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Author Topic: 2.6 Kernel  (Read 11892 times)

rpurdie

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2.6 Kernel
« Reply #15 on: December 31, 2004, 09:13:38 am »
Hi,

I'm one of the people working on the 2.6 kernel (I'm tackling the SL-C7xx support).

I'd be very interested to talk to people related to the Zaurus Kernel in Sharp for a variety of reasons.

I could really use some documentation. At the moment I don't even have datasheets for some of the key chips. Working blind slows me down a lot. I'd also like to try and work together with anything they're doing/planning rather than against them.

I'm concious of your comments on how Sharp and the people who wrote the code weren't neccessarily keyed into the Linux world or had "geek" objectives. I did wonder if Sharp would consider paying someone to work with the objective of making mainline linux kernels support their products? There would be benefits all around (Sharp and the comminity) to doing something like that.

Any information you could give us (or just me) on people to talk to at Sharp would be much appreciated.

Thanks,

Richard
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Ashitaka

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2.6 Kernel
« Reply #16 on: January 16, 2005, 09:02:03 am »
I have an official meeting planned with Sharp on Friday, with the guy working on 2.6 and one commercial. I don't know if it will be very useful, but I will try to do what I can...
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Zaurus SL-C760, SL-C860 and SL-6000
Sharp ROM 1.20 JP and pdaXrom RC8
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rpurdie

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« Reply #17 on: January 16, 2005, 09:33:43 am »
Quote
I have an official meeting planned with Sharp on Friday, with the guy working on 2.6 and one commercial. I don't know if it will be very useful, but I will try to do what I can...
[div align=\"right\"][a href=\"index.php?act=findpost&pid=62827\"][{POST_SNAPBACK}][/a][/div]

For reference, very basic support for the SL-C7xx models has now made it into the 2.6.11-rc1 mainline kernel. Further support has been added in 2.6.11-rc1-bk4.

The most complete support is still in openembedded as certain drivers still need some work to make them acceptable to mainline.

I'm not sure how Sharp are going to view this.
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Ashitaka

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2.6 Kernel
« Reply #18 on: January 18, 2005, 01:39:01 am »
The meeting has just been postponed  
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Zaurus SL-C760, SL-C860 and SL-6000
Sharp ROM 1.20 JP and pdaXrom RC8
512 MB SD Card, other memory, wireless and ethernet CF cards
www.nautilus6.org/operation/zaurus.html

Connor Angel

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« Reply #19 on: January 23, 2005, 09:15:15 am »
If a SL-5500 MMC driver ends up in kernel 2.6, OZ gets a donation from me.
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adf

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« Reply #20 on: January 25, 2005, 01:04:42 pm »
Yeah, a 100%open source zaurus would be a whole new ballgame. Sorry i only have the skill to cheer on the folks working at it.
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**3100 Zubuntu Jaunty,(working on Cacko dualboot), 16G A-Data internal CF, 4G SD, Ambicom WL-1100C Cf, linksys usb ethernet,  BelkinF8T020 BT card, Belkin F8U1500-E Ir kbd, mini targus usb mouse, rechargeble AC/DC powered USB hub, psp cables and battery extenders.

**6000l  Tetsuized Sharprom, installed on internal flash only 1G sd, 2G cf

nathanwms

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« Reply #21 on: March 25, 2005, 01:49:21 pm »
Anyone have an update on the progress of the 2.6 kernel?

Also, will the 2.6 kernel significantly improve the Zaurus experience and in what way?

The one area I'd really like to see an improvement in is video playback.  The new Archos PMA device has me drooling for that type of performance on my C760.  Is the Z's video performance limitations mainly a hardware issue or can it be greatly improved through software and possibly the 2.6 kernel?
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Nathan

SL-C760, Cacko 1.22
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adf

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« Reply #22 on: March 25, 2005, 04:22:46 pm »
udev.
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**3100 Zubuntu Jaunty,(working on Cacko dualboot), 16G A-Data internal CF, 4G SD, Ambicom WL-1100C Cf, linksys usb ethernet,  BelkinF8T020 BT card, Belkin F8U1500-E Ir kbd, mini targus usb mouse, rechargeble AC/DC powered USB hub, psp cables and battery extenders.

