Hi, I've just purchased 9.2 Pro - it's great, but I have serious problem with mobile USB memory devices. I've sent this post to installation support but it does not cover USB problems. I also reported it as technical feedback, but got no response. However, I found similar problem reports[3]. Registering newly connected device consume a lot of CPU - mostly by hwscan and kdeinit (up to 97%) and the whole system becomes unresponsive for about 10 s. The same for cleanup when device is disconnected. This wasn't happening in 9.0 - does it have something to do with this new, smart, automatic mounting/unmounting ? Is there a way to change that ? This is annoying, but not critical. The more serious is that the whole system usually freezes to death when I connect my 128 MB TwinMos pendrive[1] and perform some operations like file copying. Systems hangs irrecoverably - cold reset is the only solution. That's unbelievable, I've never seens anything like this in Linux before. The first crash happened when I moved mouse cursor over PDF file in Konqueror, so I thought it has something to do with previews in tooltips or other scanning file in background for some attributes. I disabled previews in tooltips in Konqueror settings, but it didn't help - systems still freezes suddenly, mostly during file copying. This happens almost always, but mainly for this pendrive - so far, I am trying to replicate this problem using Sony MS cards with Vantec card reader - so far it works without problems. Mobile disks have vfat filesystems (to be compatible with "leading" platform...) and there are messages in dmesg: FAT: utf8 is not a recommended IO charset for FAT filesystems, filesystem will be case sensitive! dmesg after device is connected: usb 1-2: new full speed USB device using address 4 usb 1-2: Product: USB Mobile Disk usb 1-2: Manufacturer: TTI-MSA usb 1-2: SerialNumber: AAAA000021 scsi2 : SCSI emulation for USB Mass Storage devices Vendor: TTI-MSA Model: USB Mobile Disk Rev: 0.0A Type: Direct-Access ANSI SCSI revision: 02 SCSI device sda: 253120 512-byte hdwr sectors (130 MB) sda: Write Protect is off sda: Mode Sense: 4b 00 00 00 sda: assuming drive cache: write through sda: sda1 Attached scsi removable disk sda at scsi2, channel 0, id 0, lun 0 Attached scsi generic sg0 at scsi2, channel 0, id 0, lun 0, type 0 Vendor: TTI-MSA Model: USB Mobile Disk Rev: 0.0A Type: Direct-Access ANSI SCSI revision: 02 SCSI device sdb: 2880 512-byte hdwr sectors (1 MB) sdb: Write Protect is off sdb: Mode Sense: 4b 00 00 00 sdb: assuming drive cache: write through sdb: sdb1 Attached scsi removable disk sdb at scsi2, channel 0, id 0, lun 1 Attached scsi generic sg1 at scsi2, channel 0, id 0, lun 1, type 0 USB Mass Storage device found at 4 New devices appear: /dev/sda1 and /dev/sdb1 (there are 2 partitions) Opening sda1 in "My computer" triggers 2 messages in dmesg: FAT: utf8 is not a recommended IO charset for FAT filesystems, filesystem will be case sensitive! FAT: utf8 is not a recommended IO charset for FAT filesystems, filesystem will be case sensitive! $ mount [...] /dev/sdb1 on /media/usb-AAAA000021:0:0:1p1 type subfs (rw,noexec,nosuid,nodev,sync,procuid,iocharset=utf8) /dev/sda1 on /media/usb-AAAA000021:0:0:0p1 type subfs (rw,noexec,nosuid,nodev,sync,procuid,iocharset=utf8) Removing device: usb 1-2: USB disconnect, address 4 ... but next time it can be: sdb : READ CAPACITY failed. sdb : status=0, message=00, host=7, driver=00 sdb : sense not available. sdb: Write Protect is off sdb: Mode Sense: 00 00 00 00 sdb: assuming drive cache: write through usb 1-2: USB disconnect, address 5 sdb : READ CAPACITY failed. sdb : status=0, message=00, host=1, driver=00 sdb : sense not available. sdb: Write Protect is off sdb: Mode Sense: 00 00 00 00 sdb: assuming drive cache: write through sdb:<3>Buffer I/O error on device sdb, logical block 0 Buffer I/O error on device sdb, logical block 0 Buffer I/O error on device sdb, logical block 262143 Buffer I/O error on device sdb, logical block 262143 Buffer I/O error on device sdb, logical block 0 ldm_validate_partition_table(): Disk read failed. Buffer I/O error on device sdb, logical block 0 unable to read partition table That's interesting, because I didn't do explicitly anything to /dev/sdb All mentioned equipment works perfectly in SUSE 9.0 (exactly the same hardware[2], another HD). It seems other people have the same problem [3]. Anyone else ? It's almost impossible to reliably use USB sticks. Regards, Jarek PS. One more question: what's the status of POSIX4 message queues in 9.2 ? Is it fully operational or not really ? Call to mq_open always returns -1, errno: 22 (Invalid argument). All arguments seem to be OK, according to [4]. References: [1] USB1.1 Mobile Disk III http://www.twinmos.com/flash/flash_p_usb11_mobile3.htm [2] Hardware Mainboard: ASUS P3BF (bought in 2000) CPU: Celeron Coppermine 1.2GHz (to be more specific, 1 GHZ boosted to 1.2), 512 MB RAM [3] "Suse 9.2 usb memory stick problem, system hangs" http://www.linuxquestions.org/questions/showthread.php? s=&forumid=4&threadid=256832 [4] Bill O. Gallmeister, "POSIX.4: Programming for the real world"