This is trace from 5.3-rc1. I am not sure if it's right one. [ 123.722504] kernel: ------------[ cut here ]------------ [ 123.722541] kernel: WARNING: CPU: 1 PID: 153 at net/wireless/core.c:868 wiphy_register.cold+0xe4/0x2e5 [cfg80211] [ 123.722541] kernel: Modules linked in: bnep intel_rapl_msr mei_hdcp nls_iso8859_1 intel_rapl_common x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm irqbypass snd_hda_codec_cirrus snd_hda_codec_generic ledtrig_audio snd_hda_codec_hdmi crct10dif_pclmul snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_pcm ghash_clmulni_intel snd_seq_midi snd_seq_midi_event amdgpu(+) applesmc input_polldev snd_rawmidi snd_seq amd_iommu_v2 aesni_intel snd_seq_device snd_timer gpu_sched aes_x86_64 crypto_simd uvcvideo videobuf2_vmalloc videobuf2_memops cryptd btusb ttm glue_helper videobuf2_v4l2 intel_cstate btrtl intel_rapl_perf videobuf2_common btbcm btintel brcmfmac brcmutil bluetooth snd ecdh_generic input_leds videodev mc ecc cfg80211 drm_kms_helper i2c_algo_bit fb_sys_fops syscopyarea sysfillrect soundcore sysimgblt mei_me mei acpi_als kfifo_buf industrialio apple_bl mac_hid sch_fq_codel iptable_filter ip6table_filter ip6_tables br_netfilter bridge stp llc arp_tables parport_pc ppdev lp parport [ 123.722559] kernel: drm ip_tables x_tables autofs4 hid_apple hid_generic usbhid hid sdhci_pci crc32_pclmul cqhci i2c_i801 thunderbolt sdhci tg3 video ahci libahci [ 123.722564] kernel: CPU: 1 PID: 153 Comm: kworker/1:1 Not tainted 5.3.0-050300rc1-generic #201907212232 [ 123.722565] kernel: Hardware name: Apple Inc. iMac17,1/Mac-B809C3757DA9BB8D, BIOS 176.0.0.0.0 01/31/2020 [ 123.722568] kernel: Workqueue: events request_firmware_work_func [ 123.722580] kernel: RIP: 0010:wiphy_register.cold+0xe4/0x2e5 [cfg80211] [ 123.722581] kernel: Code: ff e9 7a 58 fa ff 48 c7 c7 48 df 79 c0 e8 0e e3 56 f4 0f 0b b8 ea ff ff ff e9 62 58 fa ff 48 c7 c7 48 df 79 c0 e8 f6 e2 56 f4 <0f> 0b b8 ea ff ff ff e9 4a 58 fa ff 48 c7 c7 48 df 79 c0 e8 de e2 [ 123.722582] kernel: RSP: 0000:ffffb82140233c40 EFLAGS: 00010246 [ 123.722582] kernel: RAX: 0000000000000024 RBX: 000000000000070e RCX: 0000000000000000 [ 123.722583] kernel: RDX: 0000000000000000 RSI: ffff9d249ea97448 RDI: ffff9d249ea97448 [ 123.722583] kernel: RBP: ffffb82140233cc0 R08: ffff9d249ea97448 R09: 0000000000000004 [ 123.722584] kernel: R10: 0000000000000000 R11: 0000000000000001 R12: ffff9d2476cdc300 [ 123.722584] kernel: R13: ffff9d2476cdc300 R14: ffff9d247eab18c0 R15: ffff9d247eab0000 [ 123.722585] kernel: FS: 0000000000000000(0000) GS:ffff9d249ea80000(0000) knlGS:0000000000000000 [ 123.722585] kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 123.722586] kernel: CR2: 0000556254966c28 CR3: 000000043b84e004 CR4: 00000000003606e0 [ 123.722586] kernel: DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 123.722587] kernel: DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 123.722587] kernel: Call Trace: [ 123.722595] kernel: ? handle_channel_custom.isra.0+0x8d/0x160 [cfg80211] [ 123.722603] kernel: ? wiphy_apply_custom_regulatory+0x73/0xc0 [cfg80211] [ 123.722609] kernel: brcmf_cfg80211_attach+0x1d8/0x630 [brcmfmac] [ 123.722614] kernel: ? brcmf_feat_iovar_int_get+0x5f/0xc0 [brcmfmac] [ 123.722619] kernel: brcmf_attach+0x1e2/0x3f0 [brcmfmac] [ 123.722621] kernel: ? __kmalloc+0x180/0x270 [ 123.722626] kernel: brcmf_pcie_setup+0x3b9/0x480 [brcmfmac] [ 123.722631] kernel: brcmf_fw_request_done+0x71/0x100 [brcmfmac] [ 123.722632] kernel: request_firmware_work_func+0x4e/0x90 [ 123.722633] kernel: process_one_work+0x1db/0x380 [ 123.722634] kernel: worker_thread+0x4d/0x400 [ 123.722636] kernel: kthread+0x104/0x140 [ 123.722637] kernel: ? process_one_work+0x380/0x380 [ 123.722638] kernel: ? kthread_park+0x80/0x80 [ 123.722639] kernel: ret_from_fork+0x35/0x40 [ 123.722641] kernel: ---[ end trace 5fb4c62e783069b7 ]---
