[Bug 1705900] Re: Lenovo e73 USB webcam problems
I reported the bug with the Microsoft one, but the same problem also occurs with Trust WB-5400 webcam. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1705900 Title: Lenovo e73 USB webcam problems To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1705900/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1705900] Re: Lenovo e73 USB webcam problems
I tried to update to linux-
image-4.13.0-041300rc2-generic_4.13.0-041300rc2.201707232231_i386.deb,
but I was told it was no longer possible to log in (the login screen
appeared, but it was not possible to write password as if the keyboard
was not connected at all). After reverting to the previous kernel it was
possible to log in again.
However, I still have some findings that may be useful. I tried to add
some debug printk's around the code that caused the null pointer
dereference and I was able to find the exact place where the null
pointer dereference occurs. I used Ubuntu-hwe-4.8.0-58.63_16.04.1 for
that.
The problem is in usb_ifnum_to_if where config->interface[i] is null
(http://kernel.ubuntu.com/git/ubuntu/ubuntu-
xenial.git/tree/drivers/usb/core/usb.c?h=Ubuntu-
hwe-4.8.0-58.63_16.04.1=2e1f960b96b3d80fc2b91809bf0cb02c97abe8f4#n144)
Here's a short snippet of the code:
for (i = 0; i < config->desc.bNumInterfaces; i++) {
if (config->interface[i]->altsetting[0] /* config->interface[i] == 0 here! */
.desc.bInterfaceNumber == ifnum) {
return config->interface[i];
}
}
And it's not a single interface that fails, it seems that all interfaces
are null, since the changed code that I used for debugging actually
looks like this:
for (i = 0; i < config->desc.bNumInterfaces; i++) {
if (config->interface[i] == 0) {
printk(KERN_ALERT "DEBUG: Interface %d is null\n", i);
continue;
}
if (config->interface[i]->altsetting[0]
.desc.bInterfaceNumber == ifnum) {
return config->interface[i];
}
}
And in dmesg I found:
júl 23 13:40:11 lenovo kernel: DEBUG: Interface 0 is null
júl 23 13:40:12 lenovo kernel: DEBUG: Interface 1 is null
júl 23 13:40:12 lenovo kernel: DEBUG: Interface 2 is null
júl 23 13:40:12 lenovo kernel: DEBUG: Interface 3 is null
júl 23 13:40:12 lenovo kernel: DEBUG: Interface 0 is null
júl 23 13:40:13 lenovo kernel: DEBUG: Interface 1 is null
júl 23 13:40:13 lenovo kernel: DEBUG: Interface 2 is null
júl 23 13:40:13 lenovo kernel: DEBUG: Interface 3 is null
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https://bugs.launchpad.net/bugs/1705900
Title:
Lenovo e73 USB webcam problems
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[Bug 1705900] CurrentDmesg.txt
apport information ** Attachment added: "CurrentDmesg.txt" https://bugs.launchpad.net/bugs/1705900/+attachment/4923945/+files/CurrentDmesg.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1705900 Title: Lenovo e73 USB webcam problems To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1705900/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1705900] Lspci.txt
apport information ** Attachment added: "Lspci.txt" https://bugs.launchpad.net/bugs/1705900/+attachment/4923947/+files/Lspci.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1705900 Title: Lenovo e73 USB webcam problems To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1705900/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1705900] CRDA.txt
apport information ** Attachment added: "CRDA.txt" https://bugs.launchpad.net/bugs/1705900/+attachment/4923944/+files/CRDA.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1705900 Title: Lenovo e73 USB webcam problems To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1705900/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1705900] JournalErrors.txt
apport information ** Attachment added: "JournalErrors.txt" https://bugs.launchpad.net/bugs/1705900/+attachment/4923946/+files/JournalErrors.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1705900 Title: Lenovo e73 USB webcam problems To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1705900/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1705900] Lsusb.txt
apport information ** Attachment added: "Lsusb.txt" https://bugs.launchpad.net/bugs/1705900/+attachment/4923948/+files/Lsusb.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1705900 Title: Lenovo e73 USB webcam problems To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1705900/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1705900] ProcCpuinfo.txt
apport information ** Attachment added: "ProcCpuinfo.txt" https://bugs.launchpad.net/bugs/1705900/+attachment/4923949/+files/ProcCpuinfo.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1705900 Title: Lenovo e73 USB webcam problems To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1705900/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1705900] Re: Lenovo e73 USB webcam problems
