| mlankhorst | feeling a bit sick, but good morning :) | 08:36 |
|---|---|---|
| mlankhorst | can someone re-upload libdrm? I fixed the arm build failure | 08:56 |
| seb128 | mlankhorst, there? | 15:03 |
| mlankhorst | yeah | 15:25 |
| seb128 | mlankhorst, hey | 15:25 |
| mlankhorst | heya | 15:26 |
| seb128 | mlankhorst, https://bugs.launchpad.net/ubuntu/precise/+source/xorg-server/+bug/1021517 seems a regression in the recent precise SRU | 15:26 |
| ubottu | Launchpad bug 1021517 in xorg-server (Ubuntu Precise) "Xorg-server crashes reproducible with GIMP usage" [High,Confirmed] | 15:26 |
| seb128 | which got pushed to -security as well | 15:26 |
| mlankhorst | oh fun | 15:26 |
| seb128 | mlankhorst, can you or somebody else from here have a look soon? | 15:26 |
| seb128 | mlankhorst, comments mention it depends of the trackpad status (like they get it when doing fn-f8) | 15:26 |
| seb128 | see the most recent comments | 15:27 |
| mlankhorst | yeah seems likely that it was from 10.3 update, bit weird it would only show now though | 15:29 |
| seb128 | mlankhorst, it doesn't only show now | 15:29 |
| seb128 | mlankhorst, we started the bug was filed on 2012-07-06 | 15:29 |
| seb128 | ups | 15:29 |
| seb128 | -we started | 15:29 |
| seb128 | mlankhorst, I guess you guys didn't monitor the new bugs after the SRU? | 15:30 |
| jcristau | no apport gdb trace or anything? | 15:30 |
| mlankhorst | seb128: I guess those people didn't test -proposed, more likely | 15:31 |
| seb128 | jcristau, only https://launchpadlibrarian.net/109601036/XorgLogOld.txt :-( | 15:32 |
| jcristau | yeah not quite as useful | 15:32 |
| mlankhorst | I'll see if I can make a new shiny backtrace | 15:32 |
| seb128 | not sure why we don't get apport report for xorg, I guess the xserver handler block it | 15:33 |
| jcristau | maybe with those binaries addr2line would work, but i'm not going to download that.. | 15:33 |
| mlankhorst | I'll create a new bt if I can reproduce | 15:33 |
| mlankhorst | works here :\ bug is useless without backtrace | 15:46 |
| mlankhorst | oh there we go | 15:48 |
| seb128 | mlankhorst, you got it? | 15:53 |
| mlankhorst | seb128: hm nope, was a sigpipe which is valid | 15:53 |
| mlankhorst | might be old xf86-input-synaptics | 15:54 |
| seb128 | mlankhorst, the bug got some pretty responsive users, you can perhaps give them hint to get the stacktrace? | 15:56 |
| jcristau | the bug already has a pointer to https://wiki.ubuntu.com/X/Backtracing | 15:57 |
| seb128 | ok | 15:58 |
| seb128 | mlankhorst, jcristau: I get the bug here, let me try that | 15:58 |
| mlankhorst | seb128: oh i just put some qs on the bug | 15:59 |
| seb128 | easy to get for me "gsettings set org.gnome.settings-daemon.peripherals.touchpad touchpad-enabled false" | 15:59 |
| seb128 | well I just gor an xorg segfault this way in a guest session | 15:59 |
| mlankhorst | ok | 16:01 |
| mlankhorst | riught that works | 16:01 |
| seb128_ | hum, something the kernel didn't like | 16:05 |
| mlankhorst | seb128_: seems i can reproduce it, but I'm going to lay down now, not feeling so well | 16:05 |
| seb128_ | mlankhorst, ok | 16:05 |
| seb128 | hum, again | 16:09 |
| seb128 | mlankhorst, sorry I might have missed what you said, but get better! | 16:09 |
| mlankhorst | seb128: its no problem to get the bt tomorrow, already had one | 16:10 |
| seb128 | mlankhorst, should we hand over that to bryceh or RAOF while you get better? | 16:11 |
| mlankhorst | it's just something that got my throat quite good, should be over in a day I hope :) | 16:15 |
| seb128 | mlankhorst, jcristau: backtrace on https://bugs.launchpad.net/gimp/+bug/1021517/comments/58 | 16:16 |
