Bonjour, The issue now is about wifi connections and usb (!!) If I plug an external usb harddrive, the wifi connection becomes awfull: I tested the rate of transfert from one computer to my updated laptop, using this: dd if=/dev/zero of=test bs=100M count=1; scp test me@laptop:/dev/null; Without any usb hdd plugged, the rate begins at 4.7MB/s and falls down to 2.4MB/s which is acceptable I think. With an usb hdd plugged (I tested with several devices), the rate quickly falls down to 100KB/s sometimes to 20KB/s and sometimes remains completely stalled. Moreover, the wifi connection is very often disconnected (even when there is no tranfert of data at all).

Why do I think that it an update issue?: 1- because this behaviour did not happen before the update... 2- I have another laptop (exacttly the same, same brand, same model) which I did not update and this issue does not happen! Here is the list of udated packages: <----------------------------------------------- Installation de: kernel x86_64 4.4.8-300.fc23 updates 58 k kernel-core x86_64 4.4.8-300.fc23 updates 20 M kernel-debug-core x86_64 4.4.8-300.fc23 updates 22 M kernel-debug-modules x86_64 4.4.8-300.fc23 updates 19 M kernel-debug-modules-extra x86_64 4.4.8-300.fc23 updates 2.3 M kernel-modules x86_64 4.4.8-300.fc23 updates 18 M python2-ptyprocess noarch 0.5.1-1.fc23 updates 28 k remplacement de python-ptyprocess.noarch 0.5-2.fc23 python3-pysocks noarch 1.5.6-2.fc23 updates 25 k Mise à jour: GeoIP-GeoLite-data noarch 2016.04-1.fc23 updates 388 k ModemManager x86_64 1.4.14-1.fc23 updates 698 k ModemManager-glib x86_64 1.4.14-1.fc23 updates 217 k NetworkManager x86_64 1:1.0.12-2.fc23 updates 1.9 M NetworkManager-adsl x86_64 1:1.0.12-2.fc23 updates 115 k NetworkManager-bluetooth x86_64 1:1.0.12-2.fc23 updates 137 k NetworkManager-glib x86_64 1:1.0.12-2.fc23 updates 370 k NetworkManager-libnm x86_64 1:1.0.12-2.fc23 updates 482 k NetworkManager-team x86_64 1:1.0.12-2.fc23 updates 116 k NetworkManager-wifi x86_64 1:1.0.12-2.fc23 updates 145 k NetworkManager-wwan x86_64 1:1.0.12-2.fc23 updates 137 k abrt x86_64 2.8.0-5.fc23 updates 535 k abrt-addon-ccpp x86_64 2.8.0-5.fc23 updates 194 k abrt-addon-coredump-helper x86_64 2.8.0-5.fc23 updates 110 k abrt-addon-kerneloops x86_64 2.8.0-5.fc23 updates 126 k abrt-addon-pstoreoops x86_64 2.8.0-5.fc23 updates 104 k abrt-addon-python3 x86_64 2.8.0-5.fc23 updates 103 k abrt-addon-vmcore x86_64 2.8.0-5.fc23 updates 114 k abrt-addon-xorg x86_64 2.8.0-5.fc23 updates 116 k abrt-cli x86_64 2.8.0-5.fc23 updates 95 k abrt-dbus x86_64 2.8.0-5.fc23 updates 129 k abrt-desktop x86_64 2.8.0-5.fc23 updates 95 k abrt-gui x86_64 2.8.0-5.fc23 updates 193 k abrt-gui-libs x86_64 2.8.0-5.fc23 updates 105 k abrt-libs x86_64 