ubuntu-users Digest, Vol 48, Issue 362

[Suwandy]

>
> > I'm use Acer 4715z and I've install ubuntu 8.04.1. I want to learn 
> > networking so I install virtualbox 1.6.4. When my laptop doesn't has 
> > activity for a minutes (I don't active the screen saver), the ubuntu 
> > give me the error in CLI like in the below (the message always same 
> > although I restart my laptop):
> > 
> > *[ 1565.836916] BUG: unable to handle kernel NULL pointer dereference at 
> > virtual address 0000005c
> > [ 1565.837008] printing eip: f8ad2e7e *pde = 00000000
> > [ 1565.837122] Oops: 0000 [#1] SMP
> > [ 1565.837232] Modules linked in: bridge tun vboxdrv af_packet ipv6 i915 
> > drm rfcomm l2cap bluetooth ppdev acpi_cpufreq cpufreq_powersave 
> > cpufreq_userspace cpufreq_ondemand cpufreq_conservative cpufreq_stats 
> > freq_table dock container sbs sbshc iptable_filter ip_tables x_tables 
> > parport_pc lp parport joydev snd_hda_intel snd_pcm_oss snd_mixer_oss 
> > snd_pcm wlan_scan_sta snd_page_alloc snd_hwdep usbhid ath_rate_sample 
> > snd_seq_dummy hid acer_acpi psmouse evdev serio_raw pcspkr snd_seq_oss 
> > uvcvideo led_class ath_pci wlan sky2 compat_ioctl32 ath_hal(P) 
> > snd_seq_midi battery videodev v4l1_compat v4l2_common snd_rawmidi 
> > snd_seq_midi_event ac snd_seq snd_timer snd_seq_device snd intel_agp 
> > video output shpchp wmi_acer button agpgart pci_hotplug iTCO_wdt 
> > iTCO_vendor_support soundcore ext3 jbd mbcache sg sd_mod sr_mod cdrom 
> > pata_acpi ata_generic ata_piix libata scsi_mod ehci_hcd uhci_hcd usbcore 
> > thermal processor fan fbcon tileblit font bitblit softcursor fuse
> > [ 1565.840835]
> > [ 1565.840874] Pid: 7719, comm: modprobe Tainted: P        
> > (2.6.24-19-generic #1)
> > [ 1565.840922] EIP: 0060:[<f8ad2e7e>] EFLAGS: 00010246 CPU: 1
> > [ 1565.840984] EIP is at ieee80211_virtfs_vdetach+0x8e/0xf0 [wlan]
> > [ 1565.841030] EAX: 00000000 EBX: 00000000 ECX: f75f0e00 EDX: f75f0b80
> > [ 1565.841076] ESI: f7711480 EDI: f73b0484 EBP: f7711000 ESP: cbc19e64
> > [ 1565.841122]  DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
> > [ 1565.841167] Process modprobe (pid: 7719, ti=cbc18000 task=dff49700 
> > task.ti=cbc18000)
> > [ 1565.841229] Stack: f7711480 f73b0480 f8ab660f f73b0480 f73b0000 
> > 00000000 f7711480 f8c7a845
> > [ 1565.841610]        c021a2a6 f8b91de5 0000000a 00004300 f7398000 
> > f7398000 00000000 f7398000
> > [ 1565.841989]        f73b0000 f73b0480 f7398000 f73b0480 f73b0000 
> > f73b0480 f7398000 f8ab66d6
> > [ 1565.842367] Call Trace:
> > [ 1565.842473]  [<f8ab660f>] ieee80211_vap_detach+0x7f/0x130 [wlan]
> > [ 1565.842585]  [<f8c7a845>] ath_vap_delete+0x125/0x460 [ath_pci]
> > [ 1565.842685]  [<c021a2a6>] __delay+0x6/0x10
> > [ 1565.842777]  [<f8b91de5>] zz016e1251+0x5f/0x15a [ath_hal]
> > [ 1565.842887]  [<f8ab66d6>] ieee80211_ifdetach+0x16/0x60 [wlan]
> > [ 1565.842994]  [<f8c79f29>] ath_detach+0x79/0x160 [ath_pci]
> > [ 1565.843097]  [<f8c81833>] ath_pci_remove+0x23/0x90 [ath_pci]
> > [ 1565.843198]  [<c02274a6>] pci_device_remove+0x16/0x40
> > [ 1565.843290]  [<c02826d4>] __device_release_driver+0x64/0xa0
> > [ 1565.843387]  [<c0282c2b>] driver_detach+0xcb/0xd0
> > [ 1565.843482]  [<c0282223>] bus_remove_driver+0x73/0xa0
> > [ 1565.843576]  [<c022757e>] pci_unregister_driver+0xe/0x70
> > [ 1565.843672]  [<f8c81c82>] exit_ath_pci+0x12/0x2b [ath_pci]
> > [ 1565.843769]  [<c01521a2>] sys_delete_module+0x112/0x190
> > [ 1565.843865]  [<c031e14f>] do_page_fault+0x13f/0x730
> > [ 1565.843958]  [<c01804a0>] do_munmap+0x180/0x1f0
> > [ 1565.844054]  [<c01043c2>] sysenter_past_esp+0x6b/0xa9
> > [ 1565.844153]  =======================
> > [ 1565.844208] Code: de 8b 86 a0 00 00 00 8b 15 fc 8a ae f8 8b 40 08 e8 
> > b8 90 6f c7 83 3d f8 8a ae f8 01 74 44 83 2d f8 8a ae f8 01 8b 86 9c 00 
> > 00 00 <8b> 50 5c 85 d2 74 1a 89 d0 e8 c4 ab 6b c7 8b 86 9c 00 00 00 c7
> > [ 1565.846514] EIP: [<f8ad2e7e>] ieee80211_virtfs_vdetach+0x8e/0xf0 
> > [wlan] SS:ESP 0068:cbc19e64
> > [ 1565.846688] ---[ end trace e7ac0b008e3f587c ]---*
> > 
> > It's so disturb me. I'm really don't understand about the message in the 
> > above, please give me solution and how to I resolve it. many thanks for 
> > the answer. I'm waiting the answer from this forum.
> > 
> > oh yeah, as additional... after the message, I press Ctrl+Alt+F7 and my 
> > laptop has lock, after I unlock it, my wifi can't connect and my 
> > shutdown,restart (press Ctrl+Alt+Del) doesn't work.
>   

> > This is just a guess. Something quick to check.
> In your BIOS setup, what power management settings are set?
> Can you turn off the timeout for no activity?
I've check the problem, if I remove madwifi driver, the ubuntu doesn't 
has problem like in the above and if I install it again, the problem 
occured.
is madwifi driver's has bug?
I'm use madwifi-ng-r2756+ar5007 that I get from the internet.