Tested 3.10.2 from the mainline ppa (in spite of the bad experience with 3.9.8 that is broken).
The linux bluetooth screen of death is still there, 127 days since first notification on the LKML for a fully reproducible regression that completely impairs a subsystem and causes a hard kernel crash with a disastrous memory corruption, sigh. Specifically, the RFCOMM session disconnection fixes that got applied to Linux 3.10 commits (8 off) 24fd642ccb24c8b5732d7d7b5e98277507860b2a to fea7b02fbf73adb2e746f00ed279a782de7e74e4 do not help. All LKML activity on this stopped on 2013-06-25. From it it looks like kernel developers seem to believe that to reproduce the bug a hard power down of the remote is necessary ('Yes. With power down I meant a hard power down, such that the remote doesn't has the chance to close the session cleanly.'). Looks like this is not the case. A simple bluetooth DUN activation / deactivation cycle from network manager (targeting a Galaxy S mobile phone that is never switched off) seems to trigger the bug and the kernel crash here. They may also thik that the bug is fixed with the latest RFCOMM session disconnection fixes or that at least it is reduced in scope (so that only a process is killed and a TTY not released, without the disastrous memory corruption in the kernel). Either here we are discussing a completely different bug from that in the LKML thread http://news.gmane.org/find- root.php?message_id=%3c519480A1.6030909%40ahsoftware.de%3e or the kernel developers miss some relevant information. Can someone from the ubuntu kernel team forward this info to Alexander Holler and others on the LKML list revitalizing the thread? In the meantime, may I again suggest unconfiguring RFCOMM TTY support from ubuntu production kernels as a SRU until this is fixed, so DUN still remains unfunctional, but at least the kernel crashes that may lead to data loss are prevented? The thread on LKML does not exclude data loss '[crash reports] don't make much sense because they happen because of a disastreous memory corruption, which means the BUGs can include almost everything (hopefully nothing which eats your disk contents).' -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1165433 Title: Kernel 3.8.x panics on bluetooth DUN disconnect To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1165433/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs