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I installed v4l-dvb from the media git in hopes of getting my capture card to work (em28xx). I think I installed it wrong? (there were no errors) Because whenever I load anything that checks my camera, like tinychat, cheese, etc, linux sort of "crashes". I don't know if this is a kernel panic or what, but here's the error:
I think I've taken all the relevant part out of dmesg
[ 21.262062] Linux media interface: v0.10
[ 21.271040] Linux video capture interface: v2.00
[ 21.500398] uvcvideo: Found UVC 1.00 device USB 2.0 Camera (064e:d104)
[ 21.504007] input: USB 2.0 Camera as /devices/pci0000:00/0000:00:1a.7/usb1/1-2/1-2:1.0/input/input10
[ 21.504080] usbcore: registered new interface driver uvcvideo
[ 21.504083] USB Video Class driver (1.1.1)
[ 21.517423] BUG: unable to handle kernel NULL pointer dereference at 0000000000000008
[ 21.517482] IP: [<ffffffffa0619fdc>] uvc_v4l2_mmap+0x1c/0x50 [uvcvideo]
[ 21.517526] PGD 13867f067 PUD 13867e067 PMD 0
[ 21.517568] Oops: 0000 [#1] PREEMPT SMP
[ 21.517608] last sysfs file: /sys/devices/pci0000:00/0000:00:1a.7/usb1/1-2/1-2:1.0/media0/uevent
[ 21.517660] CPU 0
[ 21.517676] Modules linked in: uvcvideo videodev media v4l2_compat_ioctl32 uhci_hcd joydev snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_pcm arc4 ecb snd_timer ehci_hcd sg serio_raw snd iTCO_wdt iTCO_vendor_support i2c_i801 psmouse r8169 usbcore pcspkr soundcore snd_page_alloc mii thermal ac fan battery evdev sparse_keymap processor vboxdrv iwlagn mac80211 cfg80211 rfkill ext4 mbcache jbd2 crc16 sr_mod cdrom sd_mod ahci libahci libata scsi_mod i915 drm_kms_helper drm intel_agp i2c_algo_bit button intel_gtt i2c_core video
[ 21.518210]
[ 21.518223] Pid: 638, comm: v4l_id Not tainted 2.6.39-ARCH #1 TOSHIBA Satellite L505/Portable PC
[ 21.518281] RIP: 0010:[<ffffffffa0619fdc>] [<ffffffffa0619fdc>] uvc_v4l2_mmap+0x1c/0x50 [uvcvideo]
[ 21.518331] RSP: 0018:ffff880138163bc8 EFLAGS: 00010246
[ 21.518362] RAX: 0000000000000000 RBX: ffff8801386ff400 RCX: 0000000000000504
[ 21.518397] RDX: ffffffffa058a168 RSI: 0000000000000000 RDI: ffff880138165f00
[ 21.518432] RBP: ffff880138163be8 R08: 2222222222222222 R09: 2222222222222222
[ 21.518466] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801386ff488
[ 21.518501] R13: ffff880138165f00 R14: ffff8801386ff400 R15: 00000000ffffffed
[ 21.518536] FS: 00007f43bc9a7700(0000) GS:ffff88013fc00000(0000) knlGS:0000000000000000
[ 21.518581] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 21.520000] CR2: 0000000000000008 CR3: 0000000138710000 CR4: 00000000000406f0
[ 21.520005] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 21.520005] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[ 21.520005] Process v4l_id (pid: 638, threadinfo ffff880138162000, task ffff8801225baa60)
[ 21.520005] Stack:
[ 21.520005] ffff8801386ff488 ffff880138165f00 0000000000000001 ffff8801386ff400
[ 21.520005] ffff880138163c28 ffffffffa05797ed ffff880139c99b20 ffff880137009a00
[ 21.520005] ffff880136bf7920 ffff880138165f00 0000000000000001 ffffffffa058a3a0
[ 21.520005] Call Trace:
[ 21.520005] [<ffffffffa05797ed>] v4l2_open+0x16d/0x190 [videodev]
[ 21.520005] [<ffffffff811560eb>] chrdev_open+0x1bb/0x2d0
[ 21.520005] [<ffffffff8114fcfb>] __dentry_open+0x16b/0x390
[ 21.520005] [<ffffffff81155f30>] ? cdev_put+0x30/0x30
[ 21.520005] [<ffffffff811511d1>] nameidata_to_filp+0x71/0x80
[ 21.520005] [<ffffffff8116004c>] do_last+0x3cc/0xa80
[ 21.520005] [<ffffffff8116150b>] path_openat+0xcb/0x3c0
[ 21.520005] [<ffffffff81119ef6>] ? handle_mm_fault+0x1a6/0x360
[ 21.520005] [<ffffffff81161842>] do_filp_open+0x42/0xa0
[ 21.520005] [<ffffffff8116e04c>] ? alloc_fd+0xec/0x140
[ 21.520005] [<ffffffff811512d7>] do_sys_open+0xf7/0x1d0
[ 21.520005] [<ffffffff811513d0>] sys_open+0x20/0x30
[ 21.520005] [<ffffffff813e8f42>] system_call_fastpath+0x16/0x1b
[ 21.520005] Code: 4f dc e0 e9 00 ff ff ff 0f 1f 80 00 00 00 00 55 48 89 e5 53 48 83 ec 18 0f 1f 44 00 00 f6 05 0b ac 00 00 20 48 8b 87 a0 00 00 00
[ 21.520005] 8b 58 08 75 13 48 8d bb d8 00 00 00 e8 02 f9 ff ff 48 83 c4
[ 21.520005] RIP [<ffffffffa0619fdc>] uvc_v4l2_mmap+0x1c/0x50 [uvcvideo]
[ 21.520005] RSP <ffff880138163bc8>
[ 21.520005] CR2: 0000000000000008
[ 21.561047] ---[ end trace 9f5f11b2e2566ad6 ]---This also shows up on start up. In gnome I used to be able to just press the windows key and close the error screen (white text on black), but I can't do so on dwm. I've tried reinstalling my kernel (pacman -S kernel26), but it doesn't do anything. Is there a way I can fix this without re installing? Thanks.
Last edited by Draucia (2011-07-07 14:32:36)
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Could someone help me please? I get this whenever I visit an application that tries to use my camera. I have to hard restart my computer.
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Well... re-installed arch.
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