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by jdb
Thu Jul 25, 2013 8:43 pm
Forum: Troubleshooting
Topic: USB/serial converters (not very) broken on Pi
Replies: 162
Views: 109786

Re: USB/serial converters (not very) broken on Pi

Both USB and LAN are dodgy on raspi not to mention SD card corruption problem. My advice to you is to buy a cheap Asus eee pc and run your card sharing server on it. I use it and it is rock-solid. You can buy a used one for around 60 euros. SD card corruption? https://github.com/raspberrypi/linux/c...
by jdb
Thu Jul 25, 2013 8:38 pm
Forum: Troubleshooting
Topic: Excessive current usage
Replies: 17
Views: 4839

Re: Hub getting hot

Weird. What is your TP1-TP2 voltage on the Pi with the Pi's power supply on? The only thing I can think of is internal and external power supplies fighting each other. Can you do a "loopback" power test? i.e. use hub external power, then plug one of the downstream hub ports with a USB A - micro B ca...
by jdb
Mon Jul 22, 2013 9:24 pm
Forum: Troubleshooting
Topic: Prevent SD-Card Corruption
Replies: 241
Views: 232803

Re: Prevent SD-Card Corruption

That sounds like I have to make sure that the PSU sense line needs more power take off then one raspberry pi. Where do I find this PSU sense lead? It should be on the 24pin header going to the motherboard? (I converted blindly an old PSU from a dell and hooked it up to a lacie nas server as that po...
by jdb
Sat Jul 20, 2013 9:18 pm
Forum: Troubleshooting
Topic: USB FIQ testing....
Replies: 181
Views: 72282

Re: USB FIQ testing....

I've identified two root causes of issues relating to USB audio DACs - one that was always there (caused by high interrupt loading), the other that was brought to the fore by the way the split-transaction allocation now works with the FIQ. These aren't going to be quick or simple fixes. For mitigati...
by jdb
Fri Jul 19, 2013 8:27 pm
Forum: Troubleshooting
Topic: USB External HDD Slow speed max 5.7 mb/s
Replies: 12
Views: 4580

Re: USB External HDD Slow speed max 5.7 mb/s

What does mount say?

NTFS (either ntfs-3g or kernel-mode driver) is CPU-intensive on Pi.
by jdb
Fri Jul 19, 2013 7:47 pm
Forum: Troubleshooting
Topic: USB FIQ testing....
Replies: 181
Views: 72282

Re: USB FIQ testing....

Oh - oops Yes, for single TT hubs they will only have one interface and so will omit the interface descriptor(s). bDeviceProtocol is the field to use. For comparison: sudo lsusb -v -d 1a40:0101 | grep bDeviceProtocol bDeviceProtocol 1 Single TT bDeviceProtocol 0 Full speed (or root) hub sudo lsusb -...
by jdb
Fri Jul 19, 2013 9:04 am
Forum: Troubleshooting
Topic: USB FIQ testing....
Replies: 181
Views: 72282

Re: USB FIQ testing....

GrayShade wrote:I only have the DAC and it seems it doesn't have asynchronous endpoints for playback:

dmesg output: http://pastebin.com/jVaZVNEd
lsusb output: http://pastebin.com/UsKWaZJF
What audio format are you playing? Sample rate/bitrate? I mean the source audio, not what you set ALSA to.
by jdb
Thu Jul 18, 2013 11:35 pm
Forum: Troubleshooting
Topic: USB/serial converters (not very) broken on Pi
Replies: 162
Views: 109786

Re: USB/serial converters (not very) broken on Pi

Jul 18 14:25:05 raspberrypi kernel: [ 7569.676554] NYET/NAK/ACK/other in non-error case, 0x00000002 Jul 18 14:57:25 raspberrypi kernel: [ 9509.790223] ERROR::handle_hc_chhltd_intr_dma:2579: handle_hc_chhltd_intr_dma: Channel 2, DMA Mode -- ChHltd set, but reason for halting is unknown, hcint 0x0000...
by jdb
Thu Jul 18, 2013 10:31 pm
Forum: Troubleshooting
Topic: USB FIQ testing....
Replies: 181
Views: 72282

Re: USB FIQ testing....

