Description of problem: After today's update of the kernel to 3.4, my network is superslow and times out regularily. I am using an Intel chip with iwlwifi (Lenovo T520 Thinkpad). Rebooting to older 3.3.x kernel works fine (therefore it's not my router/network/whatever). Please let me know what other info you need for diagnosing. Version-Release number of selected component (if applicable): How reproducible: Always Steps to Reproduce: 1. Update to 3.4 kernel on computer with Intel chipset / iwlwifi 2. Connect to network using wifi 3. Actual results: Browser pages load very slow, if at all (frequent timeouts), IRC, email, etc connection either very slow or timeouts. Expected results: Network should work fine. Additional info: Please let me know what you need.
Kernel version is 3.4.0-1.fc17.
There are a couple of iwlwifi fixes committed in Fedora git. You might try the scratch build Thorsten did in bug 825491 http://koji.fedoraproject.org/koji/taskinfo?taskID=4145432 Unfortunately, upstream iwlwifi has been rather bug ridden for the past couple of releases.
Created attachment 915462 [details] Comment (This comment was longer than 65,535 characters and has been moved to an attachment by Red Hat Bugzilla).
Duh. I had wd_disable=1 set for iwlwifi module. Removing this fixes the problem.
I'd say this needs to be reopened: An update in a fedora kernel caused a significant regression. It has always worked without any major problems but after updating today to 3.4.2 I get things like: [ 951.609456] iwlwifi 0000:03:00.0: GF was set with SGI:SISO (a million time until your disk is full, also makes connection slow, covered in bug Bug 832094) and now suddenly: [ 351.882096] iwlwifi 0000:03:00.0: Queue 12 stuck for 2000 ms. [ 351.882103] iwlwifi 0000:03:00.0: Current SW read_ptr 135 write_ptr 192 [ 351.882135] iwlwifi 0000:03:00.0: Current HW read_ptr 135 write_ptr 192 [ 351.882139] iwlwifi 0000:03:00.0: On demand firmware reload [ 351.882550] ieee80211 phy0: Hardware restart was requested [ 351.882600] iwlwifi 0000:03:00.0: L1 Disabled; Enabling L0S after wich the connection was completely unusable. I have never seen either problem before. Unless the iwlwifi updates fixed a real problem, please at least consider reverting some of the recent patches.