Kernel "soft lockup" on X-startup after disabling radeon card

[Konstantinos Filios]

I installed Kubuntu 13.10 64bit just yesterday. I have a Dell Inspiron 15R with switchable graphics (AMD Radeon HD 7700M Series ). After running all post-installation software updates, I installed the graphics drivers using your howto:

sudo apt-get install fglrx fglrx-pxpress

Everything went fine, then I hit the Catalyst Control Center to turn off the discrete GPU and switch to integrated intel card.

From that point, whenever I boot the system or restart X, I get a 22-second soft lockup, accompanied by this dmesg output:

[ 6.832151] fglrx_pci 0000:01:00.0: irq 48 for MSI/MSI-X
[ 6.832602] <6>[fglrx] Firegl kernel thread PID: 1294
[ 6.832774] <6>[fglrx] Firegl kernel thread PID: 1295
[ 6.832968] <6>[fglrx] Firegl kernel thread PID: 1296
[ 6.833050] <6>[fglrx] IRQ 48 Enabled
[ 6.841661] <6>[fglrx] Reserved FB block: Shared offset:0, size:1000000
[ 6.841663] <6>[fglrx] Reserved FB block: Unshared offset:f87c000, size:484000
[ 6.841665] <6>[fglrx] Reserved FB block: Unshared offset:7ffee000, size:12000
[ 6.948220] <6>[fglrx] IRQ 48 Disabled
[ 6.948832] <6>[fglrx] module unloaded - fglrx 13.10.10 [May 23 2013]
[ 6.966295] AMD IOMMUv2 driver by Joerg Roedel <email address hidden>
[ 6.966298] AMD IOMMUv2 functionality not available on this system
[ 6.975837] <6>[fglrx] Maximum main memory to use for locked dma buffers: 7629 MBytes.
[ 6.975977] <6>[fglrx] vendor: 1002 device: 682f count: 1
[ 6.976132] <6>[fglrx] ioport: bar 4, base 0x3000, size: 0x100
[ 6.976222] <6>[fglrx] Kernel PAT support is enabled
[ 6.976234] <6>[fglrx] module loaded - fglrx 13.10.10 [May 23 2013] with 1 minors
[ 8.243150] fglrx_pci 0000:01:00.0: irq 48 for MSI/MSI-X
[ 8.243562] <6>[fglrx] Firegl kernel thread PID: 1391
[ 8.243652] <6>[fglrx] Firegl kernel thread PID: 1392
[ 8.243743] <6>[fglrx] Firegl kernel thread PID: 1393
[ 8.243812] <6>[fglrx] IRQ 48 Enabled
[ 8.252019] <6>[fglrx] Reserved FB block: Shared offset:0, size:1000000
[ 8.252021] <6>[fglrx] Reserved FB block: Unshared offset:f87c000, size:484000
[ 8.252022] <6>[fglrx] Reserved FB block: Unshared offset:7ffee000, size:12000
[ 9.040511] <6>[fglrx] IRQ 48 Disabled
[ 36.207615] BUG: soft lockup - CPU#5 stuck for 22s! [modprobe:1415]
[ 36.207618] Modules linked in: fglrx(POF-) amd_iommu_v2 i8k parport_pc ppdev rfcomm bnep x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm crct10dif_pclmul arc4 crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 iwldvm lrw gf128mul glue_helper ablk_helper cryptd dell_wmi mac80211 sparse_keymap snd_hda_codec_hdmi uvcvideo snd_hda_codec_conexant dell_laptop snd_hda_intel rts5139(C) videobuf2_vmalloc dcdbas videobuf2_memops snd_hda_codec videobuf2_core videodev snd_hwdep snd_pcm joydev snd_page_alloc snd_seq_midi iwlwifi snd_seq_midi_event snd_rawmidi cfg80211 snd_seq btusb snd_seq_device mei_me snd_timer mei microcode lpc_ich snd soundcore bluetooth binfmt_misc psmouse mac_hid serio_raw lp parport usb_storage hid_generic usbhid hid i915 i2c_algo_bit drm_kms_helper ahci r8169 drm libahci mii wmi video [last unloaded: amd_iommu_v2]
[ 36.207664] CPU: 5 PID: 1415 Comm: modprobe Tainted: PF C O 3.11.0-17-generic #31-Ubuntu
[ 36.207665] Hardware name: Dell Inc. Inspiron 7520/0PXH02, BIOS A09 11/15/2012
[ 36.207666] task: ffff88024ef58000 ti: ffff880251272000 task.ti: ffff880251272000
[ 36.207667] RIP: 0010:[<ffffffff8136a682>] [<ffffffff8136a682>] delay_tsc+0x32/0x80
[ 36.207673] RSP: 0018:ffff880251273c38 EFLAGS: 00000287
[ 36.207674] RAX: 00000000000007ca RBX: 0000000000000001 RCX: 00000000010bf078
[ 36.207675] RDX: 00000000d7f02ea6 RSI: 000000000000311a RDI: 0000000000000882
[ 36.207675] RBP: ffff880251273c50 R08: 0000000000000001 R09: ffff880251273cd8
