[Virtual-pkg-base-maintainers] Bug#822923: base: Lenovo ThinkPad x220 tablet built in camera failes to work as expected.

[Demien M]

Package: base
Severity: important

Dear Maintainer,

*** Reporter, please consider answering these questions, where appropriate ***

   * What led up to the situation?
	I installed a fresh Debian 8 (Jessie) on my Lenovo ThinkPad X220 tablet. All features  worked as expected and to a usable/reasonable extend, INCLUDING the build in video camera (web-camera above the LCD bezel).

To test it i used cheese app and camera initiated as expected, produced video at the correct resolution, LED next to the camera turned on... all was good. 

A week in to using the OS/Laptop camera related issues surfaced. 

Bug#1. If tabled's screen folded in to a tablet mode (twisted and folded to that back of the LCD panel faces the keyboard on Lenovo X220 tablet, camera is no longer detected by OS. 

Returning (twisting) the LCD panel back in to traditional laptop mode does not resolve the issue. Camera still not detected. 

Bug#2. As of right now, at the full OS restart, running Cheese app - camera turns on as expected, produces a video from the camera in the app fro ~40 seconds, and camera shuts off, while LED next to the camera stays on, and the Cheese app displays a message: "No camera detected".
LED stays on for another 5-10 seconds and turns off. 
At that point running "dmesg" shows a lot of errors related to /dev/video1 :


