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| === Topic for #ubuntu-kernel: Ubuntu kernel development discussion ONLY | Kernel Wiki: https://wiki.ubuntu.com/KernelTeam | Latest kernel upload: 2.6.22-7.14 | Latest news: -rt and -xen kernels removed, failures in patch | linux-meta uploaded for gutsy 2.6.22 kernels. | New Kernel Team machine: http://kernel.ubuntu.com/ | ||
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| === Topic for #ubuntu-kernel: Ubuntu kernel development discussion ONLY | Kernel Wiki: https://wiki.ubuntu.com/KernelTeam | Latest kernel upload: 2.6.22-7.14 | Latest news: -rt and -xen kernels removed, failures in patch | linux-meta uploaded for gutsy 2.6.22 kernels. | New Kernel Team machine: http://kernel.ubuntu.com/ | ||
| === Topic (#ubuntu-kernel): set by crimsun at Tue Jun 26 00:17:30 2007 | ||
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| kraut | moin | 09:11 |
|---|---|---|
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| xivulon | mjg59: any luck with wubi? | 07:22 |
| mjg59 | xivulon: The kernel is stupid | 07:23 |
| mjg59 | Not convinced we can fix it for gutsy, but I'll see | 07:23 |
| xivulon | ? | 07:23 |
| mjg59 | The process freezer is used for suspend to RAM, but syslog is still trying to write when fuse is frozen | 07:23 |
| mjg59 | So the writing never completes | 07:23 |
| mjg59 | And suspend fails | 07:23 |
| xivulon | I see | 07:24 |
| xivulon | what about stopping syslog beforhand? | 07:24 |
| mjg59 | Syslog is just what fails in the trivial case | 07:24 |
| mjg59 | It could be any application | 07:24 |
| xivulon | I understand | 07:24 |
| xivulon | Note that in hibernation there is an added problem | 07:25 |
| xivulon | Swap is inside a mounted fs | 07:25 |
| mjg59 | Yes, hibernation is impossible | 07:26 |
| xivulon | So for instance we have lubi (the wubi version working on linux/ext3) where suspend works (since there is no fuse involved) but hibernation does not (I assume because the swap is not in a dedicated partition) | 07:26 |
| xivulon | mjg59 what would be an elegant way to turn off suspend/hibernation for the time being? | 07:28 |
| mjg59 | For gnome, there's a couple of gconf keys that you can set | 07:29 |
| Mithrandir | look at what casper does. | 07:30 |
| xivulon | The issue that wubi is not really gnome specific | 07:30 |
| xivulon | Also suspend might work in some cases (non-fuse host fs) | 07:31 |
| mjg59 | Policy is managed by individual applications | 07:31 |
| xivulon | Do they read "capabilities" from somewhere? | 07:32 |
| mjg59 | No | 07:32 |
| xivulon | What about acpi=off? | 07:32 |
| mjg59 | Ouch. No. | 07:33 |
| mjg59 | acpi is much more than power management | 07:33 |
| xivulon | I was expecting the ouch | 07:33 |
| mjg59 | (And it'll do nothing to influence hibernation) | 07:33 |
| xivulon | What about having a script in suspend.d that kills sleep.sh | 07:36 |
| xivulon | That will not take care of disabling the suspend/download buttons though... | 07:36 |
| xivulon | mjg59 as a side question. Any chance of having ntfs-3g as a kernel module? That would solve lots of issues | 07:37 |
| mjg59 | No | 07:37 |
| xivulon | I asked szaka (ntfs-3g) and he was not so inclined either... | 07:38 |
| mjg59 | It's not easy to port a fuse application to the kernel | 07:38 |
| xivulon | Last question (other than the suspend.d hack above): | 07:39 |
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| xivulon | Users do tend to hard reboot quite a lot | 07:39 |
| xivulon | Because often they come from windows and do not know what to do when they get stacked | 07:39 |
| xivulon | A nested fs is not the best environment for that | 07:40 |
| xivulon | What can be done to minimize damage? | 07:40 |
| mjg59 | Nothing | 07:40 |
| xivulon | I changed /etc/sysctl.conf on szaka suggestion | 07:40 |
| xivulon | vm.dirty_background_ratio=0 , vm.dirty_ratio=0 , vm.dirty_expire_centisecs=1 , vm.dirty_writeback_centisecs=1 | 07:42 |
| mjg59 | What sort of corruption are you actually seeing? | 07:43 |
| xivulon | Sometimes the hosted fs (ext3) might become unrecoverable, since data loss in the hosting fs might compromise the journal | 07:43 |
| xivulon | Alos hosting fs corruption has been reported (but chckfs normally can fix that) | 07:44 |
| xivulon | Using the above things seem to have improved | 07:44 |
| xivulon | Based on bug reports | 07:44 |
| mjg59 | Right. ext3 makes the assumption that writes to the journal actually end up in the journal | 07:45 |
| mjg59 | I'm not sure there's a good way around that | 07:45 |
| xivulon | According to szaka the sysctl parameters above should improve things but to be honest I have not looked up what they do exactly | 07:46 |
| xivulon | mjg59 any reason not to use the sysctl parameters above? | 07:47 |
| mjg59 | xivulon: Reduced performance, but I guess you'll have to take that hit | 07:48 |
| xivulon | so far it does not look to bad, so I guess I'll leave them there | 07:48 |
| xivulon | mjg59 last thing: is the idea of using a suspend.d script that makes sleep.sh exit so bad? | 07:48 |
| mjg59 | Yes | 07:49 |
| xivulon | ok | 07:49 |
| xivulon | That's all I had to ask, thank you very much for all your help | 07:49 |
| xivulon | very useful | 07:49 |
| johanbr | Is there are reason /dev/input/eventX would not be available immediately on resume? Sometimes my touchpad dies when I resume, and I think it's related to log entries like | 07:57 |
| johanbr | :0.log.4:Synaptics Touchpad no synaptics event device found (checked 17 nodes) | 07:57 |
| johanbr | :0.log.4:(EE) xf86OpenSerial: Cannot open device /dev/input/event3 | 07:57 |
| mjg59 | Yeah, synaptics seems a bit dumb. | 07:58 |
| johanbr | So it's the fault of the synaptics driver rather than the kernel? | 07:59 |
| mjg59 | Yes | 08:01 |
| johanbr | Alright. Well, you seem to be aware of the problem, so I'll just hope for a fix at some point in the future. :) Thank you. | 08:04 |
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