Someone at Canonical told me it is surely a kernel or module bug. Every software or command line solution have been tried.
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-lts-utopic in Ubuntu. https://bugs.launchpad.net/bugs/1482435 Title: Wi-Fi not working after Sleep Status in linux-lts-utopic package in Ubuntu: New Bug description: After sleep mode, the Wi-Fi chip is not recognized by the kernel module and therefore is not available. It is recognized after a reboot or after hibernating though. I have tried a lot of possibilities. Someone suggested the following command: sudo nmcli nm sleep false But it does nothing. This has nothing to do with the hardware Wi-Fi switch. I know its purpose and tried switching on and off. Also, the output of the command nmcli nm, nmcli c and nmcli d after coming back from sleep mode is showed below. Notice nmcli d shows no wlan1 device (which is how my wireless device is identified normally). mario@mario-Compaq-Presario-laptop:~$ nmcli nm ÉTAT FONCT. ÉTAT MATÉRIEL-WIFI WIFI MATÉRIEL-WWAN WWAN actif connecté activé activé activé activé mario@mario-Compaq-Presario-laptop:~$ nmcli c NOM UUID TYPE TIMESTAMP-REAL Connexion filaire 1 cdf0b2eb-484c-4cb9-85fe-ca2d4b717505 802-3-ethernet mar 04 aoû 2015 23:06:56 EDT JeLisVosCourriels dcefe472-5b7b-4ae5-9066-0acdf1aec24b 802-11-wireless mar 04 aoû 2015 22:57:57 EDT mario@mario-Compaq-Presario-laptop:~$ nmcli d PÉRIPHÉRIQUE TYPE ÉTAT eth1 802-3-ethernet connecté Last but not least, the output of dmesg | grep iwl (after sleep) is [ 693.890526] iwl3945 0000:01:00.0: bad EEPROM signature,EEPROM_GP=0x00000007 [ 693.890532] iwl3945 0000:01:00.0: EEPROM not found, EEPROM_GP=0xffffffff [ 693.890563] iwl3945 0000:01:00.0: Unable to init EEPROM [ 693.890713] iwl3945: probe of 0000:01:00.0 failed with error -2 And I think this tells it all. Ubuntu release 14.04 Ubuntu 14.04.2 LTS Wi-Fi chip is Intel 3945ABG and module is iwl3945. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.16.0-45-generic 3.16.0-45.60~14.04.1 ProcVersionSignature: Ubuntu 3.16.0-45.60~14.04.1-generic 3.16.7-ckt14 Uname: Linux 3.16.0-45-generic x86_64 NonfreeKernelModules: wl ApportVersion: 2.14.1-0ubuntu3.11 Architecture: amd64 CurrentDesktop: Unity Date: Thu Aug 6 19:49:20 2015 InstallationDate: Installed on 2015-07-25 (12 days ago) InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1) SourcePackage: linux-lts-utopic UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-lts-utopic/+bug/1482435/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
