[Bug 1546985] Re: BUG: unable to handle kernel paging request at ffff87ffb88dbf18

2016-04-17 Thread Po-Hsu Lin
I will close this bug as the hardware is not in a stable state, sometime the display will flicker from the very beginning (even on the BIOS screen), which make it hard to determine it's a HW/SW issue. Thanks. ** Changed in: linux (Ubuntu) Status: Incomplete => Invalid ** Changed in:

[Bug 1546985] Re: BUG: unable to handle kernel paging request at ffff87ffb88dbf18

2016-02-23 Thread Po-Hsu Lin
This crash and auto reboot issue can be reproduced on 3.2.0-51 and 3.2.0-40 with Firefox (44.0.2) as well. Which is very strange, as we already have this system in our test pool for a long time. Note that it's not guaranteed to crash with the html5 video in Firefox every time, but it will

[Bug 1546985] Re: BUG: unable to handle kernel paging request at ffff87ffb88dbf18

2016-02-22 Thread Christopher M. Penalver
Po-Hsu Lin, in order to allow additional upstream developers to examine the issue, at your earliest convenience, could you please test the latest upstream kernel available from http://kernel.ubuntu.com/~kernel-ppa/mainline/?C=N;O=D ? Please keep in mind the following: 1) The one to test is at

[Bug 1546985] Re: BUG: unable to handle kernel paging request at ffff87ffb88dbf18

2016-02-22 Thread Po-Hsu Lin
I found it could be reproduced by just open the html5 video test page with Firefox, and compare two test results between this and the last cycle (3.2.0-98), the Firefox package is different: 44.0.2+build1-0ubuntu0.12.04.1 vs. 43.0.4+build3-0ubuntu0.12.04.1 And it will crash with Chromium as well.

[Bug 1546985] Re: BUG: unable to handle kernel paging request at ffff87ffb88dbf18

2016-02-22 Thread Po-Hsu Lin
Hi, This crash-and-auto-restart issue can be reproduced on 3.2.0-98, 3.2.0-97 and 3.2.0-96 I am trying to test it with an older kernel. Also, this issue only happen to this specific system, other SRU systems are not affected And one note worthy thing is that the VGA video output on this system

[Bug 1546985] Re: BUG: unable to handle kernel paging request at ffff87ffb88dbf18

2016-02-20 Thread Christopher M. Penalver
** 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/1546985 Title: BUG: unable to handle kernel paging request at 87ffb88dbf18

[Bug 1546985] Re: BUG: unable to handle kernel paging request at ffff87ffb88dbf18

2016-02-19 Thread Luis Henriques
After looking at the several logs, they seem to be a bit inconsistent and make it difficult to point to a commit in this specific release. Also, I've failed to reproduce the issue locally. Would it be possible for you to test the previous kernel (3.2.0-98.138) and double check that the issue does

[Bug 1546985] Re: BUG: unable to handle kernel paging request at ffff87ffb88dbf18

2016-02-19 Thread Joseph Salisbury
** Changed in: linux (Ubuntu) Importance: Undecided => Medium ** Changed in: linux (Ubuntu Precise) Importance: Undecided => Medium ** Changed in: linux (Ubuntu Precise) Status: New => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which

[Bug 1546985] Re: BUG: unable to handle kernel paging request at ffff87ffb88dbf18

2016-02-19 Thread Po-Hsu Lin
When this "NULL pointer deference" issue happens, the system still can be reached via SSH. Please see the log file for dmesg output ** Attachment added: "kernel.log" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1546985/+attachment/4575478/+files/kernel.log -- You received this bug

[Bug 1546985] Re: BUG: unable to handle kernel paging request at ffff87ffb88dbf18

2016-02-19 Thread Po-Hsu Lin
Also, with restless reboot and retest, I luckily capture the "NULL pointer deference" issue on 3.2.0-99 ** Attachment added: "null-pointer-deference-2016-Feb-19.jpg" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1546985/+attachment/4575459/+files/IMG_20160219_182450.jpg -- You

[Bug 1546985] Re: BUG: unable to handle kernel paging request at ffff87ffb88dbf18

2016-02-19 Thread Po-Hsu Lin
** Attachment added: "paging-request-kern.log" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1546985/+attachment/4575368/+files/kern.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu.

[Bug 1546985] Re: BUG: unable to handle kernel paging request at ffff87ffb88dbf18

2016-02-19 Thread Po-Hsu Lin
Verified again with this system re-installed, this issue still 100% reproducible on 3.2.0-99. Steps: 1. Re-install the system with --proposed. 2. Run the gpu_lockup_after_suspend on it. Result: * For the very beginning, when it crashes on the gpu_lockup_after_suspend job, it will reboot itself

[Bug 1546985] Re: BUG: unable to handle kernel paging request at ffff87ffb88dbf18

2016-02-18 Thread Luis Henriques
The bug present in the kern.log seems to belong to an ancient kernel (3.2.0-29.46), so I will ignore that for now (as it was probably fixed in earlier kernels. The NULL pointer in the photo doesn't seem to contain a lot of info, but I'll have look. ** Also affects: linux (Ubuntu Precise)

[Bug 1546985] Re: BUG: unable to handle kernel paging request at ffff87ffb88dbf18

2016-02-18 Thread Po-Hsu Lin
** Attachment added: "IMG_20160218_171801.jpg" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1546985/+attachment/4574354/+files/IMG_20160218_171801.jpg -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu.

[Bug 1546985] Re: BUG: unable to handle kernel paging request at ffff87ffb88dbf18

2016-02-18 Thread Po-Hsu Lin
** Attachment added: "kern.log" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1546985/+attachment/4574358/+files/kern.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1546985 Title: