Bug 1415468
| Summary: | kernel 4.9.4-100 "broke" network stack | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Davide Corrado <davide.corrado> |
| Component: | kernel | Assignee: | Kernel Maintainer List <kernel-maint> |
| Status: | CLOSED ERRATA | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | unspecified | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 24 | CC: | cz172638, emailtoflorian, gansalmon, ichavero, itamar, jforbes, j.markmann, jonathan, kernel-maint, madhu.chinakonda, mchehab, mitroko |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | x86_64 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | If docs needed, set a value | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2017-04-18 21:00:07 UTC | Type: | Bug |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
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Description
Davide Corrado
2017-01-22 09:56:03 UTC
I had exactly the same problem with a similar WiFi Adapter. Maybe this helps solving the problem: OS: Fedora 25, 64bit Hardware: Asus PCE-N15 (it's a PCIe adapter) As long as I boot an old 4.8.x kernel, WiFi works. If I boot a 4.9.x kernel, my WiFi fails after approximately one minute. iwconfig still states that there is connection to the access point. ifconfig shows the corresponding network with assigned IP address. But I cannot get one bit through the connection. Even a simple ping fails. The loaded kernel module for the card is rtl8192ce. It seems that the implentation of the power safe mode is buggy (I found some hints in the net). The following workaround I found in a forum which works excellently in my case: Disable power safe of rtl8192ce when loaded. I created a conf file for modprobe /etc/modprobe.d/rtl8192ce.conf with the following entry: options rtl8192ce ips=0 fwlps=0 After unload/load of rtl8192ce or a reboot, WiFi was working also with 4.9 kernels. Maybe you should disable power safe mode it by default until it's correctly implemented. Duplicate for 1415339(https://bugzilla.redhat.com/show_bug.cgi?id=1415339) the issue still exists with latest 4.9 kernels so far. in the past (I mean at least one year ago) i was using these options for the given module: # Disable powersaving options rtl8192ce ips=0 # WARNING! Do not enable this shit. # It causes bugs. options rtl8192ce fwlps=0 # Use software control instead options rtl8192ce swlps=1 then, I discovered that they weren't needed anymore, so I forgot. Reading your reply brought this back. thanks. Thank you guys, that worked for me as well. *********** MASS BUG UPDATE ************** We apologize for the inconvenience. There are a large number of bugs to go through and several of them have gone stale. Due to this, we are doing a mass bug update across all of the Fedora 24 kernel bugs. Fedora 25 has now been rebased to 4.10.9-100.fc24. Please test this kernel update (or newer) and let us know if you issue has been resolved or if it is still present with the newer kernel. If you have moved on to Fedora 26, and are still experiencing this issue, please change the version to Fedora 26. If you experience different issues, please open a new bug report for those. With the current kernel (4.10.9-100), WiFi also works in my case without the extra arguments. Excellent, going to close this, if others are still seeing the issue with a 4.10 kernel, please reopen. |