[ 36.207676] R10: ffff88024ff3e000 R11: ffff88024f849c00 R12: ffff88024ff3e000
[ 36.207677] R13: ffff88024f849c00 R14: 0000000000010000 R15: ffff880251273d88
[ 36.207678] FS: 00007fa5d456d740(0000) GS:ffff88025f340000(0000) knlGS:0000000000000000
[ 36.207679] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 36.207680] CR2: 00007fa5d4597f30 CR3: 0000000252ee9000 CR4: 00000000001407e0
[ 36.207681] Stack:
[ 36.207682] 0000000000298190 0000000000000bb8 000000000000000a ffff880251273c60
[ 36.207684] ffffffff8136a600 ffff880251273c88 ffffffffa09461bc 0000000000000bb8
[ 36.207686] 000000000000000a 0000000000298190 ffff880251273cd8 ffffffffa0966086
[ 36.207687] Call Trace:
[ 36.207690] [<ffffffff8136a600>] __udelay+0x30/0x40
[ 36.207724] [<ffffffffa09461bc>] KCL_DelayInMicroSeconds+0x1c/0x80 [fglrx]
[ 36.207753] [<ffffffffa0966086>] MCIL_WaitFor+0x46/0x70 [fglrx]
[ 36.207789] [<ffffffffa0999668>] ? Cail_MCILWaitFor+0xe8/0x160 [fglrx]
[ 36.207824] [<ffffffffa09996e0>] Cail_MCILWaitFor+0x160/0x160 [fglrx]
[ 36.207863] [<ffffffffa09b7552>] ? update_medium_grain_clock_gating+0x302/0x320 [fglrx]
[ 36.207900] [<ffffffffa09b85da>] ? Cail_CapeVerde_SetVcePowerGating+0x12a/0x1c0 [fglrx]
[ 36.207937] [<ffffffffa09b8874>] ? Cail_CapeVerde_ClockGatingControl+0x204/0x220 [fglrx]
[ 36.207974] [<ffffffffa09ba2f7>] ? perform_disable_clock_gating+0x87/0xc0 [fglrx]
[ 36.208011] [<ffffffffa09ba220>] ? perform_power_control+0x50/0xa0 [fglrx]
[ 36.208048] [<ffffffffa09babe5>] ? Cail_DisablePowerGatingClockGating+0x25/0x40 [fglrx]
[ 36.208081] [<ffffffffa098be28>] ? CAILExit+0x68/0x180 [fglrx]
[ 36.208109] [<ffffffffa0961135>] ? firegl_cail_free+0x45/0x80 [fglrx]
[ 36.208135] [<ffffffffa0954275>] ? cleanup_device+0x35/0x2a0 [fglrx]
[ 36.208139] [<ffffffff816ee85e>] ? _raw_spin_lock+0xe/0x20
[ 36.208165] [<ffffffffa09571d5>] ? firegl_cleanup_device_heads+0x65/0xa0 [fglrx]
[ 36.208216] [<ffffffffa0b0b88d>] ? firegl_cleanup_module+0x99/0x16c [fglrx]
[ 36.208219] [<ffffffff810ca0cb>] ? SyS_delete_module+0x16b/0x2d0
[ 36.208221] [<ffffffff816f2cec>] ? do_page_fault+0x2c/0x50
[ 36.208224] [<ffffffff816f74dd>] ? system_call_fastpath+0x1a/0x1f
[ 36.208225] Code: 89 e5 41 55 41 54 41 89 fc 53 65 44 8b 2c 25 64 b0 00 00 66 66 90 0f ae e8 e8 eb f7 ca ff 66 90 89 c3 eb 14 0f 1f 44 00 00 f3 90 <65> 8b 04 25 64 b0 00 00 41 39 c5 75 1d 66 66 90 0f ae e8 e8 c6
[ 51.668911] <6>[fglrx] module unloaded - fglrx 13.10.10 [May 23 2013]
---
ApportVersion: 2.12.5-0ubuntu2.2
Architecture: amd64
DistroRelease: Ubuntu 13.10
InstallationDate: Installed on 2014-02-21 (0 days ago)
InstallationMedia: Kubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
MarkForUpload: True
Package: fglrx-pxpress 0.4
PackageArchitecture: all
ProcVersionSignature: Ubuntu 3.11.0-17.31-generic 3.11.10.3
Tags: saucy
Uname: Linux 3.11.0-17-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[Konstantinos Filios (konfilios)]

apport information

[Konstantinos Filios (konfilios)]

apport information

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[aimlessbydesign (aimlessdesigns)]

AMD64bit install plagued with soft lock CPU on boot up. Sometimes I can boot into the desktop and everything seems fine. Other times I'll get into the desktop and everything locks up immediately. Most of the time, however, I cannot even fully boot. Bootup gets stuck with CPU Soft Lock on several cores. I tried boot loooping and can hardly get 2 successful boots in a row.

Processor is AMD FX 8120. 8 GB of Ram. Installed on several hard drives with same problem.

Tried clean install. Tried upgrading from 13.04. Tried installing 13.10 server. All have same issue.

13.10 works fine on my intel macbook pro.

What information can I add?

[aimlessbydesign (aimlessdesigns)]

Graphics card Nvidia Geforce 550ti. I tried with and without nvidia-current. No change in behavior.