2.8.0-5.fc23 updates 122 k abrt-plugin-bodhi x86_64 2.8.0-5.fc23 updates 108 k abrt-python3 x86_64 2.8.0-5.fc23 updates 119 k abrt-retrace-client x86_64 2.8.0-5.fc23 updates 131 k abrt-tui x86_64 2.8.0-5.fc23 updates 107 k audit x86_64 2.5.1-1.fc23 updates 240 k audit-libs i686 2.5.1-1.fc23 updates 96 k audit-libs x86_64 2.5.1-1.fc23 updates 95 k audit-libs-python3 x86_64 2.5.1-1.fc23 updates 95 k autocorr-en noarch 1:5.0.6.2-3.fc23 updates 204 k avahi x86_64 0.6.32-1.fc23 updates 274 k avahi-autoipd x86_64 0.6.32-1.fc23 updates 31 k avahi-glib x86_64 0.6.32-1.fc23 updates 16 k avahi-libs x86_64 0.6.32-1.fc23 updates 62 k bluez x86_64 5.39-1.fc23 updates 1.2 M bluez-cups x86_64 5.39-1.fc23 updates 86 k bluez-libs x86_64 5.39-1.fc23 updates 83 k breeze-cursor-theme noarch 5.6.2-3.fc23 updates 259 k breeze-icon-theme noarch 5.21.0-1.fc23 updates 3.7 M btrfs-progs x86_64 4.4.1-1.fc23 updates 593 k catfish noarch 1.4.2-1.fc23 updates 174 k createrepo_c x86_64 0.10.0-5.fc23 updates 70 k createrepo_c-libs x86_64 0.10.0-5.fc23 updates 95 k dhcp-client x86_64 12:4.3.3-9.P1.fc23 updates 300 k dhcp-common noarch 12:4.3.3-9.P1.fc23 updates 194 k dhcp-libs x86_64 12:4.3.3-9.P1.fc23 updates 138 k dnf noarch 1.1.8-1.fc23 updates 292 k dnf-conf noarch 1.1.8-1.fc23 updates 94 k dnf-plugins-core noarch 0.1.20-1.fc23 updates 39 k dnf-yum noarch 1.1.8-1.fc23 updates 87 k elfutils x86_64 0.166-1.fc23 updates 304 k elfutils-default-yama-scope noarch 0.166-1.fc23 updates 38 k elfutils-libelf i686 0.166-1.fc23 updates 220 k elfutils-libelf x86_64 0.166-1.fc23 updates 215 k elfutils-libs i686 0.166-1.fc23 updates 299 k elfutils-libs x86_64 0.166-1.fc23 updates 272 k emacs-filesystem noarch 1:24.5-10.fc23 updates 65 k expat i686 2.1.1-1.fc23 updates 91 k expat x86_64 2.1.1-1.fc23 updates 86 k firefox x86_64 46.0.1-1.fc23 updates 79 M flash-plugin x86_64 11.2.202.616-release adobe-linux-x86_64 6.9 M gd x86_64 2.1.1-5.fc23 updates 145 k gdb x86_64 7.10.1-31.fc23 updates 3.2 M gnome-abrt x86_64 1.2.2-2.fc23 updates 248 k gnutls x86_64 3.4.11-1.fc23 updates 660 k gparted x86_64 0.26.0-3.fc23 updates 1.9 M gssdp x86_64 0.14.15-1.fc23 updates 54 k gstreamer1 i686 1.6.4-1.fc23 updates 1.1 M gstreamer1 x86_64 1.6.4-1.fc23 updates 1.1 M gstreamer1-plugins-bad-free x86_64 1.6.4-1.fc23 updates 1.8 M gstreamer1-plugins-base i686 1.6.4-1.fc23 updates 1.3 M gstreamer1-plugins-base x86_64 1.6.4-1.fc23 updates 1.4 M gstreamer1-plugins-good x86_64 1.6.4-1.fc23 updates 2.0 M gtkmm30 x86_64 3.18.1-1.fc23 updates 899 k gupnp x86_64 0.20.17-1.fc23 updates 99 k hplip x86_64 3.16.3-1.fc23 updates 12 M hplip-common x86_64 3.16.3-1.fc23 updates 99 k hplip-libs x86_64 3.16.3-1.fc23 updates 191 k hwdata noarch 0.288-1.fc23 updates 1.4 M