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by jdb
Sat Apr 05, 2014 10:49 pm
Forum: Troubleshooting
Topic: Just received, USB not working? (solved)
Replies: 8
Views: 1235

Re: Just received, USB not working?

Slow down a bit:

You can use NOOBS with either a mouse or a keyboard. It doesn't need both.

I suggest that you use only the mouse to test if your USB ports are faulty; see if it works in either of the ports and whether booting with the mouse already plugged in changes things.
by jdb
Sat Apr 05, 2014 10:21 pm
Forum: Troubleshooting
Topic: Audio noise with external amplifier
Replies: 55
Views: 12945

Re: Audio noise with external amplifier

This is strange, this device doesn't have a dedicated power supply, so it should have the noise too. Maybe your 5V power supply is better than mine ? There are several factors in play here. If you are using the Pi's audio output, the noise coupled from digital sources to the audio output is more-or...
by jdb
Fri Apr 04, 2014 9:53 pm
Forum: Troubleshooting
Topic: Call for beta testers: FIQ_FSM USB driver rewrite
Replies: 250
Views: 124189

Re: Call for beta testers: FIQ_FSM USB driver rewrite

Just when I thought I'd seen everything... Your device supports a single transfer size of 600 bytes per frame with a feedback endpoint that's updated every frame. The device also claims to support 24 bit depth at 32k/44.1k/48k/88.2k/96k sample rates, all through this one endpoint. I bet that your FL...
by jdb
Fri Apr 04, 2014 4:27 pm
Forum: General discussion
Topic: New Website
Replies: 94
Views: 38271

Re: New Website

I'd have preferred a design that works speedily in Midori on a 256MB pi. If it works there then it should work pretty much anywhere. The main issue with speed appears to be that unscaled images are being used in several places on the front page. The overall download size when you hit the page witho...
by jdb
Thu Apr 03, 2014 8:59 pm
Forum: Troubleshooting
Topic: SSH connection problem after drive spin down.
Replies: 5
Views: 1246

Re: SSH connection problem after drive spin down.

Certain USB - HDD controllers react extremely badly when asked to spin down the disk (usually implemented by suspend or similar). /var/log/kern.log should contain all recent kernel messages. Wait until the drive spins down, then wait a further 2-3 minutes and restart the Pi. The messages from the la...
by jdb
Thu Apr 03, 2014 8:28 pm
Forum: Troubleshooting
Topic: Call for beta testers: FIQ_FSM USB driver rewrite
Replies: 250
Views: 124189

Re: Call for beta testers: FIQ_FSM USB driver rewrite

Please post a full dmesg log that includes the "FIQ reported NYET" messages.

Also, please post a full lsusb -v with devices plugged in.

It's highly odd that simply playing FLAC breaks things.
by jdb
Thu Apr 03, 2014 7:18 pm
Forum: General discussion
Topic: New Website
Replies: 94
Views: 38271

Re: New Website

Take out your phone, go to BBC.co.uk and do the same on your desktop. It's the same design - not two different ones. The design is responsive, meaning it will adjust and resize it's content, text, images, etc to fit the browser width without having to screw around zooming in and scrolling left to r...
by jdb
Wed Apr 02, 2014 8:20 pm
Forum: General discussion
Topic: New Website
Replies: 94
Views: 38271

Re: New Website

bertwert wrote:Why is this in Plan 9 subforum?
Wouldn't General Discussion be better?
Er, it's a Global Announcement - visible on all the fora?
by jdb
Wed Apr 02, 2014 8:09 pm
Forum: Troubleshooting
Topic: Call for beta testers: FIQ_FSM USB driver rewrite
Replies: 250
Views: 124189

Re: Call for beta testers: FIQ_FSM USB driver rewrite

@pmmd: But in that 3 seconds, the device would have transferred 3*8000 = 24,000 frames of data. Only two have reported frame overrun. This contrasts with your previous report where you had 16 errors in 3 seconds. A factor of 8 difference when all you've changed is the userspace CPU loading is signif...
by jdb
Wed Apr 02, 2014 6:31 pm
Forum: General discussion
Topic: New Website
Replies: 94
Views: 38271

Re: New Website

I've got to say I'm pretty shocked you didn't make the site responsive. That's pretty much the equivalent of making an IE6-only website in the year 2008. Why on earth is the new site not responsive? Seems pretty responsive when I poke it. Though I think the screams may be coming from Ben. It seems ...
by jdb
Wed Apr 02, 2014 1:48 pm
Forum: Troubleshooting
Topic: USB 3.0 WITH PI ??
Replies: 1
Views: 518

Re: USB 3.0 WITH PI ??

USB3.0 devices are backwards-compatible with 2.0 host ports.

In general, USB2.0/3.0 flash drives provide "better" performance than Class 10 SD cards as they are not so tightly optimised for large contiguous read/write activity.
by jdb
Wed Apr 02, 2014 11:59 am
Forum: Troubleshooting
Topic: Call for beta testers: FIQ_FSM USB driver rewrite
Replies: 250
Views: 124189

Re: Call for beta testers: FIQ_FSM USB driver rewrite

Can you retry the test without using a cpu-intensive program? I.e. just stream data from the device and pipe it to /dev/null? There are multiple possibilities that may result in transfers reporting overrun (-63 isn't "buffer overrun" in the context of the USB HCD, it means the frame overran before t...
by jdb
Tue Apr 01, 2014 7:42 pm
Forum: Off topic discussion
Topic: Backdoors Everywhere
Replies: 14
Views: 6770

Re: Backdoors Everywhere

Yes. Quite.

ladybug, as far as I can see in your posting history you have had nothing relating to Raspberry Pi.

