Archive for the ‘Laptop’ Category

Orinoco_pci performance problems

Saturday, December 24th, 2005

Weird behavior of my Orinoco_pci wireless network interface. On my home 802.11b network, I get performance of about 600KB/s, instead of 1.1MB/s, which should be the approximate speed to expect to. Not only that, but browsing to external websites and the likes (I compare using wget), I get speeds of <7KB/s, and sometimes decreasing to a stall, on a 2Mb/s line. My desktop reaches speeds of >150KB/s, so I could either point at my wireless router/AP, or my wireless NIC. Using PCMCIA RTL8180 802.11b NIC, and using it with NDISwan drivers, I’ve got speeds of above 150KB/s, which points at my built-in Orinoco wireless interface.

I’ve tried downloading the newer orinoco driver, 0.15rc4 (instead of my existing 0.15rc2), and got similar results. I got stalled a bit later (testing with 18MB zip file), but it could be random point, just as well. Using the PCMCIA, it worked correctly *ALL* times. Pity. I will have to pay the “price”, regarding battery life, and extra accessories, regarding wireless for now. I might try this same test with some other router/AP sometime, when I get near one of those.

Kernel update – 2.6.14.2

Saturday, December 24th, 2005

My tiny laptop has worked rather well so far, but I’ve decided, due to some unexplained problems, to upgrade it to a newer version of kernel, aka 2.6.14.2.

Based on my own blog’s entry (what good are blogs if not to hold some long forgotten knowledge?), which can be found here, I’ve upgraded my kernel and used the following config file config-2.6.14.2.txt.

One thing which I’ve had to do, maybe due to some upgrade of mkinitrd tools, or the likes, and it took me one misserable hibernation and restore (or a failed restore) to discover was to add the line “echo >/proc/suspend2/do_resume” to /usr/share/initrd-tools/linuxrc (my exact file is linuxrc.txt), so that the system would actually restore from hibernation. Now it works correctly.

On another issue, I’ve been asked to advise during Oracle DB installation on Linux setup, with High Availability solution. Although, long time ago, I’ve installed Oracle on both Solaris and Windows (without fine-tuniing it, anyhow), I’ve started searching the net, and came to the following link. The documents linked there are worth their weight in gold and diamonds. I’ll be testing them in the next few days, for my own personal advantage, but I think it’s gonna succeed, and as it seems the place for such issues, I can only put my thumb up for such sites and information sources on the web. It reminds me of the good in it. I was very impressed.