ibus-typing-booster noarch 1.4.1-1.fc23 updates 159 k imlib2 x86_64 1.4.8-1.fc23 updates 214 k java-1.8.0-openjdk-headless x86_64 1:1.8.0.91-2.b14.fc23 updates 32 M k3b-extras-freeworld x86_64 1:2.0.3-1.fc23 rpmfusion-free-updates-testing 73 k kde-l10n noarch 15.12.3-5.fc23 updates 9.2 k kde-settings noarch 23-11.fc23.1 updates 52 k kf5-filesystem x86_64 5.21.0-1.fc23 updates 15 k krb5-libs i686 1.14.1-5.fc23 updates 859 k krb5-libs x86_64 1.14.1-5.fc23 updates 842 k less x86_64 481-5.fc23 updates 157 k libatomic_ops x86_64 7.4.2-9.fc23 updates 32 k libblkid x86_64 2.28-1.fc23 updates 179 k libfdisk x86_64 2.28-1.fc23 updates 221 k libgcc i686 5.3.1-6.fc23 updates 101 k libgcc x86_64 5.3.1-6.fc23 updates 92 k libgfortran x86_64 5.3.1-6.fc23 updates 297 k libgomp x86_64 5.3.1-6.fc23 updates 156 k libinput x86_64 1.2.4-1.fc23 updates 107 k libipa_hbac x86_64 1.13.4-2.fc23 updates 74 k libmbim x86_64 1.12.4-2.fc23 updates 80 k libmbim-utils x86_64 1.12.4-2.fc23 updates 39 k libmount x86_64 2.28-1.fc23 updates 198 k libqmi x86_64 1.12.10-1.fc23 updates 349 k libqmi-utils x86_64 1.12.10-1.fc23 updates 71 k libquadmath x86_64 5.3.1-6.fc23 updates 183 k libreoffice-calc x86_64 1:5.0.6.2-3.fc23 updates 8.6 M libreoffice-core x86_64 1:5.0.6.2-3.fc23 updates 74 M libreoffice-draw x86_64 1:5.0.6.2-3.fc23 updates 683 k libreoffice-emailmerge x86_64 1:5.0.6.2-3.fc23 updates 86 k libreoffice-graphicfilter x86_64 1:5.0.6.2-3.fc23 updates 450 k libreoffice-impress x86_64 1:5.0.6.2-3.fc23 updates 1.3 M libreoffice-math x86_64 1:5.0.6.2-3.fc23 updates 1.0 M libreoffice-opensymbol-fonts noarch 1:5.0.6.2-3.fc23 updates 246 k libreoffice-pdfimport x86_64 1:5.0.6.2-3.fc23 updates 280 k libreoffice-pyuno x86_64 1:5.0.6.2-3.fc23 updates 516 k libreoffice-ure x86_64 1:5.0.6.2-3.fc23 updates 2.5 M libreoffice-writer x86_64 1:5.0.6.2-3.fc23 updates 4.3 M libreport x86_64 2.6.4-2.fc23 updates 458 k libreport-anaconda x86_64 2.6.4-2.fc23 updates 55 k libreport-cli x86_64 2.6.4-2.fc23 updates 59 k libreport-fedora x86_64 2.6.4-2.fc23 updates 52 k libreport-filesystem x86_64 2.6.4-2.fc23 updates 46 k libreport-gtk x86_64 2.6.4-2.fc23 updates 111 k libreport-plugin-bugzilla x86_64 2.6.4-2.fc23 updates 93 k libreport-plugin-kerneloops x86_64 2.6.4-2.fc23 updates 57 k libreport-plugin-logger x86_64 2.6.4-2.fc23 updates 62 k libreport-plugin-reportuploader x86_64 2.6.4-2.fc23 updates 70 k libreport-plugin-ureport x86_64 2.6.4-2.fc23 updates 66 k libreport-python3 x86_64 2.6.4-2.fc23 updates 81 k libreport-web x86_64 2.6.4-2.fc23 updates 64 k libreswan x86_64 3.17-1.fc23 updates 1.1 M librsvg2 x86_64 2.40.15-1.fc23 updates 134 k libseccomp i686 2.3.1-0.fc23 updates 58 k libseccomp x86_64 2.3.1-0.fc23 updates 61 k libsmartcols x86_64 