[SOLVED] extremely slow /dev/urandom from live cd

Im getting a pc ready for arch. Im running dd if=/dev/urandom of=/dev/sda bs=1M to fill the drive with random data for and encrypted setup.
I'm 4 hours into a 80gb drive with no end in sight. Its a newer pc, 2.8 dual cores and sata whatnots.
Is there entropy issues using the live cd? Ive read that cat could be faster but i dont know where the bottleneck is. Has anyone else had this experience?
EDIT:nvm, i installed and used dcfldd from the live cd for a progress report and its running alot faster. Maybe its a bug in dd on the live cd.
Last edited by zippy (2010-01-11 05:53:31)

I am using urandom as i said above and the title states.
Anyways, dcfldd is averaging 8mb per second. Im doing a 200gb now and its gonna take around 10 hours. I guess if i just let dd finish on my first post it would have been done soon, i just didnt have a progress report to gauge the speed. Apparently this is just how long it takes, i was just disappointed with the results.
Last edited by zippy (2010-01-11 17:42:25)

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mfirst wrote:
I have tried to set up my external 1TB seagate USB drive to my AE for wireless network storage (only 1 computer on network, but I also have an AppleTV). If the drive is connected directly to my MB the transfer speeds are fine, but when I try to go wireless the speeds are extremely slow
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Hello Mary,
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[SOLVED] Extremely slow internet

Hello.
I'm having a problem with really slow internet on Arch, but it's working really fast and smooth on Windows. This started to happen once i moved my old HDD to a new built computer, so i wouldn't have to reformat etc. (Now i have reformatted and also tried Debian, same thing there and now)
Any ideas?
rc.conf
# /etc/rc.conf - Main Configuration for Arch Linux
# LOCALIZATION
# LOCALE: available languages can be listed with the 'locale -a' command
# DAEMON_LOCALE: If set to 'yes', use $LOCALE as the locale during daemon
# startup and during the boot process. If set to 'no', the C locale is used.
# HARDWARECLOCK: set to "UTC" or "localtime", any other value will result
# in the hardware clock being left untouched (useful for virtualization)
# Note: Using "localtime" is discouraged.
# TIMEZONE: timezones are found in /usr/share/zoneinfo
# KEYMAP: keymaps are found in /usr/share/kbd/keymaps
# CONSOLEFONT: found in /usr/share/kbd/consolefonts (only needed for non-US)
# CONSOLEMAP: found in /usr/share/kbd/consoletrans
# USECOLOR: use ANSI color sequences in startup messages
# VERBOSE: Verbose level (from 1 to 8). man 3 syslog for level info
LOCALE="sv_SE.UTF-8"
DAEMON_LOCALE="no"
HARDWARECLOCK="localtime"
TIMEZONE="Europe/Stockholm"
KEYMAP="se-lat6"
CONSOLEFONT=
CONSOLEMAP=
USECOLOR="yes"
VERBOSE="3"
# HARDWARE
# MOD_AUTOLOAD: Allow autoloading of modules at boot and when needed
# MODULES: Modules to load at boot-up. Prefix with a ! to blacklist.
MOD_AUTOLOAD="yes"
MODULES=()
# Udev settle timeout (default to 30)
UDEV_TIMEOUT=30
# Scan for FakeRAID (dmraid) Volumes at startup
USEDMRAID="no"
# Scan for BTRFS volumes at startup
USEBTRFS="no"
# Scan for LVM volume groups at startup, required if you use LVM
USELVM="no"
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HOSTNAME="Cerberus"
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# - interface: name of device (required)
# - address: IP address (leave blank for DHCP)
# - netmask: subnet mask (ignored for DHCP)
# - gateway: default route (ignored for DHCP)
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# interface=eth0
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# interface=eth0
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# gateway=
interface=eth0
address=
netmask=
gateway=
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NETWORK_PERSIST="no"
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# need more advanced network features than the simple network service
# supports, such as multiple network configurations (ie, laptop users)
# - set to 'menu' to present a menu during boot-up (dialog package required)
# - prefix an entry with a ! to disable it
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#NETWORKS=(main)
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DAEMONS=(hwclock syslog-ng @network dbus netfs @rtorrent @crond alsa)
resolv.conf
nameserver 8.8.8.8
nameserver 8.8.4.4
hosts
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#<ip-address> <hostname.domain.org> <hostname>
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This is my dmesg:
http://pastie.org/2359904
errors.log
http://pastie.org/2359912
messages.log
http://pastebin.com/EUUhWayF
lspci -vv
http://pastie.org/2359917
ICSI Netalyzr
http://n3.netalyzr.icsi.berkeley.edu/su … -44fb-bd2d
Also tried using the DNS assigned to me by the ISP, no difference in speed.
Everything is correct as far as i can see
Last edited by Median (2011-08-13 14:11:34)

