I'm also experiencing this. In my case sdb happens to be the memory card reader. The output stops when I plug in a memory card. Here's an except from the dmesg output:
[ 1543.770351] sd 6:0:0:0: [sdb] 3970048 512-byte logical blocks: (2.03 GB/1.89 GiB) [ 1543.775577] sd 6:0:0:0: [sdb] No Caching mode page present [ 1543.775586] sd 6:0:0:0: [sdb] Assuming drive cache: write through [ 1543.780604] sd 6:0:0:0: [sdb] No Caching mode page present [ 1543.780611] sd 6:0:0:0: [sdb] Assuming drive cache: write through [ 1543.807961] sdb: sdb1 [ 2849.045190] sdb: detected capacity change from 2032664576 to 0 [ 2893.403941] sd 6:0:0:0: [sdb] 3970048 512-byte logical blocks: (2.03 GB/1.89 GiB) [ 2893.413063] sd 6:0:0:0: [sdb] No Caching mode page present [ 2893.413074] sd 6:0:0:0: [sdb] Assuming drive cache: write through [ 2893.418182] sd 6:0:0:0: [sdb] No Caching mode page present [ 2893.418190] sd 6:0:0:0: [sdb] Assuming drive cache: write through [ 2893.445548] sdb: sdb1
A similar bug has been raised at the kernel.org: https://bugzilla.kernel.org/show_bug.cgi?id=43190
I'm also experiencing this. In my case sdb happens to be the memory card reader. The output stops when I plug in a memory card. Here's an except from the dmesg output:
[ 1543.770351] sd 6:0:0:0: [sdb] 3970048 512-byte logical blocks: (2.03 GB/1.89 GiB)
[ 1543.775577] sd 6:0:0:0: [sdb] No Caching mode page present
[ 1543.775586] sd 6:0:0:0: [sdb] Assuming drive cache: write through
[ 1543.780604] sd 6:0:0:0: [sdb] No Caching mode page present
[ 1543.780611] sd 6:0:0:0: [sdb] Assuming drive cache: write through
[ 1543.807961] sdb: sdb1
[ 2849.045190] sdb: detected capacity change from 2032664576 to 0
[ 2893.403941] sd 6:0:0:0: [sdb] 3970048 512-byte logical blocks: (2.03 GB/1.89 GiB)
[ 2893.413063] sd 6:0:0:0: [sdb] No Caching mode page present
[ 2893.413074] sd 6:0:0:0: [sdb] Assuming drive cache: write through
[ 2893.418182] sd 6:0:0:0: [sdb] No Caching mode page present
[ 2893.418190] sd 6:0:0:0: [sdb] Assuming drive cache: write through
[ 2893.445548] sdb: sdb1
A similar bug has been raised at the kernel.org: https:/ /bugzilla. kernel. org/show_ bug.cgi? id=43190