[-cc linux-pci] On Mon, Jan 13, 2014 at 1:26 AM, Grumbach, Emmanuel <emmanuel.grumbach@xxxxxxxxx> wrote: >> Hi, >> >> I am sorry but here is bad news. >> >> During previous debugging process, I have a modconf file >> /etc/modprobe.d/iwlwifi.conf, containing "options iwlmvm >> power_scheme=1". I removed it just now (Emmanuel says I can remove it >> now) and encountered (maybe) new bugs. Here is what I did just now: >> >> 0. Current kernel: patched with >> https://bugzilla.kernel.org/attachment.cgi?id=121671&action=diff ; >> setpci trick: none ; NIC status: works nice after ~16 hours heavy >> usage. >> 1. Delete that modconf file, reboot. >> 2. Network connection becomes painfully laggy and lossy. >> 3. Re-create that modconf file, reboot. >> 4. Network connection works fine. >> 5. Comment out that line, reboot. >> 6. Network connection becomes painfully laggy and lossy. >> 7. Uncomment that line, reboot. >> 8. Network connection works fine. >> >> What I mean "painfully laggy and lossy" is that, to whomever I "ping" >> (Google, 8.8.8.8, local DNS server...), the RTT is rather high than >> normal, and packet loss rate is above 90% (some addresses 100% loss). >> While at the same time, other network device in the same LAN works >> fine. >> >> I've attached dmesg and lspci output at step 6 and 8. >> > > Are you sure about step 1 and 5? > It seems completely weird that an existing file with a line commented out have any impact. It doesn't seem strange to me; maybe we're interpreting wzyboy's data differently. The way I read it, if /etc/modprobe.d/iwlwifi.conf contains "options iwlmvm power_scheme=1", everything works fine (cases 0, 4, 8). If iwlwifi.conf does not exist or contains only a commented-out line, he sees problems (cases 2, 6). > Can you please send the output of: > cat /sys/module/iwlmvm/parameters/power_scheme > in both cases. > > Also - what code base are you using? > Since this is surely not related to PCI, please remove them in your reply. > (I keep them here to have them see my mail :)) Agreed, this doesn't sound PCI-related, so I removed linux-pci. Feel free to keep me or add me back if you do see anything PCI-related. Bjorn -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