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1874104 Title: Very slow boot, wake from sleep and shutdown with 5.4 kernel Status in linux package in Ubuntu: Confirmed Bug description: I upgraded a Ubuntu 18.04 installation to 20.04 beta on my late 2015 5k 27" iMac. The new 5.4 kernel was installed and has been updated a few times. The former LTS kernel (4.15) was retained. When I start up the computer with the new kernel, the process is very slow and it takes about 2 1/2 minutes to get to a working desktop. Doing the same startup with the old 4.15 kernel (in the 20.04 beta) takes approximately 25 seconds to a working desktop. Similarly, changing display settings, waking from sleep and shutting down the computer all take several minutes with the 5.4 kernel, vs 10-30 seconds with the 4.15 kernel. To provide more information, I tried starting up this computer with the 5.3 kernel from a 19.10 live USB, and from a 5.0 kernel in the Peppermint Linux live USB that is based on Ubuntu. The 5.3 kernel is as slow as the 5.4 kernel, whereas the 5.0 kernel works similarly to the 4.15 LTS kernel. I suspect that the problem relates to the Radeon m9 390x video card in my iMac, but I have no idea what might have changed in the newer kernels to affect their compatibility with this iMac. ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: linux-image-5.4.0-25-generic 5.4.0-25.29 ProcVersionSignature: Ubuntu 5.4.0-25.29-generic 5.4.30 Uname: Linux 5.4.0-25-generic x86_64 ApportVersion: 2.20.11-0ubuntu27 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC2: mfox 2497 F.... pulseaudio /dev/snd/controlC0: mfox 2497 F.... pulseaudio /dev/snd/controlC1: mfox 2497 F.... pulseaudio CasperMD5CheckResult: skip CurrentDesktop: ubuntu:GNOME Date: Tue Apr 21 10:55:18 2020 HibernationDevice: # RESUME=UUID=5e4ca488-e781-4ee7-aeb3-8adc968cd22a InstallationDate: Installed on 2018-05-09 (712 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) MachineType: Apple Inc. iMac17,1 ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_CA.UTF-8 SHELL=/bin/bash ProcFB: 0 amdgpudrmfb ProcKernelCmdLine: \boot\vmlinuz-5.4.0-25-generic ro root=UUID=0559983a-7175-4ab1-af46-7a117ee78ead initrd=boot\initrd.img-5.4.0-25-generic RelatedPackageVersions: linux-restricted-modules-5.4.0-25-generic N/A linux-backports-modules-5.4.0-25-generic N/A linux-firmware 1.187 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 01/31/2020 dmi.bios.vendor: Apple Inc. dmi.bios.version: 176.0.0.0.0 dmi.board.name: Mac-B809C3757DA9BB8D dmi.board.vendor: Apple Inc. dmi.board.version: iMac17,1 dmi.chassis.type: 9 dmi.chassis.vendor: Apple Inc. dmi.chassis.version: Mac-B809C3757DA9BB8D dmi.modalias: dmi:bvnAppleInc.:bvr176.0.0.0.0:bd01/31/2020:svnAppleInc.:pniMac17,1:pvr1.0:rvnAppleInc.:rnMac-B809C3757DA9BB8D:rvriMac17,1:cvnAppleInc.:ct9:cvrMac-B809C3757DA9BB8D: dmi.product.family: iMac17,1 dmi.product.name: iMac17,1 dmi.product.version: 1.0 dmi.sys.vendor: Apple Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1874104/+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
