[Bug 1520751] Re: Kernel 4.2 does not detect external monitor
Okay, I tested the daily build of xenial (ubuntu version) this morning. It is using kernel 4.3.0-2, and I can confirm that this detects the monitor without problem. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1520751 Title: Kernel 4.2 does not detect external monitor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1520751/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1520751] Re: Kernel 4.2 does not detect external monitor
David Abergel, thank you for taking the time to report this bug and helping to make Ubuntu better. However, I am closing it because the bug has been fixed in the latest development version of Ubuntu. This is a significant bug in Ubuntu. If you need a fix for the bug in previous versions of Ubuntu, please perform as much as possible of the SRU Procedure [1] to bring the need to a developer's attention. [1]: https://wiki.ubuntu.com/StableReleaseUpdates#Procedure ** Changed in: linux (Ubuntu) Status: Incomplete => Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1520751 Title: Kernel 4.2 does not detect external monitor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1520751/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1520751] Re: Kernel 4.2 does not detect external monitor
David Abergel, it would be helpful to confirm if the commit is already in Ubuntu by testing the live environment via http://cdimage.ubuntu.com /daily-live/current/ . Could you please advise? ** Changed in: linux (Ubuntu) Status: Triaged => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1520751 Title: Kernel 4.2 does not detect external monitor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1520751/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1520751] Re: Kernel 4.2 does not detect external monitor
You mean upgrade to the whole distribution or just the kernel? This issue is happening on my main work laptop so I need reasonable stability so I'm not sure I want to use a pre-alpha distro. I think for now I am fine using the mainline 4.3 kernel which works fine, or the 4.2.0-rc8 one which I compiled corresponding to the first good commit. (The 4.3 one is also giving me a few bugs which I think are unrelated). So I think I can wait for the backport. Thanks again for your help. David -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1520751 Title: Kernel 4.2 does not detect external monitor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1520751/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1520751] Re: Kernel 4.2 does not detect external monitor
David Abergel, if the updates have landed in Xenial already, you may want to consider upgrading to it, versus waiting for a backport to Vivid. ** Tags added: cherry-pick kernel-fixed-upstream kernel-fixed- upstream-4.3 reverse-bisect-done ** Changed in: linux (Ubuntu) Importance: Medium => High ** Changed in: linux (Ubuntu) Status: Incomplete => Triaged -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1520751 Title: Kernel 4.2 does not detect external monitor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1520751/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1520751] Re: Kernel 4.2 does not detect external monitor
Christopher, I have finished the bisection (man, that took a long time!) and I have attached the output. The summary is that commit 4efa83c8c786ab7ec7982e3dd348cb7e7ecbeb04 is the one that fixes things. This makes sense because I am attaching my external monitor via a DP->VGA dongle, mentioned in the description. So, what next? Thanks again for your assistance. David ** Attachment added: "Output from git bisect for the first bad commit." https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1520751/+attachment/4535138/+files/badcommit.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1520751 Title: Kernel 4.2 does not detect external monitor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1520751/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1520751] Re: Kernel 4.2 does not detect external monitor
David Abergel, the next step is to fully reverse commit bisect from kernel 4.2 to 4.3 in order to identify the last bad commit, followed immediately by the first good one. Once this commit has been identified, then it may be reviewed as a candidate for backporting into your release. Could you please do this following https://wiki.ubuntu.com/Kernel/KernelBisection#How_do_I_reverse_bisect_the_upstream_kernel.3F ? Please note, finding adjacent kernel versions is not fully commit bisecting. Thank you for your understanding. Helpful bug reporting tips: https://wiki.ubuntu.com/ReportingBugs ** Changed in: linux (Ubuntu) Importance: Low => Medium ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1520751 Title: Kernel 4.2 does not detect external monitor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1520751/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1520751] Re: Kernel 4.2 does not detect external monitor
** Tags removed: bios-outdated-a07 ** Tags added: latest-bios-a07 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1520751 Title: Kernel 4.2 does not detect external monitor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1520751/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1520751] Re: Kernel 4.2 does not detect external monitor
Dear Christopher, I updated the BIOS today. Ouput from the command you requested is: $ sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date [password] A07 11/11/2015 The problem persists, so I have marked this as Confirmed, per your request. As I stated in the initial post, the problem is that when I connect an external monitor, it is not detected using the standard 4.2.x.xx kernel. When I use the mainline 4.3 kernel, the external monitor is detected and operates as expected. If you need any other specific information, please don't hesitate to ask. ** Changed in: linux (Ubuntu) Status: Incomplete => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1520751 Title: Kernel 4.2 does not detect external monitor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1520751/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1520751] Re: Kernel 4.2 does not detect external monitor
Dear Christopher, Thank you for the suggestion. Unfortunately, I won't be able to do this for at least a week because Real Life™ is too busy. (Also, I've not updated a BIOS before so I am cautious about the idea.) But if I can do it some time in the next week or two I shall update the bug. Cheers. David -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1520751 Title: Kernel 4.2 does not detect external monitor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1520751/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1520751] Re: Kernel 4.2 does not detect external monitor
David Abergel, thank you for reporting this and helping make Ubuntu better. As per http://www.dell.com/support/home/us/en/19/product- support/product/xps-13-9343-laptop/drivers/advanced an update to your computer's buggy and outdated BIOS is available (A07). If you update to this following https://help.ubuntu.com/community/BIOSUpdate does it address the issue? If it doesn't, could you please both specify what happened, and provide the output of the following terminal command: sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date For more on BIOS updates and linux, please see https://help.ubuntu.com/community/ReportingBugs#Bug_reporting_etiquette . Please note your current BIOS is already in the Bug Description, so posting this on the old BIOS would not be helpful. Also, you don't have to create a new bug report. Once the BIOS is updated, if the problem is still reproducible, and the information above is provided, then please mark this report Status Confirmed. Otherwise, please mark this as Invalid. Thank you for your understanding. ** Tags added: bios-outdated-a07 ** Changed in: linux (Ubuntu) Importance: Undecided => Low ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1520751 Title: Kernel 4.2 does not detect external monitor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1520751/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
