[kwlug-disc] Xenial Xerus Ubuntu 16.04 Release Party? [was: Why would an LTS install non-LTS kernels?]

[Bob Jonkman]

> the Xenial 16.04 kernel (4.x, due in August)

Actually, it's due on 21 April 2016. There's a release party in Toronto:

http://loco.ubuntu.com/events/ubuntu-ca/3330/detail/

(Death Wish coffee! Mmmm!)

Is there any interest in getting together for a Xenial Xerus Ubuntu
16.04 Release Party somewhere in KW?

--Bob.


On 2016-03-16 03:25 PM, Khalid Baheyeldin wrote:
> Thanks for that link. That explains what I have been seeing that
> various servers get different kernels depending on the HWE installed.
> 
> I have finally moved everything to 14.04 (no more 12.04). On servers,
> there is less 'exotic' hardware and therefore there are seldom any
> surprises.
> 
> On the desktop, it is another matter.
> 
> Per the schedule that is in the link you provided, 14.04 will have 5
> years of kernel 3.13, so I am good staying with that, until the time
> comes for moving to 16.04.
> 
> Perhaps I will try the Xenial 16.04 kernel (4.x, due in August).
> 
> On Tue, Mar 15, 2016 at 7:09 PM, Darcy Casselman <dscassel at gmail.com> wrote:
>> The LTS point releases ship updated kernels for hardware enablement.  The
>> process is described here: https://wiki.ubuntu.com/Kernel/LTSEnablementStack
>>
>> Generally I'd expect that things that work shouldn't stop working.  But I
>> know from experience that that assumption is naive.  It's software.  Stuff
>> breaks.  Also, it's the kernel, and they do strange things sometimes.
>>
>> Darcy.
>>
>> On Tue, Mar 15, 2016 at 5:03 PM, Khalid Baheyeldin <kb at 2bits.com> wrote:
>>>
>>> Finally got around to the task of reinstalling my laptop, using the
>>> warranty replaced SSD disk from OCZ.
>>>
>>> After installing Kubuntu 14.04, guvcview would not work with the built
>>> in webcam, but another USB webcam (actually a microscope of sorts).
>>> Both would give a black screen (no video).
>>>
>>> The USB webcam is supported by uvc (supposedly).
>>>
>>> usb 2-2: New USB device found, idVendor=1871, idProduct=7670
>>> usb 2-2: New USB device strings: Mfr=2, Product=3, SerialNumber=0
>>> usb 2-2: Product: USB2.0 UVC PC Camera
>>> usb 2-2: Manufacturer: GenesysLogic Technology Co., Ltd.
>>>
>>>
>>> Both were working fine with guvcview on the previous install (Ubuntu
>>> Server 14.04, then KDE Plasma Desktop on top, so should not be much
>>> different).
>>>
>>> A lengthy investigation ensued, using programs like Cheese, vlc,
>>> qtv4l2 test, ...etc. Some of them (e.g. Cheese) would work with the
>>> built in web cam, but not the USB webcam. Others (e.g. vlc) could work
>>> with the USB video, but NOT using the uvcvideo driver (e.g. v4l).
>>>
>>> So there was something with the uvcvideo kernel module for the USB
>>> webcam with an error like this:
>>>
>>> kernel: [  100.912205] uvcvideo: Failed to query (GET_DEF) UVC control
>>> 11 on unit 3: -32 (exp. 1).
>>>
>>> The reason I say uvc was the culprit is that other applications using
>>> other drivers do work.
>>>
>>> Luckily, I have the old disk lying around in the state it was in
>>> before I removed it from the laptop. I probed around, and found that
>>> the new Kubuntu install has a 3.19 kernel, while the old one Ubuntu
>>> Server LTS was 3.13.
>>>
>>> So, I installed the Trusty generic image:
>>>
>>> $ sudo aptitude install linux-image-generic-lts-trusty
>>>
>>> And purged the vivid ones:
>>>
>>> $ sudo aptitude purge linux-generic-lts-vivid
>>> linux-image-generic-lts-vivid linux-image-3.19.0-56-generic
>>> linux-image-3.19.0-25-generic linux-image-extra-3.19.0-25-generic
>>> linux-image-extra-3.19.0-56-generic
>>>
>>> After a reboot, both webcams work fine, as things were before.
>>>
>>> There is still the same error in dmesg, but things work as I want them
>>> too.
>>>
>>> So, the big questions are:
>>>
>>> 1. Why would something that works stop working in a point release of
>>> the kernel (remember that most devices have drivers written once, and
>>> then not touched at all).
>>>
>>> 2. Why would an LTS release install a non-LTS kernel?
>>> --
>>> Khalid M. Baheyeldin
>>> 2bits.com, Inc.
>>> Fast Reliable Drupal
>>> Drupal optimization, development, customization and consulting.
>>> Simplicity is prerequisite for reliability. --  Edsger W.Dijkstra
>>> Simplicity is the ultimate sophistication. --   Leonardo da Vinci
>>> For every complex problem, there is an answer that is clear, simple,
>>> and wrong." -- H.L. Mencken
>>>
>>>
>>> _______________________________________________
>>> kwlug-disc mailing list
>>> kwlug-disc at kwlug.org
>>> http://kwlug.org/mailman/listinfo/kwlug-disc_kwlug.org
>>>
>>
>>
>> _______________________________________________
>> kwlug-disc mailing list
>> kwlug-disc at kwlug.org
>> http://kwlug.org/mailman/listinfo/kwlug-disc_kwlug.org
>>
> 
> 
> 

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 246 bytes
Desc: OpenPGP digital signature
URL: <http://kwlug.org/pipermail/kwlug-disc_kwlug.org/attachments/20160316/f0590eba/attachment.sig>