| ubottu | Launchpad bug 1021517 in xorg-server (Ubuntu Precise) "Xorg-server crashes reproducible with GIMP usage" [High,Confirmed] | 16:16 |
| seb128 | bryceh, ^ when you are up, it's a segfault and seems a regression from the recent SRU,security update to precise | 16:18 |
| mlankhorst | it was before the security update so definitely the dix changes in 10.4, maybe cnd would know from the backtrace | 16:21 |
| mlankhorst | if not with a bit more work anyone could find out what's going wrong :) | 16:21 |
| seb128 | mlankhorst, right, it's likely 10.3 | 16:23 |
| seb128 | cnd, ^ | 16:23 |
| cnd | I'll take a quick look | 16:26 |
| seb128 | cnd, thanks | 16:27 |
| seb128 | cnd, you can do that today? it's an xorg segfault regression easy to trigger which made it in a security update of the current lts, i.e not great to have, we should address it | 16:35 |
| bryceh | heya | 16:35 |
| seb128 | bryceh, hey | 16:35 |
| seb128 | bryceh, how are you? happy monday :p | 16:35 |
| bryceh | seb128, a bit invalid... threw out my back yesterday while wrestling my son into a pair of pants | 16:37 |
| seb128 | bryceh, :-( | 16:37 |
| cnd | mlankhorst, seb128: interesting, it's obviously input related, but I have no idea | 16:38 |
| cnd | mlankhorst, it was in the latest update? | 16:38 |
| cnd | mlankhorst, when you said changes in 10.4, did you mean 11.4? | 16:38 |
| cnd | oh wait, nm | 16:38 |
| cnd | -0ubuntu10.4 | 16:38 |
| cnd | mlankhorst, the attached X log says -0ubuntu10.3 | 16:38 |
| cnd | I may be restating things we already know :0 | 16:38 |
| cnd | mlankhorst, seb128: so my initial thoughts are that I haven't heard of such a bug before based on upstream activity | 16:38 |
| cnd | and we need to do some deep dive debugging to figure it out, unless we can find a specific commit or patch that affects things | 16:38 |
| cnd | if you can figure out *what* is going wrong, I can help figure out how to fix it | 16:38 |
| seb128 | cnd, it's trivial to trigger for me, run gimp, create an image, turn touchpad off (that's my latitude e6410 laptop config) | 16:39 |
| seb128 | cnd, I'm happy to test versions but report timing makes it pretty likely the issue is in ubuntu10.3 | 16:40 |
| seb128 | cnd, I turn off the pad with gsd by doing the gsettings command I put it comment #58 | 16:40 |
| seb128 | cnd, let me know if I can be useful in debugging | 16:41 |
| bryceh | seb128, have you tested 10.2 to verify that the bug isn't reproducible there? | 16:41 |
| bryceh | actually, come to think of it I was just yesterday using gimp on a machine that has 10.2 loaded and it did not crash | 16:43 |
| seb128 | bryceh, yes, downgrading to xserver-xorg-core (2:1.11.4-0ubuntu10.2) fixes it | 16:43 |
| seb128 | ok, upgrading to 0ubuntu10.3 and the bug is back | 16:46 |
| seb128 | it segfault on first click in gimp after turning the touchpad off | 16:46 |
| seb128 | so | 16:46 |
| seb128 | bryceh, cnd, mlankhorst: we need an upload to fix that today or tomorrow, do you think debugging the issue and fixing is a reasonable way out or should we look at reverting the ubuntu10.3 changes? | 16:46 |
| seb128 | or do you want to look at fixing it for a bit and after $time go to fallback plan to revert? | 16:47 |
| cnd | seb128, I'm sort of sprinting with the kernel team | 16:51 |
| cnd | I didn't bring a second laptop | 16:51 |
| cnd | so I can't today | 16:51 |
| cnd | and I'm also not really *supposed* to be helping debug X stuff, since I have other day job stuff | 16:51 |
| cnd | I know that mlankhorst is quite capable of that :) | 16:51 |
