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    SubjectRe: PROBLEM: "BUG:" when resuming from suspend-to-ram
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    On Tue, 2007-02-27 at 23:30 +0100, Rafael J. Wysocki wrote:
    > On Tuesday, 27 February 2007 23:04, Rafael J. Wysocki wrote:
    > > Hi,
    > >
    > > On Tuesday, 27 February 2007 19:45, Kristian Grønfeldt Sørensen wrote:
    > > > Hi.
    > > >
    > > > PROBLEM: "BUG:" when resumimg from suspend-to-ram
    > > >
    > > > My laptop have a problem with resuming from suspend-to-ram.
    > > > It does not occur every time - most of the time, resume works without
    > > > any problem.at all.
    > > >
    > > > After it occurs, the laptop refuses to go into suspend-to-ram mode until
    > > > next reboot.
    > >
    > > What do you mean by "refuses"? Are there any suspicious messages in
    > > dmesg?
    > >
    > > > The system is a Debian unstable running with a self-compiled 2.6.20
    > > > kernel downloaded from kernel.org.
    > > >
    > > > I've only tried suspend-to-ram on 2.6.20 so I don't know whether or not
    > > > other versions might have the same problem.
    > > >
    > > > I'm not subscribed to the list. Please CC me.
    > >
    > > I guess one of the drivers you use goes awry at some point. Please provide
    > > us with more information (like dmesg output after a failing resume).
    >
    > I'm sorry, I've just been told you sent it. :-)
    >
    > > CLASS: Unregistering class device. ID = 'event3'
    > > class_uevent - name = event3
    > > class_device_create_uevent called for event3
    > > device class 'event3': release.
    > > class_device_create_release called for event3
    > > BUG: unable to handle kernel paging request at virtual address 6b6b6b6b
    > > printing eip:
    > > f8825a81
    > > *pde = 00000000
    > > Oops: 0000 [#1]
    > > PREEMPT
    > > Modules linked in: tg3 battery ac thermal fan button i915 drm binfmt_misc
    > > rfcomm l2cap ipv6 fuse capability commoncap cpufreq_performance aoe
    > > af_packet nls_utf8 ntfs nls_iso8859_1 nls_cp437 vfat fat dm_snapshot
    > > dm_mirror dm_mod ieee80211_cr ypt_tkip ieee80211_crypt pd6729 snd_seq_dummy
    > > snd_seq_oss snd_seq_midi snd_rawmi di snd_seq_midi_event snd_seq
    > > snd_seq_device sermouse hci_vhci hci_uart wbsd mmc _block mmc_core tun msr
    > > cpuid cpufreq_stats container video speedstep_lib speeds tep_centrino
    > > processor sr_mod sbp2 scsi_mod ide_cd cdrom eth1394 hci_usb bluetoo th
    > > pcmcia firmware_class irda snd_intel8x0m snd_intel8x0 snd_ac97_codec
    > > crc_ccit t ac97_bus snd_pcm_oss snd_mixer_oss rtc i2c_i801 snd_pcm
    > > snd_timer ohci1394 iee e1394 i2c_core serio_raw intel_agp iTCO_wdt snd
    > > soundcore snd_page_alloc ehci_hc d pcspkr uhci_hcd yenta_socket
    > > rsrc_nonstatic pcmcia_core usbcore agpgart moused ev evdev
    > > CPU: 0
    > > EIP: 0060:[<f8825a81>] Not tainted VLI
    > > EFLAGS: 00010202 (2.6.20-x300 #1)
    > > EIP is at evdev_disconnect+0xb1/0xe0 [evdev]
    >
    > This points us to a suspect. Can you please run "gdb vmlinux" against the
    > vmlinux in your kernel sources directory and then
    >
    > gdb> l *evdev_disconnect+0xb1

    OK. Recopiled the kernel with CONFIG_DEBUG_INFO=y

    This gives:

    (gdb) l *evdev_disconnect+0xb1
    No symbol "evdev_disconnect" in current context.

    I guess you meant gdb drivers/input/evdev.ko

    This gives:

    (gdb) l *evdev_disconnect+0xb1
    0xa81 is in evdev_disconnect (include/asm/processor.h:716).
    711 However we don't do prefetches for pre XP Athlons currently
    712 That should be fixed. */
    713 #define ARCH_HAS_PREFETCH
    714 static inline void prefetch(const void *x)
    715 {
    716 alternative_input(ASM_NOP4,
    717 "prefetchnta (%1)",
    718 X86_FEATURE_XMM,
    719 "r" (x));
    720 }

    /Kristian
    -
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