[   11.673646] thinkpad_acpi: This ThinkPad has standard ACPI backlight brightness control, supported by the ACPI video driver
[   58.933027] Linux video capture interface: v2.00
[   58.940526] uvcvideo: Found UVC 1.00 device Integrated Camera (04f2:b217)
[   59.113458] usbcore: registered new interface driver uvcvideo
[   61.752806] uvcvideo: Found UVC 1.00 device Integrated Camera (04f2:b217)
[   75.679877] uvcvideo: Failed to resubmit video URB (-19).
[   77.970672] uvcvideo: Found UVC 1.00 device Integrated Camera (04f2:b217)
[   92.368755] Modules linked in: uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev media bnep nfsd auth_rpcgss oid_registry nfs_acl nfs lockd fscache sunrpc nls_utf8 nls_cp437 vfat fat snd_hda_codec_hdmi ecb arc4 iTCO_wdt iTCO_vendor_support x86_pkg_temp_thermal intel_powerclamp intel_rapl iwldvm coretemp snd_hda_codec_conexant kvm_intel wacom mac80211 kvm snd_hda_codec_generic efi_pstore btusb bluetooth 6lowpan_iphc evdev joydev pcspkr serio_raw efivars i915 iwlwifi snd_hda_intel snd_hda_controller cfg80211 snd_hda_codec lpc_ich thinkpad_acpi i2c_i801 mfd_core wmi snd_hwdep drm_kms_helper snd_pcm drm nvram snd_timer snd i2c_algo_bit rfkill soundcore tpm_tis battery ac i2c_core tpm mei_me video mei shpchp button processor fuse parport_pc ppdev lp parport autofs4 ext4 crc16
[   92.368942]  [<ffffffffa09141b3>] ? uvc_delete+0x13/0x160 [uvcvideo]
[   92.368970]  [<ffffffffa08ef42a>] ? v4l2_release+0x4a/0x80 [videodev]
[   92.381641] Modules linked in: uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev media bnep nfsd auth_rpcgss oid_registry nfs_acl nfs lockd fscache sunrpc nls_utf8 nls_cp437 vfat fat snd_hda_codec_hdmi ecb arc4 iTCO_wdt iTCO_vendor_support x86_pkg_temp_thermal intel_powerclamp intel_rapl iwldvm coretemp snd_hda_codec_conexant kvm_intel wacom mac80211 kvm snd_hda_codec_generic efi_pstore btusb bluetooth 6lowpan_iphc evdev joydev pcspkr serio_raw efivars i915 iwlwifi snd_hda_intel snd_hda_controller cfg80211 snd_hda_codec lpc_ich thinkpad_acpi i2c_i801 mfd_core wmi snd_hwdep drm_kms_helper snd_pcm drm nvram snd_timer snd i2c_algo_bit rfkill soundcore tpm_tis battery ac i2c_core tpm mei_me video mei shpchp button processor fuse parport_pc ppdev lp parport autofs4 ext4 crc16
[   92.381741]  [<ffffffffa09141b3>] ? uvc_delete+0x13/0x160 [uvcvideo]
[   92.381749]  [<ffffffffa08ef42a>] ? v4l2_release+0x4a/0x80 [videodev]
[   92.381783] Modules linked in: uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev media bnep nfsd auth_rpcgss oid_registry nfs_acl nfs lockd fscache sunrpc nls_utf8 nls_cp437 vfat fat snd_hda_codec_hdmi ecb arc4 iTCO_wdt iTCO_vendor_support x86_pkg_temp_thermal intel_powerclamp intel_rapl iwldvm coretemp snd_hda_codec_conexant kvm_intel wacom mac80211 kvm snd_hda_codec_generic efi_pstore btusb bluetooth 6lowpan_iphc evdev joydev pcspkr serio_raw efivars i915 iwlwifi snd_hda_intel snd_hda_controller cfg80211 snd_hda_codec lpc_ich thinkpad_acpi i2c_i801 mfd_core wmi snd_hwdep drm_kms_helper snd_pcm drm nvram snd_timer snd i2c_algo_bit rfkill soundcore tpm_tis battery ac i2c_core tpm mei_me video mei shpchp button processor fuse parport_pc ppdev lp parport autofs4 ext4 crc16
[   92.381833]  [<ffffffffa09141b3>] ? uvc_delete+0x13/0x160 [uvcvideo]
[   92.381838]  [<ffffffffa08ef42a>] ? v4l2_release+0x4a/0x80 [videodev]
[   92.381857] Modules linked in: uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev media bnep nfsd auth_rpcgss oid_registry nfs_acl nfs lockd fscache sunrpc nls_utf8 nls_cp437 vfat fat snd_hda_codec_hdmi ecb arc4 iTCO_wdt iTCO_vendor_support x86_pkg_temp_thermal intel_powerclamp intel_rapl iwldvm coretemp snd_hda_codec_conexant kvm_intel wacom mac80211 kvm snd_hda_codec_generic efi_pstore btusb bluetooth 6lowpan_iphc evdev joydev pcspkr serio_raw efivars i915 iwlwifi snd_hda_intel snd_hda_controller cfg80211 snd_hda_codec lpc_ich thinkpad_acpi i2c_i801 mfd_core wmi snd_hwdep drm_kms_helper snd_pcm drm nvram snd_timer snd i2c_algo_bit rfkill soundcore tpm_tis battery ac i2c_core tpm mei_me video mei shpchp button processor fuse parport_pc ppdev lp parport autofs4 ext4 crc16
[   92.381905]  [<ffffffffa09141b3>] ? uvc_delete+0x13/0x160 [uvcvideo]
[   92.381911]  [<ffffffffa08ef42a>] ? v4l2_release+0x4a/0x80 [videodev]
[   92.381978] Modules linked in: uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev media bnep nfsd auth_rpcgss oid_registry nfs_acl nfs lockd fscache sunrpc nls_utf8 nls_cp437 vfat fat snd_hda_codec_hdmi ecb arc4 iTCO_wdt iTCO_vendor_support x86_pkg_temp_thermal intel_powerclamp intel_rapl iwldvm coretemp snd_hda_codec_conexant kvm_intel wacom mac80211 kvm snd_



   * What exactly did you do (or not do) that was effective (or
     ineffective)?
	Quitting the Cheese app and starting in again did not resolve the issue. 
Logging out of the user account and logging back in did not resolve the issue. 

Full restart of the OS, brings back the camera but only for ~40 seconds when using cheese, and camera turns off again.

   * What was the outcome of this action?
Full restart of the OS, brings back the camera but only for ~40 seconds when using cheese, and camera turns off again.


   * What outcome did you expect instead?
Camera to stay on, take photos and videos. 


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-- System Information:
Debian Release: 8.4
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 3.16.0-4-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.utf8, LC_CTYPE=en_US.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)