Hi Putatieve, thanks for you attention here. Let me try to clarify what happens here: the issue is present in kernel 4.4.0-142, 4.15.0-45 and 4.18.0-14. The three versions were already released, but the fix for the regression observed in this LP is present in the new versions that are getting released in this cycle.
For Ubuntu 16.04/Xenial (and Trusty-HWE), the candidate version is: 4.4.0-143. This version is already available through the -proposed pocket, nubu validated that it fixes the issue (thanks nubu!). For Ubuntu 18.04/Bionic (and Xenial-HWE), the candidate version for kernel 4.15 wasn't released yet, so we can't validate yet. This was the reason you couldn't test - your Ubuntu is configured to use 4.15 series, the called HWE kernel. Given the proposed version of 4.15 series for this cycle wasn't released yet, you couldn't test. You *can* install 4.4.0-143 from -proposed if you want, but you'll need to manually set grub to boot that instead of 4.15 (as per md_5 comment). Finally, for Ubuntu 18.10/Cosmic, the fix was released in -updates already, in kernel 4.18.0-15, so the -proposed test isn't even necessary, the fix was released normally by now. Please, let me know if you have questions on Ubuntu kernel cycles in order we can clarify it for you. Cheers, Guilherme -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1813873 Title: Userspace break as a result of missing patch backport Status in linux package in Ubuntu: Fix Committed Status in linux source package in Xenial: Fix Committed Status in linux source package in Bionic: Fix Committed Status in linux source package in Cosmic: Fix Released Bug description: Hi, The most recent set of Ubuntu kernels applied a variety of tty patches including: https://github.com/torvalds/linux/commit/c96cf923a98d1b094df9f0cf97a83e118817e31b But have not applied the more recent https://github.com/torvalds/linux/commit/d3736d82e8169768218ee0ef68718875918091a0 patch. This second patch is required to prevent a rather serious regression where userspace applications reading from stdin can receive EAGAIN when they should not. I will try to link correspondence from the mailing list archives once they are available, but for now if you have access to the linux- console mailing list you can find discussion under the thread "Userspace break? read from STDIN returns EAGAIN if tty is "touched"". I would appreciate it if this could be examined soon as it is a regression on userspace. Thanks Michael Good: 4.15.0-43-generic #46-Ubuntu SMP Thu Dec 6 14:45:28 UTC 2018 Bad: 4.15.0-44-generic #47-Ubuntu SMP Mon Jan 14 11:26:59 UTC 2019 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1813873/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
