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Revision as of 12:50, 8 June 2013 editGuy Macon (talk | contribs)Extended confirmed users, File movers, New page reviewers, Pending changes reviewers, Rollbackers59,287 edits Wrong numbers?: new section← Previous edit Revision as of 08:54, 9 June 2013 edit undoRehevkor (talk | contribs)Extended confirmed users, Pending changes reviewers, Rollbackers19,286 edits Disputed info from 121.72.118.83 on USB power and Memory clockNext edit →
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Higher clock speed because lower causes corruption? "changed from to"? A drop almost 50%? Could someone please check these numbers? --] (]) 12:50, 8 June 2013 (UTC) Higher clock speed because lower causes corruption? "changed from to"? A drop almost 50%? Could someone please check these numbers? --] (]) 12:50, 8 June 2013 (UTC)

== Disputed info from 121.72.118.83 on USB power and Memory clock ==

I found which seems to be disputed because the reference is a forum thread. But I still find it useful. So it's here it is should anyone need it:

:# Originally the on-board USB ports were designed for USB devices using one "unit load" (100 mA) of current. Devices using more than 100&nbsp;mA were incompatible with the Raspberry Pi, and for them a ] was required. However, due to user feedback, the RPF, at the end of August 2012, decided to remove the USB ]s which largely caused this behaviour. However, the maximum current that can be delivered to a USB port on these modified boards is still limited by the capabilities of the power supply used, and the 1.1&nbsp;A main polyfuse. Spontaneous rebooting and/or crashing caused by hot plugging certain USB devices was introduced as a result of this change, which further reduced the standards compliance of the Raspberry Pi's USB implementation.<ref>{{cite web|url=http://www.raspberrypi.org/phpBB3/viewtopic.php?f=24&t=5830 |title=Design flaw? Polyfuses for USB current limiting |publisher=Raspberrypi.org |date= |accessdate=2012-06-22}}</ref>

:/../

:# The five overclock ("turbo") presets were changed because overclocking the core causes SD card corruption, apparently due to bugs in the BCM2835 SoC. They originally were:

:## "None"; 700&nbsp;MHz ARM, 250&nbsp;MHz core, 400&nbsp;MHz SDRAM, 0 overvolt,
:## "Modest"; 800&nbsp;MHz ARM, 300&nbsp;MHz core, 400&nbsp;MHz SDRAM, 0 overvolt,
:## "Medium" 900&nbsp;MHz ARM, 333&nbsp;MHz core, 450&nbsp;MHz SDRAM, 2 overvolt,
:## "High"; 950&nbsp;MHz ARM, 450&nbsp;MHz core, 450&nbsp;MHz SDRAM, 6 overvolt,
:## "Turbo"; 1000&nbsp;MHz ARM, 500&nbsp;MHz core, 500&nbsp;MHz SDRAM, 6 overvolt
] (]) 00:20, 9 June 2013 (UTC)
:Do we have any reliable sources for this? '''<FONT COLOR="red">Я</FONT>ehevkor''' <big>]</big> 08:54, 9 June 2013 (UTC)

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Edit request on 10 May 2013

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Please change the memory on the Model A to 512MB as it now has the same memory as the Model B. 50.43.89.24 (talk) 23:33, 10 May 2013 (UTC)

 Not done The model A still has 256MB of RAM, not 512MB! Originally the model A was planned to have 128MB of RAM but by the time of the actual launch the RPF managed to increased it to 256MB.
So unless you have a source that proofs that the model A now has 512MB the current information is still correct. Mahjongg (talk) 00:54, 11 May 2013 (UTC)
 Not done: per Mahjongg, (change the |answered= parameter to yes next time). Michaelzeng7 (talk) 01:27, 11 May 2013 (UTC)

Edit request on 20 May 2013

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The Raspberry Pi Camera has just been released. Please update! Nagol68 (talk) 20:27, 20 May 2013 (UTC)

 Not done: it's not clear what changes you want to be made. Please mention the specific changes in a "change X to Y" format and provide a reliable source if appropriate. —KuyaBriBri 21:15, 20 May 2013 (UTC)

 Done Mahjongg (talk) 15:24, 7 June 2013 (UTC)

Wayland (and Weston), X successor on Pi

http://www.phoronix.com/scan.php?page=news_item&px=MTM3NzM http://www.phoronix.com/scan.php?page=news_item&px=MTM3NzI

Useable right now(?) from source or when: http://www.phoronix.com/scan.php?page=news_item&px=MTM2MTM

Comp.arch (talk) 16:54, 24 May 2013 (UTC)

Wrong numbers?

The articles currently says:

In the highest ("turbo") preset the SDRAM clock was originally 500 MHz, but this was later changed from to 600 Mhz because 500 MHZ sometimes causes SD card corruption. Simultaneously in "High" mode the core clock speed was lowered from 450 to 250 MHz.

Higher clock speed because lower causes corruption? "changed from to"? A drop almost 50%? Could someone please check these numbers? --Guy Macon (talk) 12:50, 8 June 2013 (UTC)

Disputed info from 121.72.118.83 on USB power and Memory clock

I found this addition which seems to be disputed because the reference is a forum thread. But I still find it useful. So it's here it is should anyone need it:

  1. Originally the on-board USB ports were designed for USB devices using one "unit load" (100 mA) of current. Devices using more than 100 mA were incompatible with the Raspberry Pi, and for them a self-powered USB hub was required. However, due to user feedback, the RPF, at the end of August 2012, decided to remove the USB polyfuses which largely caused this behaviour. However, the maximum current that can be delivered to a USB port on these modified boards is still limited by the capabilities of the power supply used, and the 1.1 A main polyfuse. Spontaneous rebooting and/or crashing caused by hot plugging certain USB devices was introduced as a result of this change, which further reduced the standards compliance of the Raspberry Pi's USB implementation.
/../
  1. The five overclock ("turbo") presets were changed because overclocking the core causes SD card corruption, apparently due to bugs in the BCM2835 SoC. They originally were:
    1. "None"; 700 MHz ARM, 250 MHz core, 400 MHz SDRAM, 0 overvolt,
    2. "Modest"; 800 MHz ARM, 300 MHz core, 400 MHz SDRAM, 0 overvolt,
    3. "Medium" 900 MHz ARM, 333 MHz core, 450 MHz SDRAM, 2 overvolt,
    4. "High"; 950 MHz ARM, 450 MHz core, 450 MHz SDRAM, 6 overvolt,
    5. "Turbo"; 1000 MHz ARM, 500 MHz core, 500 MHz SDRAM, 6 overvolt

Electron9 (talk) 00:20, 9 June 2013 (UTC)

Do we have any reliable sources for this? Яehevkor 08:54, 9 June 2013 (UTC)
  1. "Design flaw? Polyfuses for USB current limiting". Raspberrypi.org. Retrieved 2012-06-22.
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