Aug 12 09:06:44 localhost kernel: [ 2119.377962] BUG: scheduling while atomic: X/13058/0x00000002
Aug 12 09:06:44 localhost kernel: [ 2119.378345] BUG: scheduling while atomic: X/13058/0x00000002
Aug 12 09:06:44 localhost kernel: [ 2119.378752] BUG: scheduling while atomic: X/13058/0x00000002
Dunno how much of an adverse effect *that* bug is having.
Aug 12 09:06:44 localhost kernel: [ 2119.378069] [<ffffffff813e9ed3>] __schedule_bug+0x5f/0x64
Aug 12 09:06:44 localhost kernel: [ 2119.378071] [<ffffffff813f0381>] schedule+0x831/0x9f0
Aug 12 09:06:44 localhost kernel: [ 2119.378095] [<ffffffffa02262e2>] ? firegl_trace+0x72/0x1e0 [fglrx]
Aug 12 09:06:44 localhost kernel: [ 2119.378098] [<ffffffff81045128>] ? __wake_up_common+0x58/0x90
Aug 12 09:06:44 localhost kernel: [ 2119.378116] [<ffffffffa02262e2>] ? firegl_trace+0x72/0x1e0 [fglrx]
Aug 12 09:06:44 localhost kernel: [ 2119.378118] [<ffffffff81046e13>] ? __wake_up+0x53/0x70
Aug 12 09:06:44 localhost kernel: [ 2119.378121] [<ffffffff8107f470>] ? prepare_to_wait+0x60/0x90
And that. You need to investigate these. Hopefully it's just one bug.

[SOLVED] Extremely Slow Wireless on Macbook Pro

SOLVED (Hopefully forever.)
Problem: The b43 and bcma kernel modules do not get along. You'd never know this with kernels up to 3.2.14, as bcma is not automatically loaded and it is not needed with b43. For recent kernels however, it is. It in turn destroys wireless internet speeds.
Solution: The broadcom-wl driver. It used to be portrayed in the Wiki as being something to avoid, but that has changed recently. It offers a better connection and much faster speeds, but can take a little bit more effort to set up. Just a bit.
Broadcom-wl Installation and Setup
1. Install broadcom-wl from the AUR.
2. Uninstall b43-firmware if it's installed.
3. Note what broadcom-wl has put into /etc/modprobe.d. These blacklistings will ensure no interference from other kernel modules. Also make sure you're not blacklisting `wl` or its friends, if you have been.
4. Don't reboot yet. Go to /sys/class/net and use the command:
udevadm info -a -p /sys/class/net/<yourdevice> | grep address | tr [A-Z] [a-z]
(of course replacing <yourdevice> with the names of your interfaces - probably eth0 and wlan0) This will tell you their MAC addresses. Write these down!
5. Go to /etc/udev/rules.d/ and create a file called 10-network.rules. We are going to make custom udev rules so that our interfaces are matched to their proper names at boot time. Here is a template:
SUBSYSTEM=="net", ATTR{address}=="aa:bb:cc:dd:ee:ff", NAME="net0"
SUBSYSTEM=="net", ATTR{address}=="ff:ee:dd:cc:bb:aa", NAME="wifi0"
Enter the MAC addresses (in lower case!) and give them names in the NAME field. Apparently it's a good idea to choose new interface names, different from the default eth0 and wlan0. My file looks like this:
SUBSYSTEM=="net", ATTR{address}=="58:b0:35:f6:45:0c", NAME="wired0"
SUBSYSTEM=="net", ATTR{address}=="f8:1e:df:ea:99:17", NAME="wifi0"
6. Go change ANYTHING that had references to the old interface names. I had to change my rc.conf, as well as settings in my wicd preferences so that it knows what names to look for.
7. Rebuild your kernel image with
sudo mkinitcpio -p linux
(you might not have to do this, but it couldn't hurt.)
8. Save this page. Yes, the html. This is so that you still know what to do in case of problems and no internet.
9. Reboot and enjoy your restored wireless internet.
---- ORIGINAL POST ----
Seems everybody and their grandmothers are having internet problems since 3.3.
On a Macbook Pro, kernel 3.3.2-1.
Here is my problem: http://i.imgur.com/AcqLM.jpg
I made that image before checking the forums, but now that I've looked around I suspect the kernel.
Put up with it until 3.3.3? Or regress?
Last edited by fosskers (2012-08-31 13:00:28)