**6000l  Tetsuized Sharprom, installed on internal flash only 1G sd, 2G cf

rpurdie

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« Reply #23 on: March 26, 2005, 03:35:04 am »
Quote
Anyone have an update on the progress of the 2.6 kernel?

Also, will the 2.6 kernel significantly improve the Zaurus experience and in what way?

The one area I'd really like to see an improvement in is video playback.  The new Archos PMA device has me drooling for that type of performance on my C760.  Is the Z's video performance limitations mainly a hardware issue or can it be greatly improved through software and possibly the 2.6 kernel?
[div align=\"right\"][{POST_SNAPBACK}][/a][/div]

Current status is at: [a href=\"http://www.rpsys.net/openzaurus/]http://www.rpsys.net/openzaurus/[/url]

Support under 2.6 for the c7x0 is just about complete. The 2.6 kernel feels faster and much more stable. It also provides an excellent development platform for future work.

The c7x0's have an ati w100 graphics chip in them which is capable of acceleration so video performance can probably be improved. Certain video players use atilib (a closed source ati accecleration library). We have some idea of how this works but no official documentation. Any video players using this library are going to be faster. The 2.6 kernel has various sheduling tweaks which should help this kind of thing and all the system drivers are better written.

So, yes, 2.6 should help and by fully utilising the hardware, video can be improved. Documentation is a problem though.

OZ 3.5.3 will ship with a 2.6 kernel.
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maslovsky

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2.6 Kernel
« Reply #24 on: March 26, 2005, 04:42:02 am »
Quote
The one area I'd really like to see an improvement in is video playback.  The new Archos PMA device has me drooling for that type of performance on my C760.  Is the Z's video performance limitations mainly a hardware issue or can it be greatly improved through software and possibly the 2.6 kernel?
[div align=\"right\"][a href=\"index.php?act=findpost&pid=72263\"][{POST_SNAPBACK}][/a][/div]

No, you won't get video performance of Archos PMA on Zaurus with any kernel. Archos uses DSP processing support in TI Omap processor.
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tg

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« Reply #25 on: March 26, 2005, 09:48:25 am »
What about battery performance with new kernel? Is any improvement possible in this area?
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nathanwms

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« Reply #26 on: March 26, 2005, 10:31:12 am »
Thanks rpurdie and maslovsky, glad to see you are nearing completion and that the 2.6 will mean better performance.  I was hoping for a significant video boost, but I can make due for now til Sharp includes a better chipset in a future model.
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Nathan

SL-C760, Cacko 1.22
4GB Hitachi Microdrive, 256mb SimpleTech CF, 256mb Lexar SD
Ambicom BT2000-CF, Ambicom WL1100C wifi

rpurdie

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« Reply #27 on: March 28, 2005, 07:12:24 am »
Quote
What about battery performance with new kernel? Is any improvement possible in this area?
[div align=\"right\"][a href=\"index.php?act=findpost&pid=72365\"][{POST_SNAPBACK}][/a][/div]

I've done no tests on this. The charging/battery code is still roughly Sharp's 2.4 code but 2.6 has a much better power infrastructure which we use.

The biggest different will come from using cpufreq in ondemand mode but I've not had time to add that to 2.6 yet - its is planned.

We did have a bug where suspend/resume turned off turbo mode and I'm told this made a massive difference to battery life.
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speculatrix

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« Reply #28 on: March 28, 2005, 10:03:01 am »
2.4 to 2.6 benefits

in my experiencem when I used SuSE 8 and I switched from kernel 2.4 to 2.6, and turned on pre-emptive kernel, it made a big difference to the usability of a slower machine.

2.6 also has bluetooth built-in, improved USB, and a lot of extra niceties which should make the Z run better.

can't wait till there's a new 2.6 Cacko ROM!
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Gemini 4G/Wi-Fi owner, formerly zaurus C3100 and 860 owner; also owner of an HTC Doubleshot, a Zaurus-like phone.

ev1l

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« Reply #29 on: March 29, 2005, 08:38:12 am »
Very nice job so far, guys
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