apport information ** Tags added: apport-collected xenial ** Description changed: I'm experiencing problems with USB webcam on Lenovo e73 with Ubuntu 16.04.2 Xenial 32bit. Originally with 4.4 connecting the camera often resulted in complete hang of the system (apparently not even SysRq worked, though I did not test that personally since it is a system I'm administering remotely for a family member). There was always a null pointer dereference just before the hang, so I suspect that is the culprit (see the attached kernel log). - After some updates the system no longer hangs. I suspect this was fixed - by going from linux 4.4 to 4.8. However, the webcam still often doesn't - work and most application just return error. This is usually fixed after - several tries, but sometimes it is necessary to reboot computer. - Updating BIOS didn't help. The kernel logs still contain the same null - pointer dereference with exactly the same stack trace for both 4.8 and - 4.10. + After some updates the system no longer hangs. I suspect this was fixed by going from linux 4.4 to 4.8. However, the webcam still often doesn't work and most application just return error. This is usually fixed after several tries, but sometimes it is necessary to reboot computer. Updating BIOS didn't help. The kernel logs still contain the same null pointer dereference with exactly the same stack trace for both 4.8 and 4.10. + --- + ApportVersion: 2.20.1-0ubuntu2.10 + Architecture: i386 + AudioDevicesInUse: + USERPID ACCESS COMMAND + /dev/snd/controlC2: user 1852 F pulseaudio + /dev/snd/controlC0: user 1852 F pulseaudio + /dev/snd/controlC1: user 1852 F pulseaudio + DistroRelease: Ubuntu 16.04 + HibernationDevice: RESUME=UUID=de34a223-a620-435a-974a-e29dad30f1ac + InstallationDate: Installed on 2017-05-05 (85 days ago) + InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release i386 (20151021) + IwConfig: + tun0 no wireless extensions. + + enp2s0no wireless extensions. + + lono wireless extensions. + MachineType: LENOVO 10DR002SMC + Package: linux (not installed) + ProcEnviron: + TERM=xterm-256color + PATH=(custom, no user) + LANG=sk_SK.UTF-8 + SHELL=/bin/bash + ProcFB: 0 inteldrmfb + ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.8.0-58-generic root=UUID=07f94680-ac2c-498b-86e4-72ff6e4bd18f ro quiet splash usbcore.autosuspend=-1 vt.handoff=7 + ProcVersionSignature: Ubuntu 4.8.0-58.63~16.04.1-generic 4.8.17 + PulseList: + Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not accessible: Permission denied + No PulseAudio daemon running, or not running as session daemon. + RelatedPackageVersions: + linux-restricted-modules-4.8.0-58-generic N/A + linux-backports-modules-4.8.0-58-generic N/A + linux-firmware1.157.11 + RfKill: + + Tags: xenial + Uname: Linux 4.8.0-58-generic i686 + UpgradeStatus: Upgraded to xenial on 2017-05-05 (85 days ago) + UserGroups: + + _MarkForUpload: True + dmi.bios.date: 02/13/2017 + dmi.bios.vendor: LENOVO + dmi.bios.version: FCKT82AUS + dmi.board.name: 3098 + dmi.board.vendor: LENOVO + dmi.board.version: SDK0G00599 WIN + dmi.chassis.type: 3 + dmi.chassis.vendor: LENOVO + dmi.modalias: dmi:bvnLENOVO:bvrFCKT82AUS:bd02/13/2017:svnLENOVO:pn10DR002SMC:pvrThinkCentreE73:rvnLENOVO:rn3098:rvrSDK0G00599WIN:cvnLENOVO:ct3:cvr: + dmi.product.name: 10DR002SMC + dmi.product.version: ThinkCentre E73 + dmi.sys.vendor: LENOVO ** Attachment added: "AlsaInfo.txt" https://bugs.launchpad.net/bugs/1705900/+attachment/4923943/+files/AlsaInfo.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1705900 Title: Lenovo e73 USB webcam problems To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1705900/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1705900] Re: Lenovo e73 USB webcam problems
Will do as soon as I have access to the computer in question. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1705900 Title: Lenovo e73 USB webcam problems To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1705900/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1705900] Re: Lenovo e73 USB webcam problems
** Attachment added: "report generated by ubuntu-bug" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1705900/+attachment/4919675/+files/ubuntu-bug_report -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1705900 Title: Lenovo e73 USB webcam problems To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1705900/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1705900] [NEW] Lenovo e73 USB webcam problems
Public bug reported: I'm experiencing problems with USB webcam on Lenovo e73 with Ubuntu 16.04.2 Xenial 32bit. Originally with 4.4 connecting the camera often resulted in complete hang of the system (apparently not even SysRq worked, though I did not test that personally since it is a system I'm administering remotely for a family member). There was always a null pointer dereference just before the hang, so I suspect that is the culprit (see the attached kernel log). After some updates the system no longer hangs. I suspect this was fixed by going from linux 4.4 to 4.8. However, the webcam still often doesn't work and most application just return error. This is usually fixed after several tries, but sometimes it is necessary to reboot computer. Updating BIOS didn't help. The kernel logs still contain the same null pointer dereference with exactly the same stack trace for both 4.8 and 4.10. ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Attachment added: "kernel log" https://bugs.launchpad.net/bugs/1705900/+attachment/4919674/+files/kernel_log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1705900 Title: Lenovo e73 USB webcam problems To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1705900/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 397466]
Oh come on guys, bugzilla is not a forum. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/397466 Title: There is no KWallet PAM integration To manage notifications about this bug go to: https://bugs.launchpad.net/kde-baseapps/+bug/397466/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