Please refrain from making any more off-topic posts.
by jdb
Tue Apr 01, 2014 7:05 pm
Forum: Off topic discussion
Topic: Backdoors Everywhere
Replies: 14
Views: 6770

Re: Backdoors Everywhere

Nah, I heard that was why they banned Lenovo laptops everywhere because they thought they might have a Huawei back-door somewhere, but laughbly loads of people love Lenovo buisness laptops. I guess your only safe if your running something other than proprietary rubbish, it's always been in the driv...
by jdb
Tue Apr 01, 2014 7:46 am
Forum: Troubleshooting
Topic: USB: Intr/Bulk/Isoch IN-transfer into unaligned URB buffer
Replies: 1
Views: 543

Re: USB: Intr/Bulk/Isoch IN-transfer into unaligned URB buff

Both buffers are allocated as DMA-contiguous memory. This keeps a page table mapping that ensures they are kept coherent as far as the ARM is concerned. The bus addresses given to the peripheral *are* in the Videocore L2 caching range, though. Fortunately the peripheral bus accesses hit the L2 cache...
by jdb
Sun Mar 30, 2014 10:50 am
Forum: General discussion
Topic: Raspberry PI vs TSA?
Replies: 4
Views: 1023

Re: Raspberry PI vs TSA?

Print out a flyer explaining what it is and put it in the box with the Pi.

Not one you put together yourself: the quick-start guide for example.
by jdb
Fri Mar 28, 2014 8:28 pm
Forum: General discussion
Topic: Disable & uninstall HDMI raspberry pi
Replies: 2
Views: 644

Re: Disable & uninstall HDMI raspberry pi

The receiving device (i.e. the TV) has to provide +3.3v referenced current sources that the HDMI drivers inside the Pi use to signal differentially. HDMI on the Pi doesn't switch any current if it's not plugged in. Additionally, if the bootloader doesn't detect a HDMI connector in the port then unle...
by jdb
Fri Mar 28, 2014 8:24 pm
Forum: Troubleshooting
Topic: Minecraft seems to 'kill' our Pi?
Replies: 1
Views: 530

Re: Minecraft seems to 'kill' our Pi?

Minecraft uses the 3D engine which adds to the power consumption of the Pi. It is likely that your power supply is just adequate enough to run the Pi without h264/3d working, but as soon as you use the hardware blocks then bad things happen. - Measure the voltage between TP1 and TP2 with a multimete...
by jdb
Thu Mar 27, 2014 8:55 am
Forum: Troubleshooting
Topic: Call for beta testers: FIQ_FSM USB driver rewrite
Replies: 250
Views: 124189

Re: Call for beta testers: FIQ_FSM USB driver rewrite

One thought: do you have dwc_otg.fiq_fsm_mask=0x7 and dwc_otg.fiq_fsm_enable=1 set in /boot/cmdline.txt? Your dmesg output is truncated.
by jdb
Wed Mar 26, 2014 10:12 pm
Forum: General discussion
Topic: Pi audio noisy?
Replies: 4
Views: 1077

Re: Pi audio noisy?

The 3.5mm audio jack on the Pi is derived from RC-filtered output from the PWM peripheral. The resolution of the PWM is 11 bits (66dB SNR, which is equivalent to a FM broadcast with a decent signal strength). If you have not updated to latest, the rpi-update firmware adds a 1-LSB dither which should...
by jdb
Wed Mar 26, 2014 9:56 pm
Forum: Troubleshooting
Topic: USB Keyboard Not Recognized (other threads haven't helped!)
Replies: 5
Views: 1203

Re: USB Keyboard Not Recognized (other threads haven't helpe

When you set dwc_otg.speed=1 it forces the bus speed to full-speed. Low-speed transactions take place across a full-speed bus as a special preamble token is passed to signal the start of a low-speed transaction. The OTG core on the Pi is interfaced to a UTMI+ level 2 PHY. This PHY implements high- a...
by jdb
Wed Mar 26, 2014 1:04 pm
Forum: Troubleshooting
Topic: Call for beta testers: FIQ_FSM USB driver rewrite
Replies: 250
Views: 124189

Re: Call for beta testers: FIQ_FSM USB driver rewrite

Sure, please note that the device needs a lot bandwidth: It uses a resolution of 720x480px with 30 fps and 2 Byte/px uncompressed. lsusb: http://pastebin.com/mEvKz2xv dmesg: http://pastebin.com/xjhUY59g Ah. Random packets within the sequence assigned to the FIQ are reporting frame overruns. This is...
by jdb
Tue Mar 25, 2014 9:29 pm
Forum: Troubleshooting
Topic: Call for beta testers: FIQ_FSM USB driver rewrite
Replies: 250
Views: 124189

Re: Call for beta testers: FIQ_FSM USB driver rewrite

Defiant wrote:No visible improvement on stk1160 Video grabber.
Please post full dmesg since boot and lsusb -v for the device.
by jdb
Tue Mar 25, 2014 10:38 am
Forum: Troubleshooting
Topic: Call for beta testers: FIQ_FSM USB driver rewrite
Replies: 250
Views: 124189

Re: Call for beta testers: FIQ_FSM USB driver rewrite

Thanks for the feedback.

If anyone has any high-speed isochronous devices that are data sinks (i.e. video playback or output) it'd be interesting to see if those work.
by jdb
Sun Mar 23, 2014 6:22 pm
Forum: General discussion
Topic: Sony CMOS Sensor: SonyIMX179
Replies: 12
Views: 13708

Re: Sony CMOS Sensor: SonyIMX179

This sounds awfully like spam, but I'm going to bite anyway.

What were you hoping to achieve by interfacing an IMX179 to the Pi?

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