogd+43/45] wake_up_klogd+0x2b/0x2d [wait_for_common+205/308] wait_for_common+0xcd/0x134 [default_wake_function+0/8] default_wake_function+0x0/0x8 [__cancel_work_timer+237/312] __cancel_work_timer+0xed/0x138 [wq_barrier_func+0/8] wq_barrier_func+0x0/0x8 [<f889f684>] usb_remove_hcd+0x63/0xd7 [usbcore] [<f88a858e>] usb_hcd_pci_remove+0x15/0x68 [usbcore] [pci_device_remove+22/53] pci_device_remove+0x16/0x35 [__device_release_driver+88/118] __device_release_driver+0x58/0x76 [driver_detach+122/182] driver_detach+0x7a/0xb6 [bus_remove_driver+96/126] bus_remove_driver+0x60/0x7e [pci_unregister_driver+30/95] pci_unregister_driver+0x1e/0x5f [sys_delete_module+388/445] sys_delete_module+0x184/0x1bd [remove_vma+49/54] remove_vma+0x31/0x36 [do_page_fault+506/1232] do_page_fault+0x1fa/0x4d0 [sysenter_past_esp+95/133] sysenter_past_esp+0x5f/0x85 ======================= If nothing else, this should point to where USB is getting deadlocked. ?? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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