Low usb performance on KT4V

Hi,
I upgraded from KT266Pro2A to KT4V. On my previous system I was able to achieve 25fps capture with my webcam (usb 1.1). Now I can reach at most 15fps. Is that a driver issue or so? All the other settings are same with the old system.
KT4V
Duron 800@810MHz
256MB DDR 2100
Win 2K & Win 98
Via 4in1 4.43
BIOS rev 1.8
Thanks

Quote
Originally posted by jkesa
Run, yes, but at full speed? I heard usb 2.0 can be touchy, so if you can get the cables cheap enough (I get 2 USB 2.0 cables with 24kt gold contacts at Sams Club for $6.98 it might be worth a try.
My situation is: I have a webcam (FlyCam 300K) which has been bought before there were any USB2.0 capable mainboards available. I have been using a MSI KT266 Pro2-A board. The webcam were connected by using its std. cable (it is not a replaceable cable, just fixed). By using virtual dub I was able to capture 25fps @ 320x240 resolution (lower fps at higher resolutions due to the capability of the webcam). Then my mboard broke and I bought a KT4V. I am using both Win2k and 98se on my system. I have loaded all chipset and USB2.0 drivers (even though I will never need usb2.0 soon). All the other hardware and software except the motherboard itself are the same with the old system. No sub cables are used btw the camera and motherboard.
Now I could not get the point in using an extra usb2.0 rated cable. My webcam has nothing to do with usb2.0. Do you mean that Via's usb2.0 chipset offers low performance even on usb1.1 systems?
Thanks.

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Last edited by galiyosha (2007-11-11 21:34:17)

lilsirecho wrote:Can you change to a different usb controller? It may be defective.
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lilsirecho wrote:
Perhaps the current supplied by the usb controller is inadequate.
Perhaps a powered hub added if you have one will alleviate the problem....EDITED
It is an external HDD enclosure, so it is self-powered.
lilsirecho wrote:One last gasp...check /etc/mkinitcpio.conf for hooks "usb"...
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WRT160NL - Connection drops, Reboots, USB performance

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Hello,
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Get xorg-server and xf86-video-intel from testing. For more information consult this topic.

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Hi,
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Hmm, triple buffer doesn't seem to make a difference because enabling it was the last thing I tried, but no matter what I do, my FPS stays at ~750.....isn't that strange ? I know I've seen several posts here from Intel gma 950 owners that they get around ~1200 FPS.....
Although,
glxinfo | grep direct
does return
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Thanks for the response anyway....
EDIT: Just tried disabling triple buffer and the composite extension, and glxgears still returns the same result! I just don't get it
Last edited by moljac024 (2008-02-08 10:33:36)

Settings Suggestions (Low Light Performance)

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If money were no object, a 1Dx and a Canon EF 50mm f1. But seriously buying a 6D, or a brand-N, is not going to help.
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http://i.nokia.com/image/view/-/1824230/medRes/5/-/ApolloPureView-image2.jpg

@AlexOdin
I've attached a couple of stills comparing the N8's night mode and Lumia 920's night mode both without using flash. Both shots were taken with seconds of each other under the same low light conditions.
I'm quite impressed with the results of the 920.
Cheers.
Ray.
Attachments:
N8 without flash.jpg ‏202 KB
Lumia 920 without flash.jpg ‏217 KB

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I realize the Mac isn't as good of a gaming computer as a PC... I get that. But when a game is working fine one day and a year later is unplayable... GRRRR.
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Thanks but I read that in several places already.
I stated that I had this problem in Mavericks as well. Working on downloading the Mavericks installer and I'm going to try a wipe and install (of mavericks) to see if that fixes it.