@fosskers:
Sry, I just told KDE to disable it
@all:
/proc/net/wireless looks pretty bad:
Inter-| sta-| Quality | Discarded packets | Missed | WE
face | tus | link level noise | nwid crypt frag retry misc | beacon | 22
wlan0: 0000 70. -38. -256 0 0 0 514 2 0
After measuring this, I just got kicked out (again):
[ 1072.839997] ieee80211 phy0: wlan0: No probe response from AP 4c:e6:76:22:4f:33 after 500ms, disconnecting.
Now it even refuses to reconnect. This is a full "enable wireless - try connect - fail"-cycle:
[ 1698.359901] b43-phy0: Loading firmware version 666.2 (2011-02-23 01:15:07)
[ 1698.560136] ADDRCONF(NETDEV_UP): wlan0: link is not ready
[ 1721.394168] wlan0: authenticate with 4c:e6:76:22:4f:33
[ 1721.420074] wlan0: send auth to 4c:e6:76:22:4f:33 (try 1/3)
[ 1721.422002] wlan0: authenticated
[ 1721.423411] wlan0: associate with 4c:e6:76:22:4f:33 (try 1/3)
[ 1721.426883] wlan0: RX AssocResp from 4c:e6:76:22:4f:33 (capab=0x411 status=0 aid=1)
[ 1721.426886] wlan0: associated
[ 1721.428216] ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[ 1729.470178] wlan0: deauthenticated from 4c:e6:76:22:4f:33 (Reason: 2)
[ 1729.473907] cfg80211: Calling CRDA to update world regulatory domain [...]
[ 1730.674444] wlan0: authenticate with 4c:e6:76:22:4f:33
[ 1730.700199] wlan0: send auth to 4c:e6:76:22:4f:33 (try 1/3)
[ 1730.702446] wlan0: authenticated
[ 1730.703423] wlan0: associate with 4c:e6:76:22:4f:33 (try 1/3)
[ 1730.706988] wlan0: RX AssocResp from 4c:e6:76:22:4f:33 (capab=0x411 status=0 aid=1)
[ 1730.706997] wlan0: associated
[ 1738.740963] wlan0: deauthenticated from 4c:e6:76:22:4f:33 (Reason: 2)
[ 1738.748937] cfg80211: Calling CRDA to update world regulatory domain [...]
[ 1739.954181] wlan0: authenticate with 4c:e6:76:22:4f:33
[ 1739.980222] wlan0: send auth to 4c:e6:76:22:4f:33 (try 1/3)
[ 1739.982773] wlan0: authenticated
[ 1739.983401] wlan0: associate with 4c:e6:76:22:4f:33 (try 1/3)
[ 1739.987077] wlan0: RX AssocResp from 4c:e6:76:22:4f:33 (capab=0x411 status=0 aid=1)
[ 1739.987086] wlan0: associated
[ 1746.001760] wlan0: deauthenticating from 4c:e6:76:22:4f:33 by local choice (reason=3)
[ 1746.015596] cfg80211: Calling CRDA to update world regulatory domain [...]
Sometimes it does not find any networks at all (iwlist wlan0 scan shows nothing)
Again, everything was fine with kernel < 3.4. (downgrading helps).
Maybe I should start compiling some kernels myself and search the regression with a bisection...

Again, extremely slow movie downloads from itunes store

I'm on broadstripe cable and I'm speed testing at about 5.6-6.0 for downloads.... internet pages load fine, etc. When renting a movie on itunes through appleTV I have to wait hours for the movie to download so i can watch it.
Any ideas? Thanks!

I usually test around 5 as well, but sure enough I noticed a HUGE slowdown in my internet speed after an evening of downloading rentals last week. The slow speed (less than 1.5!) continued on after that and it took a tech support call to my ISP to get it "fixed".
My guess - Qwest is "throttling" video-intensive internet use. Torrent or not.
I believe Qwest automatically throttles any encrypted downloads but I don't know if AppleTV downloads are encrypted?
My speed is back up around 5 again, and I will keep a close eye on it next time I rent.

CS5 Extremely Slow to Open, Save and Print

We have recently installed InDesign CS5. We are experiencing extreme slowness when open, saving and printing documents. We have installed on Windows XP Service Pack 3. I have upgrade to 7.0.3 to no avail. Has anyone else experienced this? If so, were you able to resolve it?

