Category: linux
11/30/11 12:17 - ID#55623
Fedora 16 Wireless Connectivity Problems
In Fedora 16, I have an additional error that shows up in the boot sequence.
[drm:ironlake_update_pch_refclk] *ERROR* enabling SSC on PCH
This is a Toshiba Satellite P750 laptop running an intel core i7. The laptop boots okay after these couple errors. I don't know what it is about. A little googling shows that Linus Torvalds has encountered this error too, on his Lenovo machine.
This has been fixed as of 14th Dec 2011. I guess things that Linus notices and Google pluses about get more attention than just random users whining about bigger problems.
Nevermind the premature edit. It's back.
But that error is very trivial and the least of my concerns. My primary source of irritation with Fedora 16 is its appalling network connectivity and performance. My first impressions of Fedora 16 were somewhat mixed. The install went very smoothly. They have finally incorporated my wireless driver into the default package. So wireless is recognized right away.
However, the performance of the wireless driver is extremely poor. It is almost impossible to reliably connect with open wifi at work and other hotspots with the new Fedora 16. This is the speed I am getting from the T1 connection at work:
While my mobile phone with android was able to connect with every random wireless hotspot all across NYC, the stupid Fedora 16 laptop could not connect to ANY of them. Wireless performance has always been pretty subpar with Fedora 15. Now, with Fedora 16, it is just abysmally horrid. It only connects if the router is like 2 metres away from the laptop or has very strong signals. This is obviously not practical anywhere but home. So essentially, switching to Fedora 16 has converted my laptop into a home-bound desktop.
I cannot possibly be impressed with anything that constantly struggles to connect with wireless access points ALL the time. It's so bad, it's ridiculous.
Specifically, these modules and drivers:
- Kernel driver in use: rtl8192ce
- Kernel modules: rtl8192ce
Output of dmesg | grep firmware
[ 23.160984] NetworkManager[1048]: monitoring kernel firmware directory '/lib/firmware'.
[ 23.160992] NetworkManager[1048]: NetworkManager[1048]: monitoring kernel firmware directory '/lib/firmware'.
[ 23.309242] rtl8192c_common: Loading firmware file rtlwifi/rtl8192cfw.bin
I just found that I am not the only one whining.
There are other people out there who are having similar network problems with this wretched distribution. I cannot blame it on my linux "newbieness-I-probably-don't-know-what-I-am-doing" this time around.
Fedora 16. You really do SUCK. Big time.
EDIT:
Some cool commands for investigating what exactly is going on here:
sudo cat /var/log/* | grep -e rtl -e firmware -e wlan -e wpa -e etwork | tail -n55
{gives you all the network related "happenings" as recorded by the system logs}
nm-tool
{gives you a list of networks that your computer can see}
iwconfig
{gives you the configuration of the wireless you are currently connected with}
dmesg | grep rtl
{gives you this:}
[ 20.066460] rtl8192ce 0000:03:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17
[ 20.066469] rtl8192ce 0000:03:00.0: setting latency timer to 64
[ 20.084887] ieee80211 phy0: Selected rate control algorithm 'rtl_rc'
[ 20.085214] rtlwifi: wireless switch is on
[ 23.306151] NetworkManager[1048]: <info> (wlan0): new 802.11 WiFi device (driver: 'rtl8192ce' ifindex: 3)
[ 23.306168] NetworkManager[1048]: NetworkManager[1048]: <info> (wlan0): new 802.11 WiFi device (driver: 'rtl8192ce' ifindex: 3)
[ 23.309242] rtl8192c_common: Loading firmware file rtlwifi/rtl8192cfw.bin
[34868.924818] rtl8192c_common: Loading firmware file rtlwifi/rtl8192cfw.bin
==========
EDIT 2:
To anyone who is checking out this message, click the comment icon in the bottom and check out the comments too.
Permalink: Fedora_16_Wireless_Connectivity_Problems.html
Words: 646
Location: Buffalo, NY
Last Modified: 12/15/11 09:21
Category: linux
11/29/11 01:05 - ID#55621
Tale of two kernels?
rpm -qa | grep kernel
kernel-3.1.2-1.fc16.x86_64
kernel-3.1.0-7.fc16.x86_64
Anyone know about this?
Permalink: Tale_of_two_kernels_.html
Words: 23
Location: Buffalo, NY
Last Modified: 11/29/11 01:05
Category: tourism
11/29/11 12:49 - ID#55620
Cityscape
Permalink: Cityscape.html
Words: 5
Location: Buffalo, NY
Last Modified: 11/29/11 12:49
Category: music
11/29/11 12:13 - ID#55619
Retro Memories
Such a perfect song.
Permalink: Retro_Memories.html
Words: 29
Location: Buffalo, NY
Last Modified: 11/29/11 12:16
Category: the odes
11/28/11 10:27 - ID#55618
Quadratic Splines
But the price tag is $4000+. Apparently there will be a 10% discount after Christmas. Fat difference that would make to the price. That's costlier than a lower end used car. Maybe I should keep my eyes peeled for discarded table tops on pavements, paint them orange and black and hinge them together into a revolving set...
This post should really be categorized as Impracticality+++ in every way.