2.28-1.fc23 updates 142 k libsmbclient x86_64 2:4.3.8-0.fc23 updates 123 k libsolv x86_64 0.6.20-1.fc23 updates 336 k libsoup x86_64 2.52.2-2.fc23 updates 386 k libsss_autofs x86_64 1.13.4-2.fc23 updates 78 k libsss_idmap x86_64 1.13.4-2.fc23 updates 80 k libsss_nss_idmap x86_64 1.13.4-2.fc23 updates 78 k libsss_sudo x86_64 1.13.4-2.fc23 updates 77 k libstdc++ i686 5.3.1-6.fc23 updates 454 k libstdc++ x86_64 5.3.1-6.fc23 updates 429 k libtalloc x86_64 2.1.6-1.fc23 updates 44 k libtasn1 x86_64 4.8-1.fc23 updates 325 k libtdb x86_64 1.3.9-1.fc23 updates 50 k libteam x86_64 1.24-1.fc23 updates 55 k libuuid i686 2.28-1.fc23 updates 80 k libuuid x86_64 2.28-1.fc23 updates 79 k libwacom x86_64 0.18-2.fc23 updates 35 k libwacom-data noarch 0.18-2.fc23 updates 56 k libwbclient x86_64 2:4.3.8-0.fc23 updates 96 k lightdm x86_64 1.10.6-4.fc23 updates 198 k lightdm-gobject x86_64 1.10.6-4.fc23 updates 62 k lldpad x86_64 1.0.1-4.git036e314.fc23 updates 290 k mencoder x86_64 1.2.1-2.fc23 rpmfusion-free-updates-testing 867 k mplayer x86_64 1.2.1-2.fc23 rpmfusion-free-updates-testing 1.2 M mplayer-common x86_64 1.2.1-2.fc23 rpmfusion-free-updates-testing 1.2 M ntfs-3g x86_64 2:2016.2.22-1.fc23 updates 291 k ntfsprogs x86_64 2:2016.2.22-1.fc23 updates 342 k openssh x86_64 7.2p2-3.fc23 updates 443 k openssh-askpass x86_64 7.2p2-3.fc23 updates 81 k openssh-clients x86_64 7.2p2-3.fc23 updates 664 k openssh-server x86_64 7.2p2-3.fc23 updates 464 k openssl x86_64 1:1.0.2h-1.fc23 updates 498 k openssl-libs i686 1:1.0.2h-1.fc23 updates 988 k openssl-libs x86_64 1:1.0.2h-1.fc23 updates 1.2 M oxygen-icon-theme noarch 1:5.21.0-2.fc23 updates 29 M parted x86_64 3.2-18.fc23 updates 534 k poppler x86_64 0.34.0-2.fc23 updates 796 k poppler-glib x86_64 0.34.0-2.fc23 updates 143 k poppler-utils x86_64 0.34.0-2.fc23 updates 179 k protobuf-c x86_64 1.2.1-1.fc23 updates 34 k pygtk2 x86_64 2.24.0-14.fc23 updates 922 k pygtk2-libglade x86_64 2.24.0-14.fc23 updates 30 k python x86_64 2.7.11-3.fc23 updates 95 k python-libs x86_64 2.7.11-3.fc23 updates 5.8 M python-sssdconfig noarch 1.13.4-2.fc23 updates 101 k python3 x86_64 3.4.3-6.fc23 updates 54 k python3-dnf noarch 1.1.8-1.fc23 updates 455 k python3-dnf-plugins-core noarch 0.1.20-1.fc23 updates 83 k python3-libs x86_64 3.4.3-6.fc23 updates 6.7 M python3-pillow x86_64 3.0.0-4.fc23 updates 568 k python3-requests noarch 2.10.0-1.fc23 updates 108 k python3-sssdconfig noarch 1.13.4-2.fc23 updates 101 k python3-urllib3 noarch 1.15.1-1.fc23 updates 133 k qt-settings noarch 23-11.fc23.1 updates 25 k qt5-qtbase x86_64 5.6.0-9.fc23 updates 3.1 M qt5-qtbase-common noarch 5.6.0-9.fc23 updates 28 k qt5-qtbase-gui x86_64 5.6.0-9.fc23 updates 5.3 M rpcbind x86_64 0.2.3-7.rc1.fc23 updates 63 k rpm