pooh071567 wrote:
I can create and save new CS5 files fine both to the desktop and the network. I tried copying our existing files to the desktop to see if there was a network issue. It is also extremely slow to open from the desktop. I'm beginning to wonder if it is our documents. They were created in CS3. I tested one that was 2 pages of text with a few graphics. It took a considerable amout of time to open. I made some edits to it and saved it to the desktop. I would have thought that saving it in the new CS5 format would have improved the slowness. It did not.
I was on a support call with Adobe yesterday for 2 1/2 hours. To say it was extremely frustrating is an understatement. They have asked me to re-download the install, uninstall and reinstall. I did not re-download, but did uninstall and reinstall from the EXE we have. Slowness is still an issue. I'm inquiring regarding our antivirus, however, I don't think that is the issue. We were able to open files in CS3 just fine. It seems to be since the upgrade to CS5 that we are having issues.
Whenever you contact anybody's tech support:
* Get the name of the tech, and any other identifying info
* Get a case number
* Explain your question/problem briefly; begin by saying, "I'm going to explain my problem briefly. Before we spend lots of time on it, I'll ask you if you have expertise in this particular area. I don't mean to be rude, but if you don't have sufficient expertise here, we'll both waste our time. If this isn't OK with you, I understand; we all have strong and less-strong areas. If you don't have the expertise, please give me the name of someone who has the the greatest amount of the expertise needed to solve the problem, and then transfer me to that person. If you can't do this, please give me your supervisor or manager's name, and transfer me to that person. Would you like me to state my problem briefly, now, so that we can go ahead?"
* If you have the slightest inkling that you're being told to do wasteful things like re-download, uninstall and reinstall, ask the tech, "Is this a known fix for my problem? If it's not, why are you asking me to do this?" (Some techs suggest these steps to get you off the line and move on to another call, either because their call clearance rate is slipping, and that's how many are paid. Others suggest them because they don't have the expertise to solve the problem.)
* If you're transferred to a manager or supervisor, summarize why you asked for him or her. Then, ask the manager to transfer you to the highest-skilled person for the problem you'll now explain briefly. If the manager/supervisor balks, ask for the highest-level person in the department, or the division. IOW, ESCALATE (use that word, when asking to change people.)
It's not the customer's job to teach customer service folks to serve customers, but we're the best ones to teach them now NOT to do it.
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Seriously,
HTH
Regards,
Peter
Peter Gold
KnowHow ProServices

Windows 7 Ultimate (64-Bit) fresh install, only WLAN and video driver installed but EXTREMELY slow internet connection...

I recently checked my internet connection on my Asus G53SW and found that it was extremely slow on both the LAN and WLAN connections. I checked with a different laptop (old HP Pavilion) and I get a steady 74mbps+ connection using the same LAN cable and
also with the WLAN connection. My ISP has checked their side and everything is fine.
To try and resolve the issue I tried uninstalling, disabling and tweaking various software and even tried safe mode with networking, all to no avail. I then decided to do a complete fresh install this afternoon. I have installed Windows 7 Ultimate (64 bit)
successfully onto my SSD and everything went smoothly. I have now only installed Nvidia video drivers and the (only) WLAN driver from the Asus support site.
My WLAN connection remains incredibly slow (amost half what it is on the HP and my MacBook Pro). Clearly this is an issue with either the Asus laptop or Windows but I don't know how to proceed in order to eliminate which it could be other than to try a different
o/s to W7-Ult.
Can anyone help who knows more about this than me? Perhaps someone who has had a similar or the same problem because this is giving me a severe headache!
Thanks in advance to all and for any advice.
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Thank you for responding. As I stated in my original post the reason I went through this process was because of an extremely slow internet connection from both the WLAN and LAN connections on my G53SW. At that time I had all of the correct drivers on the
machine. Whilst I would agree that with the machine only having a video and WLAN driver it may well not be working 'optimally', the rationale for doing this was to get the machine working with the minimum of processes to show that it was not anti-virsu software,
Steam or the like causing interference.
I have changed out both of the HDDs this evening (a primary SSD and a secondary 1Tb HDD) for a clean hybrid 1Tb Seagate drive. Once I have installed all of the Asus drivers (and nothing else) I will try the speed test again and report back.
I can now report that with a fresh install of Windows 7 Ultimate SP1 and ONLY Asus drivers as supplied the issue remains. On a connection where I should see around 75mbps I am actually getting around 18mbps, sometimes considerably slower. This only affects
my Asus machine.
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tabId, isTop, url);} }; function Nav(BrowserID, TabID, isTop, isBool, url) { var object = document.getElementById("cosymantecnisbfw"); if(null != object) object.Nav(BrowserID, TabID, isTop, isBool, url); }; function NavigateComplete(BrowserID, TabID,
isTop, url) { var object = document.getElementById("cosymantecnisbfw"); if(null != object) object.NavigateComplete(BrowserID, TabID, isTop, url); } function Submit(browserID, tabID, target, url) { var object = document.getElementById("cosymantecnisbfw");
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[SOLVED] extremely slow /dev/urandom from live cd

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