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Really I have never heard anything alike before but
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After this, I installed CentOS 5.0 and tested hdparm again:
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Then I Tested hdparm in Ubuntu 7.04 and in Fedora 7 and:
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Last edited by William Koch (2007-09-19 16:52:03)

cactus wrote:
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* READ_BUFFER command
* NOP cmd
* DOWNLOAD_MICROCODE
* Advanced Power Management feature set
* SET_MAX security extension
* 48-bit Address feature set
* Device Configuration Overlay feature set
* Mandatory FLUSH_CACHE
* FLUSH_CACHE_EXT
* SMART error logging
* SMART self-test
* General Purpose Logging feature set
* WRITE_{DMA|MULTIPLE}_FUA_EXT
* IDLE_IMMEDIATE with UNLOAD
* SATA-I signaling speed (1.5Gb/s)
* Native Command Queueing (NCQ)
* Host-initiated interface power management
* Phy event counters
DMA Setup Auto-Activate optimization
Device-initiated interface power management
* Software settings preservation
* SMART Command Transport (SCT) feature set
Security:
Master password revision code = 65534
supported
not enabled
not locked
frozen
not expired: security count
not supported: enhanced erase
46min for SECURITY ERASE UNIT.
Checksum: correct
hdparm -I /dev/sda in CentOS:
# hdparm -I /dev/sda
/dev/sda:
ATA device, with non-removable media
Model Number: TOSHIBA MK8037GSX
Serial Number: 37NHF8VJS
Firmware Revision: DL230M
Standards:
Supported: 7 6 5 4
Likely used: 7
Configuration:
Logical max current
cylinders 16383 16383
heads 16 16
sectors/track 63 63
CHS current addressable sectors: 16514064
LBA user addressable sectors: 156301488
LBA48 user addressable sectors: 156301488
device size with M = 1024*1024: 76319 MBytes
device size with M = 1000*1000: 80026 MBytes (80 GB)
Capabilities:
LBA, IORDY(can be disabled)
Queue depth: 32
Standby timer values: spec'd by Standard, no device specific minimum
R/W multiple sector transfer: Max = 16 Current = 16
Advanced power management level: unknown setting (0x0080)
DMA: sdma0 sdma1 sdma2 mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 *udma5
Cycle time: min=120ns recommended=120ns
PIO: pio0 pio1 pio2 pio3 pio4
Cycle time: no flow control=120ns IORDY flow control=120ns
Commands/features:
Enabled Supported:
* SMART feature set
Security Mode feature set
* Power Management feature set
* Write cache
* Look-ahead
* Host Protected Area feature set
* WRITE_BUFFER command
* READ_BUFFER command
* NOP cmd
* DOWNLOAD_MICROCODE
* Advanced Power Management feature set
* SET_MAX security extension
* 48-bit Address feature set
* Device Configuration Overlay feature set
* Mandatory FLUSH_CACHE
* FLUSH_CACHE_EXT
* SMART error logging
* SMART self-test
* General Purpose Logging feature set
* WRITE_{DMA|MULTIPLE}_FUA_EXT
* IDLE_IMMEDIATE with UNLOAD
* SATA-I signaling speed ( 1.5Gb/s)
* Native Command Queueing (NCQ)
* Host-initiated interface power management
* Phy event counters
DMA Setup Auto-Activate optimization
Device-initiated interface power management
* Software settings preservation
Security:
Master password revision code = 65534
supported
not enabled
not locked
frozen
not expired: security count
not supported: enhanced erase
46min for SECURITY ERASE UNIT.
Checksum: correct
hdparm -tT /dev/sda in ArchLinux:
/dev/sda:
Timing cached reads: 680 MB in 2.00 seconds = 340.13 MB/sec
Timing buffered disk reads: 130 MB in 3.04 seconds = 42.74 MB/sec
hdparm -tT /dev/sda in CentOS:
/dev/sda:
Timing cached reads: 1632 MB in 2.00 seconds = 816.36 MB/sec
Timing buffered disk reads: 130 MB in 3.03 seconds = 42.85 MB/sec
Could it be some new driver, or something that has changed recently, CentOS is RHEL based, it uses older programs/drivers/kernel.
Thank you!
Last edited by William Koch (2007-09-19 21:09:01)

Low usb performance on KT4V

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