Reboot, Downtime

I host my Web-site on my private computer at home, the one I name ‘Phoenix’. This is different from how most Web-sites today are hosted.

Phoenix received a kernel-update today by way of the package manager, which also required a routine reboot. As a result, my Web-site would have been inaccessible from about 20h05 to 20h15.

Also, I could not have posted a notification on my actual blog, indicating Maintenance Mode, because to output such a message would at least require that the server itself be running. Yet, there has been no real disruption to my Web-server, outlasting this reboot.

I apologize for any inconvenience.



Klystron Kernel Update Ends Suspend To RAM Experiments.

Only a few days ago, because that laptop is fully subscribed to Kanotix, the computer with the network name ‘Klystron’ received another kernel update, this time to version ‘4.4.0-34-generic‘, which for some reason also goes by the name ‘4.4.0-35Kanotix‘. This has had slightly sad, but also good consequences:

  1. I can no longer allow Klystron to Suspend To RAM, as by now, doing so sets the time-last-modified of the super-block of its FS into the future. In fact, after a recent reboot, the log-in manager also reported to me, that it was unable to enter the home directory of the main user. This gave me quite a shock, until I noticed, that I was still able to log in as the auxiliary user, after which a full reboot also fixed the super-block. What this means is that all my experiments with Suspend To RAM must end, including hoping that its WiFi chip-set will work after resuming. But, I had written several times, that the performance of the WiFi had improved, as long as I do not suspend the laptop…
  2. I can now focus on a user-configuration, by which closing the laptop lid locks it, but hopefully, the WiFi will stay connected. In hopes of improving the chances of that, in addition to the fact that support may have already been improved in the latest kernel versions, I have additionally set my router only to use a signal-width of 20MHz, i.e. not to use ‘channel bonding’. My logic behind that is, that higher speeds might look good, as long as the signal strength is good. But to cope with the possibly weaker signal of the lid being closed, a narrower WiFi signal-width, as set from the router, may help improve reliability.

But whether that pans out, only time will be able to tell. Even if it does not, simply having the WiFi disconnect and then reconnect, as I reopen the lid, should not be the end of the world.



Latest Kernel Update Fails To Solve One Specific Problem.

According to my recent postings, the Linux laptop I name ‘Klystron’ has received a kernel update to version 4.4.0-30-generic. In This Posting, I had written of a specific bug that happened on the laptop, whenever I told it to Suspend To RAM. Specifically, after Resuming, the system clock would end up set exactly 68 hours into the future.

According to my latest test, This latest kernel update did not solve that problem. Therefore, for the time being, I will need to rely on a script which I specifically adapted, to correct the error whenever it happens.



Klystron, Kernel Update a Success

The laptop which I name ‘Klystron’, received a Kernel Update on July 7. This brought its kernel version to 4.4.0-30-generic as far as I can tell.

Prior to this update, one of the problems the laptop was still experiencing, was due to its Realtek WiFi chip-set, and the kernel module ‘RTL8723BE’. It had a malfunction in how it was connecting to my WiFi, which should have set in twice again, since July 7, according to earlier observations I had made. This bug had become quite predictable.

But since the latest kernel update, this malfunction has not been taking place anymore.

So I would say, that this kernel update was a huge, welcome success.

A separate question I have not yet answered, was whether its Suspend Behavior has also been corrected. This will be slightly more complicated for me to test, because as the above posting suggests, I had adapted a script, which seems to correct it. If the problem had been resolved in the kernel update, my script would simply not do anything. And the end result would remain, that the problem is not apparent.

In order to see whether the kernel update actually resolved that issue, I would first need to disable my script, and then try a few Suspend Cycles, since this problem was also not taking place with 100% consistency.

I have not yet committed myself to doing that.