Permalink: Quadratic_Splines.html
Words: 119
Location: Buffalo, NY
Last Modified: 11/28/11 11:52
Category: eating in
11/27/11 10:49 - ID#55610
Sunday Breakfast
Permalink: Sunday_Breakfast.html
Words: 6
Location: Buffalo, NY
Last Modified: 11/27/11 10:50
Category: tourism
11/25/11 07:07 - ID#55599
Even the posters agree
Permalink: Even_the_posters_agree.html
Words: 6
Location: Buffalo, NY
Last Modified: 11/25/11 07:07
Category: tourism
11/24/11 10:07 - ID#55588
Murderous thoughts in Albany.
The cigarette smoke is seeping through the insulation of the windows on the train and making me think of those precise adjectives.
Why doesn't the train move and leave these nutcases behind already??
The station reminds me of this completely delusional storyline in that crazy series, "Spooks" (known here as MI-5) where everyone (who didn't get themselves fried in a kitchen fryer) and their aunt spent most of the season dropping references to something called "Albany". I think I never got to know what it actually was, probably because the plot was so convoluted, it made no sense... and of course I was watching in 15 minutes per weekend sections.
I give up on anything that gives me a logic nightmare when watched in 15 min sections every weekend (or sometimes fortnight). Either that or it should meld gracefully into whatever other 15 minute-section-of-something I am watching.
Permalink: Murderous_thoughts_in_Albany_.html
Words: 190
Location: Buffalo, NY
Last Modified: 11/24/11 10:37
Category: i-tech
11/24/11 09:19 - ID#55587
Arrgh. Slow is the Camera
It takes such an E.T.E.R.N.I.T.Y for the camera to fuss through and get ready to finally take shot. Fast moving targets are a complete impossibility.
For instance, I just saw the creepiest life-size nativity scene right in the middle of nowhere somewhere in the middle of NY state, intentionally placed (I am sure) to appeal to the Godless heathen who take the train.
Well, this Godless heathen was unable to take a shot and share the creepinessl! No thanks to slow slow slow camera technology from Nexus One.
Arrrrgh.
Permalink: Arrgh_Slow_is_the_Camera.html
Words: 149
Location: Buffalo, NY
Last Modified: 11/24/11 09:19
11/24/11 08:37 - ID#55586
One more reason to take the train
Permalink: One_more_reason_to_take_the_train.html
Words: 14
Location: Buffalo, NY
Last Modified: 11/24/11 08:49
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The updates did help with the crashes a bit but there has been no improvement on the wireless front thus far. Worse is the attitude of several linux users who just don't want to even admit that wireless support is so subpar.
I honestly want to just wrings my hands and pull out my hair some days. My basic reason for sticking with Fedora is simple. The Debian implementation for R Statistical software is faulty and I am not expert enough to build R for debian on my own. So I migrated to fedora. If you don't have any such issues, have you tried, say Crunchbang Linux or even vanilla Debian with your system? I remember that some of the distributions, for example, WattOS were better with their wireless access compared to utterly disappointing Fedora 16 version.
"I am connected to another network now and I appear to not be having issues. I think my wifi card has a problem with recognizing that all ECE networks are the same, so maybe it keeps switching between them."
Jetblue and Roswell all have multiple access points and have weak signals on many access points. The wireless does fine with my network at home. Maybe the multiple access point issue has not been addressed in the driver. You have the exact same scenario as mine in that Ubuntu thread: :::link::: The OP finally moved to windows which definitely has better wireless connectivity.
"Try to change the ESSID to a one without blanks"
Huh, what am I supposed to do, hack into a public network to change its ESSID?!
"You have many network's in your area and to make it worse many of them are named the same as the one you are connecting too and are on the same channel, all of that is a nightmare with network manager. "
Take my example. R won't play well with perl and latex in windows, so I move to debian. Debian-R won't sort things properly, so I move to fedora. fedora won't connect to networks well... Mac won't do ANY of these well. So there is simply no real alternative but to keep being discontented with the state of OS for my computing needs.
Arrgh. rant rant rant that's all I do. I feel like I am 90+ years old now.
Why should that result in a drastically different performance than just installing the driver by itself to a kernel that doesn't have the module? What changes during the process of building the kernel module? Am I making sense or is this a completely clueless question? Well, I know it's clueless, but what I want to know is what is actually happening during the integration process to mess it up?
I will try that and report back. :)
The sad truth is that for wireless in Linux yes I have done all that shit. And I've been doing wi-fi Linux since about 2002. Newish kernels and kernel modules can be problematic.
My advice is the same, find the kernel in Fedora that your wireless card liked and use it.
Some of the 3.0.x kernels in Debian won't even recognise my card. But Fedora does.
Good Luck.
Unfortunately, fedora is the best for my purposes too. The whole debian family has a compiled R source that refuses to sort things properly and it seriously affects my data analyses workflow. It's still a very nice distro - much better than many others but wireless connectivity is very important in a laptop for me. That is the basic reason for having a laptop; to be able to take it places and have your work mobile. I am just terribly disappointed that it can't do this simple job of connecting to networks reliably. I don't have any other options in terms of distros. Fedora is the best for my work. I think I am going back to F15 today.
Everything else feels pretty much the same in F16 as F15. There are some cosmetic differences in Gnome 3 shell. The terminal can be made transparent again. But these hardly count as "improvements" in the face of the gaping network bug. If you are using F16 for a desktop with a wired connection, I am sure you will find it nice than F15. I say, go for it.
Ironically enough, I was planning to install Fedora 16 on my Zareason box tonight after testing the live image for a while. Afer playing with sundry distros on the box, I have discovered that Fedora is the bestest distro for me. With minimal tweaking, it provides me with just about everything I want in a Linux distro other than a pre-configured E17 environment.
I'll report the results.