| cnd | if he can't get to it for some reason, then I can try to step in | 16:51 |
| cnd | seb128, I could probably reproduce it, but I can't debug it easily without a second machine at least | 16:51 |
| cnd | that's the blocker for me for today | 16:51 |
| cnd | but again, I need to focus on other work, and try to be a resource for determining a proper fix after the root cause has been identified | 16:51 |
| cnd | seb128, it's that critical of an issue? | 16:51 |
| cnd | seb128, we'd have to figure out what needs reverting first | 16:51 |
| cnd | the specific patch or commit would help | 16:51 |
| seb128 | cnd, mlankhorst is unwell and went to bed | 16:52 |
| seb128 | cnd, well, it's "xorg segfault when using gimp" which got introduced in a SRU,security update in the LTS, so it's an high importance issue yes | 16:52 |
| seb128 | cnd, xorg closing might mean work and datas lost | 16:53 |
| seb128 | cnd, but if you are busy no worry, I'm trying to estimate our easier way out | 16:53 |
| bryceh | seb128, the 10.3 change set introduces six patches which fix one bug, which is also a crasher. Reverting seems feasible and maybe lowest risk solution. | 16:53 |
| mdeslaur | but wasn't 10.3 to fix a regression introduced in 10.2? :) | 16:54 |
| seb128 | pick your least bad regression :p | 16:54 |
| bryceh | mdeslaur, hrmm, well the 10.2 fix was to make touchpad work on macbookair | 16:56 |
| mdeslaur | which was incomplete and causing xephyr to segfault | 16:57 |
| seb128 | well, xephyr to segfault is better than xorg to segfault | 16:57 |
| mdeslaur | so, it's pick the least evil of regressions :) | 16:57 |
| bryceh | mdeslaur, right what I mean is that if we rolled that back too, then we would get into a state where nothing is crashing, just that macbooks have broken touchpads | 16:59 |
| mdeslaur | hrm, I agree, not ideal | 16:59 |
| cnd | bryceh, seb128: the bug fixed by 10.3 is a much lesser evil than an X server crash | 17:00 |
| bryceh | seb128, cnd if you'd like, I can take the action to revert the 10.3 and 10.2 changes | 17:02 |
| seb128 | ok, at this point it's easier "we believe the easier way out is to fix the bug and we give it a few hours" | 17:02 |
| seb128 | easier->either | 17:02 |
| seb128 | or "let's revert and give us time then to figure what is wrong" | 17:02 |
| seb128 | bryceh, what do you think? | 17:02 |
| sbeattie | bryceh: well, if we revert one or both, we should probably revert from the -security pocket as well. | 17:04 |
| bryceh | seb128, it looks to me like reverting the patches from 10.2 and 10.3 would be the way to go, until this is better understood. | 17:07 |
| seb128 | bryceh, great, can you get that done today and coordinate with sbeattie,mdeslaur to get the rollback in -security as well? | 17:08 |
| bryceh | seb128, certainly | 17:08 |
| seb128 | bryceh, then mlankhorst and cnd can probably investigate the segfault tomorrow | 17:08 |
| seb128 | bryceh, thanks | 17:09 |
| mlankhorst | cnd: ^ | 17:11 |
| mlankhorst | but yeah it's fine if it gets reverted for now | 17:11 |
| bryceh | sbeattie, I'm thinking just comment out the patches in question rather than doing a literal rollback to 10.1... sound right? | 17:11 |
| mlankhorst | sbeattie: the bug was filed before the security sru got released.. | 17:12 |
| sbeattie | bryceh: yes, that's fine. | 17:12 |
| mlankhorst | so I don't thin kit had anything to do with it | 17:12 |
| mlankhorst | I'm not going to object to a rollback for now though :) | 17:13 |
| cnd | the bug would result in the touchpad doing wonky things if you have disable trackpad while typing and you use it a bit, and then it starts to act like extra touches are on the touchpad when more than one touch is used | 17:14 |