x86_64 4.13.0-0.rc1.13.fc23 updates 510 k rpm-build-libs x86_64 4.13.0-0.rc1.13.fc23 updates 116 k rpm-libs x86_64 4.13.0-0.rc1.13.fc23 updates 294 k rpm-plugin-selinux x86_64 4.13.0-0.rc1.13.fc23 updates 51 k rpm-plugin-systemd-inhibit x86_64 4.13.0-0.rc1.13.fc23 updates 51 k rpm-python x86_64 4.13.0-0.rc1.13.fc23 updates 100 k rpm-python3 x86_64 4.13.0-0.rc1.13.fc23 updates 101 k samba-client x86_64 2:4.3.8-0.fc23 updates 550 k samba-client-libs x86_64 2:4.3.8-0.fc23 updates 4.6 M samba-common noarch 2:4.3.8-0.fc23 updates 187 k samba-common-libs x86_64 2:4.3.8-0.fc23 updates 158 k selinux-policy noarch 3.13.1-158.14.fc23 updates 441 k selinux-policy-targeted noarch 3.13.1-158.14.fc23 updates 5.6 M setroubleshoot x86_64 3.3.5-3.fc23 updates 135 k setroubleshoot-plugins noarch 3.3.3-1.fc23 updates 421 k setroubleshoot-server x86_64 3.3.5-3.fc23 updates 394 k sssd x86_64 1.13.4-2.fc23 updates 68 k sssd-ad x86_64 1.13.4-2.fc23 updates 181 k sssd-client x86_64 1.13.4-2.fc23 updates 137 k sssd-common x86_64 1.13.4-2.fc23 updates 1.1 M sssd-common-pac x86_64 1.13.4-2.fc23 updates 114 k sssd-ipa x86_64 1.13.4-2.fc23 updates 251 k sssd-krb5 x86_64 1.13.4-2.fc23 updates 106 k sssd-krb5-common x86_64 1.13.4-2.fc23 updates 135 k sssd-ldap x86_64 1.13.4-2.fc23 updates 173 k sssd-proxy x86_64 1.13.4-2.fc23 updates 101 k teamd x86_64 1.24-1.fc23 updates 120 k thunderbird x86_64 45.0-4.fc23 updates 64 M traceroute x86_64 3:2.1.0-2.fc23 updates 66 k tzdata noarch 2016d-1.fc23 updates 413 k tzdata-java noarch 2016d-1.fc23 updates 181 k unbound-libs x86_64 1.5.8-2.fc23 updates 372 k util-linux x86_64 2.28-1.fc23 updates 2.2 M vim-minimal x86_64 2:7.4.1718-1.fc23 updates 501 k wavpack x86_64 4.80.0-1.fc23 updates 151 k webkitgtk x86_64 2.4.11-1.fc23 updates 12 M webkitgtk3 x86_64 2.4.11-1.fc23 updates 12 M xdg-utils noarch 1.1.1-3.fc23 updates 82 k xerces-c x86_64 3.1.3-1.fc23 updates 908 k xorg-x11-drv-openchrome x86_64 0.4.0-1.fc23 updates 169 k xorg-x11-drv-wacom x86_64 0.30.0-4.fc23 updates 304 k xorg-x11-server-Xorg x86_64 1.18.3-1.fc23 updates 1.4 M xorg-x11-server-common x86_64 1.18.3-1.fc23 updates 45 k youtube-dl noarch 2016.05.01-1.fc23 updates 1.8 M Suppression: kernel x86_64 4.4.4-301.fc23 @updates 0 kernel-core x86_64 4.4.4-301.fc23 @updates 52 M kernel-debug-core x86_64 4.4.4-301.fc23 @updates 54 M kernel-debug-modules x86_64 4.4.4-301.fc23 @updates 18 M kernel-debug-modules-extra x86_64 4.4.4-301.fc23 @updates 2.2 M kernel-modules x86_64 4.4.4-301.fc23 @updates 18 M <------------------------------------- which of these packages could be responsible for this issue? I can exclude the kernel, because I tested the problem with the previous one (4.4.6) and NetworkManager* because I downgraded them.

