Sunday, January 9, 2011

Art O'neill Challenge 2011

Amazing event. Around 100 runners departed Dublin Castle at 2am through the streets and out of town. The road on higher ground was slushy packed snow from the 400 walkers that left at midnight. Took it real steady to avoid over doing it too early but was feeling good on the steepest part of the hill and pushed the pace a bit. After 15 miles of road, Kippure House was the first checkpoint. I had some soup, snickers, changed my top layers and filled my pack with more gear. I decided to keep going in running shoes and my feet felt good so I didn't change socks.

Leaving Kippure House there were about 15 hikers and runners ahead of me. I could see their lights heading up Ballinabrocky and eventually caught a group at the top. My feet were totally soaked from bog at this point but not cold. With the help of GPS, I eventually found the trail down and then back on to the road for a few miles. The fog was thick now and there was a slight tailwind so it didn't feel too cold probably about -2C. I caught and passed one runner climbing up to Ballynultagh Gap. There was a checkpoint there and the guy told me there was 4 in front of me, but the fog was too thick to see any lights heading up Black Hill. The trail up Black Hill was easy to follow the lower part had some big puddles that were iced over. There was an inch or 2 of freshly fallen snow so I could see the track of the others. I broke through a few puddles and got soaked again but feet were still ok. After the summit of Black Hill, it was onward to Billy Byrne's Gap. The trail disappeared and the fog was thick so I relied on the compass and GPS and headed through the frozen bog. I found the gap and then dropped down eventually out of the fog and headed to the lights of Glenbride village. I got a little lost amongst the houses and had to jump over a couple walls. Then I found the grassy trail down to the road.

At the Ballinagee Bridge checkpoint I had a cup of porridge and a Redbull. The guys told me that I was in 2nd place. I headed across the road into the forest and onto good fire road leading to the river. There was a faint wet trail heading up the river and it started getting light out. I could now make out the ridge line on the right so I crossed the river and headed up toward the ridge. As I went back into the cloud, it started snowing and the temperature was dropping. The wind howled over the ridge and the terrain got nasty as I headed toward Three Lakes. Huge tussocks and deep bog gully's filled with snow and ice. I was watching for the lake on the right, but then spotted it on the left. I overshot it. I came around it and got really disoriented. I came across some fresh tracks which had to be Eoins but they were going the wrong direction. I was heading back north. Dangit. I turned around and kept going constantly checking the compass. Eventually I hit the Avonbeg river. Following the river was harder than I thought it would be. The river banks were steep and snowy. Finally I could see the Table Track, got onto it and headed down the Glenmalure Valley. I only saw 1 set of footprints so was pretty confident I was still in second. The last 2 miles were long and really icy but the sun was rising through the mist at the end of the valley. Amazing. I finished 18 minutes behind Eoin.

Monday, January 15, 2007

NVIDIA drivers on Ubuntu 6.06

There's a great Installation Guide here for updating the drivers for my NVIDIA GeForce FX Go 5200 Graphics card on my HP zd7140us laptop.

Problems I had before installed the NVIDIA driver.

  • Poor graphics performance. For example, screensavers were very slow.

  • Odd horizontal lines when watching a DVD in Fullscreen.



Thanks, tseliot and the Ubuntu Document Storage Facility for posting the guide.

Monday, January 8, 2007

Slow Wireless connection. IPv6 not supported on the router.

Just recently I came across an issue which took me some time to resolve (no pun intended). The problem was that when I connected to a particular WEP enabled access point (Netopia 3347NWG-EIR), connectivity to websites was very slow (about 30 seconds) using either Firefox or Lynx on my laptop running Ubuntu 6.06. This happened for any website. However, once a page was loaded from particular domain, subsequent connections to that domain were fine until the browser was closed or ignored for a few minutes.

Appearing to be a DNS issue, I tried pinging a few different domain names and the names resolved quickly and the ping times were fine. I also tried dig and response was good.

So then I thought the problem was with WEP as I had never experienced this with non-WEP APs. I disabled WEP on the AP and couldn't connect at all. (I'm not sure why this happened. it could be related to IPv6 and will test when I get a chance). I re-enabled WEP and captured some packets which revealed the problem.

When trying to browse to a domain, Firefox was trying to resolve the AAAA (IPv6) record for the domain name. There was a request every 5 seconds, and the router would drop each of the packets. After 6 attempt, Firefox would request the A (IPv4) record, which would resolve with no problem and the page would quickly load.

So, the problem was clearly with the router dropping DNS AAAA requests. I tried to upgrade the firmware, but it's already on the latest version. The best solution to this issue is for Netopia to fix this. I've sent them an email, however, I don't want to wait.

Workaround for the "IPv6 slow down" due to incapable router.

How to disable IPv6 in FireFox

First to confirm that domain name resolution of IPv6 address is causing the slowdown you can disable IPv6 in FireFox
  1. In the address bar type "about:config"
  2. In the Filter Field type "ipv6"
  3. Click on "network.dns.disableIPv6" changing the value from "false" to "true".
Browsing should now be dramatically better.

This fixes the issue for Firefox but other applications are still vulnerable.

How to disable IPv6 for Ubuntu 6.06
  1. Create the file /etc/modprobe.d/blacklist-ipv6
  2. Editing /etc/modprobe.d/blacklist-ipv6, add the line:
    blacklist ipv6
  3. Reboot
IPv6 should now be disabled, and browsing quicker.

No word from Netopia yet. Until I hear from them, this seems like the best solution.

Tuesday, December 19, 2006

Synaptics Touchpad on Ubuntu 6.06 - QSynaptics

After installing Ubuntu 6.06, the Synaptics touchpad on my HP zd7140us laptop seemed to be working perfectly. However, after a short while, I noticed some annoyingly odd behaviour. Usually when I was typing text in text box, The cursor would jump from where I was currently typing to where the mouse pointer was located (as if I had clicked the left mouse button). Not cool. Also, I wanted to take advantage of the touchpad's other features. After a brief web search, I found QSynaptics.

This is all I had to do

1. Install QSynaptics
sudo apt-get install qsynaptics


2. Edit the X11 config file to enable synclient
sudo vi /etc/X11/xorg.conf


Add the line "Option SHMConfig on"

Section "InputDevice"
Identifier "Synaptics Touchpad"
Driver "synaptics"
Option "SendCoreEvents" "true"
Option "Device" "/dev/psaux"
Option "Protocol" "auto-dev"
Option "HorizScrollDelta" "0"
Option "SHMConfig" "on"
EndSection


3. Restart X11, in a console type
sudo /etc/init.d/gdm stop

Log back in to the console and type
sudo /etc/init.d/gdm start


4. Fire up qsynaptics. Alt-f2, qsynaptics

Any settings changes are saved to ~/.qynaptics. In order to restrore these settings when gnome loads, add the command
qsynaptics -r
to System > Preference > Sessions > Startup Programs

Now whenever you logout or restart your QSynaptics settings will reload. The last step is to add a shortcut in the System > Preferences Menu so you can find QSynaptics months from now. To do this, right click on the System menu and select Edit Menus

Thursday, June 8, 2006

Testing blogger

This is a test of the blogger software system. Hosted remotely on the RideYourBike.org server.