To anyone using USB audio DACs: The current FIQ implementation will make USB audio sound cards/DACs play very choppy/distorted/static sound if all of the following conditions are met: - You have a hub with a single Transaction Translator (cheap chip inside) - You plug another full speed/low speed de...
by jdb
Tue Jul 16, 2013 10:58 pm
Forum: Troubleshooting
Topic: USB dongle appears in lsusb but not in /dev
Replies: 25
Views: 12591

Re: USB dongle appears in lsusb but not in /dev

I have one of these. WorksForMe(tm) [ 28.788802] hub 1-1.3:1.0: state 7 ports 7 chg 0000 evt 0008 [ 28.789430] hub 1-1.3:1.0: port 3, status 0101, change 0001, 12 Mb/s [ 28.949241] hub 1-1.3:1.0: debounce: port 3: total 100ms stable 100ms status 0x101 [ 29.029226] usb 1-1.3.3: new high-speed USB dev...
by jdb
Mon Jul 15, 2013 4:22 pm
Forum: Troubleshooting
Topic: [SOLVED] Wireless no longer working - latest kernel?
Replies: 34
Views: 7866

Re: Wireless no longer working - latest kernel?

@joan

So have you seen any further instances of the error message ERROR::handle_hc_chhltd_intr_dma:2537:etc etc?
by jdb
Mon Jul 15, 2013 12:10 pm
Forum: Troubleshooting
Topic: [SOLVED] Wireless no longer working - latest kernel?
Replies: 34
Views: 7866

Re: Wireless no longer working - latest kernel?

What are the associated symptoms? Wireless stops working, I assume. Are you pressing alt-sysrq locally? Both these things are indicative of "better" - USB itself is not broken, and is responding correctly to failed transfers to a device. Once the wifi dongle enters that error state, does a replug re...
by jdb
Sun Jul 14, 2013 6:31 pm
Forum: Troubleshooting
Topic: [SOLVED] Wireless no longer working - latest kernel?
Replies: 34
Views: 7866

Re: Wireless no longer working - latest kernel?

http://modarchive.org/index.php for your listening pleasure, just need a pi mod player ... mikmod? A full kernel recompile is too much for today. Is there a no pressure ETA on the roll-out? The roll-out has to take into consideration ~1x10^6 Pi users with all manner of uses of their hardware. If we...
by jdb
Sun Jul 14, 2013 3:51 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Short negative pule while opening UART
Replies: 8
Views: 2429

Re: Short negative pule while opening UART

I can find a workaround, but bug like this makes Raspberry Pi an unreliable, immature platform. That's sad. If this is a known problem, where can I learn more about it? Is it a problem with Linux kernel or BCM2835? Sigh. The platform is _not_ immature and unreliable simply because of a 32uS glitch ...
by jdb
Sun Jul 14, 2013 1:43 pm
Forum: Troubleshooting
Topic: [SOLVED] Wireless no longer working - latest kernel?
Replies: 34
Views: 7866

Re: Wireless no longer working - latest kernel?

I can reproduce this locally.

Proposed fix is now on https://github.com/P33M - if you are savvy with compiling your own kernels then please do give it a try and report back. If not then PM me and I can get a binary to you.
by jdb
Sat Jul 13, 2013 8:35 pm
Forum: Troubleshooting
Topic: ERROR::handle_hc_chhltd_intr_dma:2537:
Replies: 10
Views: 6869

Re: ERROR::handle_hc_chhltd_intr_dma:2537:

Glossary menagerie time: Interrupts on pretty much all processors (caused by one of several things, but in this case a piece of hardware going "please sir, can I have some more?") are referred to as I nterrupt R e q uests. To fix some of the fundamental limitations of the USB hardware and driver, we...
by jdb
Sat Jul 13, 2013 6:12 pm
Forum: Troubleshooting
Topic: ERROR::handle_hc_chhltd_intr_dma:2537:
Replies: 10
Views: 6869

Re: ERROR::handle_hc_chhltd_intr_dma:2537:

Funny, that's just what I spent the last week working on. Patch is imminent. For those that want to know the gory details, the FIQ will now respond to Host Channel interrupts as well as SOFs. This is to steal split transaction processing away from the large and cumbersome IRQ handlers in the main dr...
by jdb
Thu Jul 11, 2013 9:28 pm
Forum: Troubleshooting
Topic: Raspberry Pi rebooting when I connect my External HD
Replies: 4
Views: 713

Re: Raspberry Pi rebooting when I connect my External HD

Hello The reboot you are seeing is because the Pi's 5V line drops low when you plug the HDD in. I assume the WD Passport does not have an external power supply and thus draws all its power from the USB port. On the moment of connection, the HDD will draw a large amount of current. It cannot control ...

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