Category Archives: Hacks

Fedora 17, KDE, and USB Disks – a Workaround!

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After recently upgrading from Fedora 16 to 17, I found that USB disk mounts in KDE were failing: Could not mount the following device An unspecified error has occurred Not Authorized I finally found a workaround at http://www.suurmeijer.net, and I have slightly modified it: Edit /usr/share/polkit-1/actions/org.freedesktop.udisks.policy as follows:   <action id=”org.freedesktop.udisks.filesystem-mount”> <description>Mount a device</description> <description xml:lang=”da”>Montér en … Continue reading →

Pi Power and Hub – It’s All About the Power Supply??.

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After many fruitless attempts to cobble together a working USB hub setup for the Raspberry Pi, I came to the conclusion – after trying all the USB/mains power adapters I had (from various phones and other accessories), that the power supply made a significant difference to the behaviour of the Pi..     With some adapters, I had to … Continue reading →

Pi – USB – The Saga Continues..

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Thought I would try a couple more options, just in case.. First, I confirmed that the USB sound card works connected directly to one of the Pi USB ports (using a USB extension cable): usb 1-1.2: new full speed USB device number 13 using dwc_otg usb 1-1.2: New USB device found, idVendor=0d8c, idProduct=000c usb 1-1.2: New USB … Continue reading →

The Pi / Hub / Power Saga – Running with Scissors..

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Another option I just tried turned nasty very quickly…    I wondered what would happen if all external USB devices were connected via the (powered) hub, but the answer was soon apparent: usb 1-1.3.1.1: reset low speed USB device number 6 using dwc_otg usb 1-1.3.1.2: reset full speed USB device number 7 using dwc_otg INFO:: periodic_channel_available: Total channels: … Continue reading →

Pi – Near-Death Experience…

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My Raspberry Pi had been behaving itself on the ‘hardware’ side since I took possession of it, weeks ago.    After reading about limitations of USB connectivity, I obtained a reasonably-priced powered USB hub, with the intention (not surprisingly!) of connecting more things – including testing the possibility of USB sound.. So….  I connected the USB hub, and … Continue reading →

Pi to 3.1.10..

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I had noticed that the OpenELEC XBMC build for the Raspberry Pi included a 3.1.10 kernel, so decided to ‘update’ my Fedora 17 card to this, using the OpenELEC kernel source, cross-compiled.. So..  Now running Fedora 17 on a 3.1.10 kernel: $ uname -a Linux rgpi 3.1.10 #1 Tue May 8 13:41:06 BST 2012 armv6l armv6l armv6l … Continue reading →

Fedora 17 on the Pi!

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After applying the SD Card disk formatting and ‘optimisation’ mentioned previously, I decided to attempt to bring the version of Fedora (14) up to date.. The Fedora 17 Pi ‘respin’ is due sometime in May, but I decided – based on my experiences with Fedora 17 on the Dreamplug – to try to ‘hack’ F17 from the … Continue reading →

Linux ARM and SD Card Performance – Let the Fun Begin!

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Despite previous ‘tweaks’, I have been experiencing continuing problems with SD Card Linux performance, and with the unreliable operations of yum / rpm, with associated db corruption, when they have to be ‘killed’ after hanging.. Based on two excellent pieces of prior research: http://blogofterje.wordpress.com/2012/01/14/optimizing-fs-on-sd-card/     and    http://www.raspberrypi.org/forum/projects-and-collaboration-general/optimizing-linux-for-flash-memory – I will be having a stimulating (!) time performing formatting … Continue reading →

Pi Performance?

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I had intended to persevere with the Fedora 14 ‘respin’, despite it being (correctly, IMHO..) described as ‘a bit buggy’..     Performance was improved with the newer 3.1.9+ kernel image, without the debug messages, but overall the response was still very sluggish..    I selected XFCE as the UI, as I had used this – successfully – with Fedora … Continue reading →

Compiling the Pi Kernel.. My Way..

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This is how I compile ARM kernels.  There are other ways of doing this, but this works, for me.. First – I should mention – Read the Wicki!    This is at http://elinux.org/R-Pi_Hub After getting the ‘forked’ kernel I then had to obtain a suitable config file, which included the necessary extra items for the Pi Broadcom chipset..   … Continue reading →