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Bug 324407 - sys-kernel/gentoo-sources-2.6.34, sys-power/nut: Powercom BNT-800AP (cypress_m8) doesn't work anymore
Summary: sys-kernel/gentoo-sources-2.6.34, sys-power/nut: Powercom BNT-800AP (cypress_...
Alias: None
Product: Gentoo Linux
Classification: Unclassified
Component: [OLD] Core system (show other bugs)
Hardware: AMD64 Linux
: High normal (vote)
Assignee: Gentoo Kernel Bug Wranglers and Kernel Maintainers
Depends on:
Reported: 2010-06-16 22:12 UTC by NiTr0
Modified: 2010-06-24 20:25 UTC (History)
0 users

See Also:
Package list:
Runtime testing required: ---

current kernel config (config.gz,17.30 KB, application/octet-stream)
2010-06-16 22:14 UTC, NiTr0

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Description NiTr0 2010-06-16 22:12:29 UTC
I upgraded kernel to 2.6.34, and found that this kernel doesn't work correctly with my UPS USB->serial (cypress_m8 based). ttyUSB0 was successfully created, but nut can't read response from UPSю Фе startup I get such message:
Network UPS Tools - UPS driver controller 2.4.1
Network UPS Tools - PowerCom protocol UPS driver 0.12 (2.4.1)
data receiving error (0 instead of 16 bytes)
data receiving error (0 instead of 16 bytes)  
After switching back to sys-kernel/gentoo-sources-2.6.32-r7 kernel - all working OK.

Reproducible: Always

Steps to Reproduce:
Install Gentoo with sys-kernel/gentoo-sources-2.6.34 + sys-power/nut-2.4.1-r1, configure nut for Powercom UPS, connect UPS and try to start upsdrv.
Comment 1 NiTr0 2010-06-16 22:14:28 UTC
Created attachment 235663 [details]
current kernel config
Comment 2 Robin Johnson archtester Gentoo Infrastructure gentoo-dev Security 2010-06-17 19:33:40 UTC
kernel: potential breakage in USB stack?
Comment 3 NiTr0 2010-06-18 10:00:10 UTC
USB flash works OK, also all is OK on my netbook (Gentoo/2.6.34) with Quallcom modem (uses modules `usbserial` and `option`). So it looks like trouble is in cypress_m8...
Comment 4 NiTr0 2010-06-18 12:30:32 UTC
Yes, trouble is really in cypress_m8 driver - I've compiled driver from 2.6.32 kernel, and it works perfect.
Comment 5 Mike Pagano gentoo-dev 2010-06-24 20:25:24 UTC
We'll watch the upstream bug and port any resultant patches to earlier kernels.