The problem is the same with all kernels: as soon as a hdd is plugged in an usb port, the rate slows down and even the wifi connection stops. So it is not a kernel modules problem.

On 05/13/2016 02:33 PM, François Patte wrote: > Le 13/05/2016 18:45, Rick Stevens a écrit : >> On 05/13/2016 02:12 AM, François Patte wrote: >>> Bonjour, >>> >>> The issue now is about wifi connections and usb (!!) >>> >>> If I plug an external usb harddrive, the wifi connection becomes >>> awfull: >>> I tested the rate of transfert from one computer to my updated laptop, >>> using this: >>> >>> dd if=/dev/zero of=test bs=100M count=1; scp test me@laptop:/dev/null; >>> >>> Without any usb hdd plugged, the rate begins at 4.7MB/s and falls down >>> to 2.4MB/s which is acceptable I think. >>> >>> With an usb hdd plugged (I tested with several devices), the rate >>> quickly falls down to 100KB/s sometimes to 20KB/s and sometimes remains >>> completely stalled. Moreover, the wifi connection is very often >>> disconnected (even when there is no tranfert of data at all). >> >> It is not uncommon for a laptop's wifi to be on the USB bus. My Dell >> laptop does precisely this (it is on one of the EHCI controllers). > > Yes, it is a laptop Dell (latitude e6540) Ok, it could (and I mean "_could_") be a firmware issue with the underlying USB hardware. I can only suggest two things at this point.

Item 1: See if you can plug the HDD into a port that's on a different USB device on the machine. You can use the "lsusb -t" utility (as root) to show you a tree of what's on the USB ports. Mine looks like: [root@golem4 ~]# lsusb -t /: Bus 04.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 5000M /: Bus 03.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 480M /: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/2p, 480M |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/8p, 480M |__ Port 5: Dev 3, If 0, Class=Wireless, Driver=btusb, 12M |__ Port 5: Dev 3, If 1, Class=Wireless, Driver=btusb, 12M |__ Port 6: Dev 4, If 0, Class=Vendor Specific Class, Driver=, 480M /: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/2p, 480M |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/6p, 480M |__ Port 4: Dev 4, If 0, Class=Video, Driver=uvcvideo, 480M |__ Port 4: Dev 4, If 1, Class=Video, Driver=uvcvideo, 480M The first ehci device has both the bluetooth and wifi on it. The second ehci device has the webcam on it. Try to plug the HDD into a port that's not shared with the "wireless" stuff (verify with the lsusb command). If you can find one, see if that helps.

Debugging wifi is always problematic since it's difficult to isolate if the issue is with the NIC on the laptop or the access point at the other end. You could try taking your machine to somewhere like an internet cafe or somewhere else you have wifi access to see if the problem persists there (make sure you have your firewall up and you don't have any personal info exposed). If it persists, then yeah, your wifi may be going bad. If it doesn't, that points at issues with your access point. To be honest, I've had access points go bad far more often than the NIC in the laptop.

On Fri, 2016-05-13 at 11:12 +0200, François Patte wrote: > The issue now is about wifi connections and usb (!!) > > If I plug an external usb harddrive, the wifi connection becomes > awfull: Important question: Is the USB harddrive externally powered? Ed makes the point that the USB host may not handle powering the drive and the WiFi, very well, simultaneously. I'll make the point that some externally power supplies are absolutely terrible, they can radiate a massive amount of electromagnetic interference. I've had a couple that could knock an ADSL modem off-line if I plugged them into a computer, anywhere on the network, even in a different room. The drive just had to be connected, the system it was plugged into could be completely powered off. It just spewed crap everywhere. The modem would die off and stay unworkable.