| cnd | IIRC | 17:14 |
| cnd | the bug can also occur just by doing suspend/resume cycles | 17:14 |
| cnd | but it's stil not a crasher | 17:14 |
| cnd | bryceh, I thought the 10.2 was ok? | 17:14 |
| cnd | so just reverting the 10.3 changes would be good enough | 17:14 |
| cnd | seb128, correct? | 17:14 |
| cnd | btw, I have really terribly high latency here | 17:14 |
| cnd | wifi is terrible | 17:14 |
| seb128 | cnd, right, 10.2 is correct (but it had a xephyr segfault issue) | 17:15 |
| mlankhorst | seb128: not just xephyr | 17:15 |
| mlankhorst | xorg-server under some conditions as well | 17:15 |
| mlankhorst | it's mentioned in the changelog, but xephyr was the easiest way to trigger it (sorry really slow today) | 17:16 |
| bryceh | cnd, right; 10.3 attempted to fix the regression caused by 10.2. 10.2 itself was an attempt to fix a touchpad activation issue. | 17:17 |
| cnd | bryceh, I don't think I'll be much use today between the sprint, wifi instability, and lack of machines, so if you can take care of the revert please do | 17:18 |
| mlankhorst | so yeah rollback to 10.1 | 17:18 |
| mlankhorst | + security fix | 17:18 |
| bryceh | cnd, yep I'll take care of the revert | 17:18 |
| mlankhorst | thanks bryceh :) | 17:18 |
| cnd | ok | 17:19 |
| bryceh | mlankhorst, 10.4 added 516-dix-dont-emulate-scroll-events-for-non-existing-axes.patch which I'm guessing we'd like to keep? | 17:19 |
| mlankhorst | bryceh: I don't know, it should be in -proposed atm, not sure though if it is | 17:20 |
| cnd | +1 :) | 17:20 |
| mlankhorst | if not just comment it out again | 17:21 |
| bryceh | ok | 17:21 |
| mlankhorst | bryceh: I updated some drivers in xorg today btw to x1.13rc1 | 17:22 |
| mlankhorst | likely going to need to touch all of them | 17:22 |
| mlankhorst | since xaa was removed | 17:22 |
| bryceh | sbeattie, btw the security patch 509 probably should have been numbered 228. The comments in debian/patches/series are confusing but generally 5xx we were using just for the input frankenserver bits | 17:27 |
| bryceh | I'll fix the comments so this is clearer | 17:28 |
| seb128 | bryceh, btw do you know why apport doesn't trigger on xorg segfaults? | 17:28 |
| seb128 | bryceh, is that a known issue,being worked? | 17:28 |
| bryceh | seb128, yes it's a known issue discussed at UDS. I believe RAOF has the action item to work on it. | 17:30 |
| seb128 | bryceh, ok, thanks, I will check with him, if we had that we would probably have noticed that one earlier through errors.ubuntu.com | 17:30 |
| bryceh | seb128, it's not that they're not being triggered, but that they trigger only in some cases | 17:30 |
| seb128 | bryceh, well, that gimp segfault doesn't trigger it | 17:31 |
| seb128 | it might turn out to be a good testcase ;-) | 17:31 |
| bryceh | the xserver has it's own crash handling code, which we had to bypass to make it work with apport, and it's always been a bit flaky | 17:31 |
| sbeattie | bryceh: ah, okay. kees was the one who handed it to me, so I'd assumed he'd gotten the numbering correct. | 17:31 |
| sbeattie | bryceh: anyway, let me know and I can shepherd things through the -security pocket. | 17:32 |
| bryceh | sbeattie, yeah no prob, it's our fault that the sections weren't labeled clearly | 17:33 |
| bryceh | sbeattie, ok, 1.11.4-0ubuntu10.6 uploaded | 18:08 |
| sbeattie | bryceh: thanks. | 18:22 |
| kees | bryceh, sbeattie: oh, whoops. sorry about that patch numbering. I missed that note :( | 19:33 |
| === yofel_ is now known as yofel | ||
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