Re: [Linux-usb-users] Power from USB ports

2006-01-25 Thread Alan Stern
On Wed, 25 Jan 2006, Z F wrote: > Hello Alan, > > I am ready to believe that this is a power problem. But this > does not happen from windows on the same configuration hardware > configuration. If you can find out why, I'd really like to know! :-) > recently, you mentioned this patch. Is it wo

Re: [Linux-usb-users] Power from USB ports

2006-01-25 Thread Z F
> This could very well be a power problem. The Genesys chip dropped > its > connection at the time of the reset; I don't know what causes that > sort of > thing to happen. > > Alan Stern Hello Alan, I am ready to believe that this is a power problem. But this does not happen from windows on t

Re: [Linux-usb-users] Power from USB ports

2006-01-25 Thread Alan Stern
On Wed, 25 Jan 2006, Z F wrote: > Hello Alan, > > The problem is that after long data writes to the drive, it > "disconnects". > I suspect that Genesys chip set draws too much power from the USB host > controller, but can not be sure since I do not know how to check that. > > I am using kernel 2

Re: [Linux-usb-users] Power from USB ports

2006-01-18 Thread Alan Stern
On Wed, 18 Jan 2006, Z F wrote: > The symptoms of the problem are: After long writes to the USB drive, > an I/O error occures. Drive disappears and has to be both unplugged > from power and from USB to reset. THis happens if USB2 module is > loaded. > If it is not loaded, the drive works perfectly

Re: [Linux-usb-users] Power from USB ports

2006-01-18 Thread Z F
Hello Alan > Could be. Or maybe your earlier problems were caused by lack of > power and > the newer problems are caused by something else. Yes, you could be right. But let us assume there is only one problem at a time :-) > > By the way, the drive has Genesys logic IDE-USB controller, and as

Re: [Linux-usb-users] Power from USB ports

2006-01-17 Thread Alan Stern
On Mon, 16 Jan 2006, Z F wrote: > Interestingly enough, the drive started to work perfectly in USB1.1 > mode. > In USB 2.0 mode, it still crashes on large copies, but now I can copy > about 1G file (compared to 100M before). From windows, on the same > system, the drive works. > This exact same d

Re: [Linux-usb-users] Power from USB ports

2006-01-16 Thread Xiaofan Chen
On 1/17/06, Z F <[EMAIL PROTECTED]> wrote: > After that, and searching on the web, I saw reports that connecting a > drive via powered USB hub helps. What it told me is that powered hub > supplies more power than the host controller. Since I do not have a hub, > but the PCI card had this power con

Re: [Linux-usb-users] Power from USB ports

2006-01-16 Thread Z F
Dear Alan, I would like to apologize if I insulted you or anybody by saing "Linux has a problem". I only meant to say that something strange is happening. I do not consider myself an expert on USB, I just have general knowledge of electronics and logic. I also said that it _appears_ to be a power

Re: [Linux-usb-users] Power from USB ports

2006-01-16 Thread Alan Stern
On Mon, 16 Jan 2006, Warren wrote: > Looks better when I re-read it in mono-space - I guess the 100mA MxPwr > entry might have something to do with it. Is there any way I can tell > the USB subsystem to increase that when it sees this device? No. In fact, the USB subsystem does not _decrease_

Re: [Linux-usb-users] Power from USB ports

2006-01-16 Thread Warren
Looks better when I re-read it in mono-space - I guess the 100mA MxPwr entry might have something to do with it. Is there any way I can tell the USB subsystem to increase that when it sees this device? W Warren wrote: When I plug it in, dmesg shows: usb 3-2: new full speed USB device using a

Re: [Linux-usb-users] Power from USB ports

2006-01-16 Thread Warren
When I plug it in, dmesg shows: usb 3-2: new full speed USB device using address 5 in /proc/bus/usb/devices it lists as: T: Bus=03 Lev=01 Prnt=01 Port=01 Cnt=02 Dev#= 5 Spd=12 MxCh= 0 D: Ver= 1.10 Cls=ff(vend.) Sub=ff Prot=ff MxPS=64 #Cfgs= 1 P: Vendor=0fca ProdID=0001 Rev= 1.04 S: Manufac

Re: [Linux-usb-users] Power from USB ports

2006-01-16 Thread Alan Stern
On Mon, 16 Jan 2006, Z F wrote: > Hello everybody, > > I have a similar problem with an external drive. > The drive gets its main power via a power supply, but unfortunately > the usb controller on the external drive gets its power via USB. > I have a dual boot system and the drive works fine fro

Re: [Linux-usb-users] Power from USB ports

2006-01-16 Thread Z F
Hello everybody, I have a similar problem with an external drive. The drive gets its main power via a power supply, but unfortunately the usb controller on the external drive gets its power via USB. I have a dual boot system and the drive works fine from windows, but form linux, it does not get en

Re: [Linux-usb-users] Power from USB ports

2006-01-16 Thread Alan Stern
On Mon, 16 Jan 2006, Warren wrote: > Then what would you suggest? I have no idea - I am not a hardware guy. > The symptoms are obvious and easily reproducible. The charging works > every time in Windows and fails every time in Linux. I have no suggestions. Maybe Dave can come up with someth

Re: [Linux-usb-users] Power from USB ports

2006-01-15 Thread Alan Stern
On Sat, 14 Jan 2006, Warren wrote: > It is not an overcurrent condition. In 2 cases the machines are > dual-boot. In both cases, EVERY time the machines are booted into > Windows the BlackBerry and ipod charge just fine and EVERY time they are > booted into Linux they do not. It definitely i

Re: [Linux-usb-users] Power from USB ports

2006-01-14 Thread Alan Stern
On Fri, 13 Jan 2006, Warren wrote: > Hi all, > > I am new here. I did a search through the archives (and google) and > could not find anything about this. I have several machines: generic > PCs, Dell machines and a few Laptops. All of which when running Windows > will charge my BlackBerry 7

[Linux-usb-users] Power from USB ports

2006-01-13 Thread Warren
Hi all, I am new here. I did a search through the archives (and google) and could not find anything about this. I have several machines: generic PCs, Dell machines and a few Laptops. All of which when running Windows will charge my BlackBerry 7100t with no problem from the USB port. A ful