Ubuntu 15.04 freezes for a second every 6-10 seconds, PCI/Radeon related messages in kern.log
Tonight I made a fresh install of Xubuntu 15.04 on my laptop, an Acer Aspire TimelineX 4820TG. I was running 14.04 LTS before, and all was fine. I didn't have lot of stuffs to save, so I went for a complete uninstall and fresh re-installation, in order to have a cleaner system.
Unfortunately I'm experiencing periodical freezes since first boot. The freeze occurs every 6-10 seconds and lasts about 1 second. During freeze mouse and keyboard are not responsive, and so it looks all the system. It is very annoying.
Additionally, I can hear fan speeds up every time the freeze occurs. And system hangs on shutdown (I had to long-press the power button).
I noticed that during every freeze these exact lines in /var/log/kern.log are printed:
[ 159.876643] snd_hda_intel 0000:01:00.1: Disabling via VGA-switcheroo
[ 160.097085] snd_hda_intel 0000:01:00.1: Cannot lock devices!
[ 160.844851] i915 0000:00:02.0: BAR 6: [??? 0x00000000 flags 0x2] has bogus alignment
[ 160.844866] pci 0000:00:1e.0: PCI bridge to [bus 04]
[ 160.844874] pci 0000:00:1e.0: bridge window [io 0x3000-0x3fff]
[ 160.844884] pci 0000:00:1e.0: bridge window [mem 0xd0000000-0xd01fffff]
[ 160.844891] pci 0000:00:1e.0: bridge window [mem 0xd0200000-0xd03fffff 64bit pref]
[ 161.686549] [drm] PCIE GART of 1024M enabled (table at 0x000000000025E000).
[ 161.686692] radeon 0000:01:00.0: WB enabled
[ 161.686698] radeon 0000:01:00.0: fence driver on ring 0 use gpu addr 0x0000000020000c00 and cpu addr 0xffff8800a7c78c00
[ 161.686702] radeon 0000:01:00.0: fence driver on ring 3 use gpu addr 0x0000000020000c0c and cpu addr 0xffff8800a7c78c0c
[ 161.687450] radeon 0000:01:00.0: fence driver on ring 5 use gpu addr 0x000000000005c418 and cpu addr 0xffffc9001a21c418
[ 161.704183] [drm] ring test on 0 succeeded in 1 usecs
[ 161.704196] [drm] ring test on 3 succeeded in 2 usecs
[ 161.880223] [drm] ring test on 5 succeeded in 1 usecs
[ 161.880231] [drm] UVD initialized successfully.
[ 161.880275] [drm] ib test on ring 0 succeeded in 0 usecs
[ 161.880313] [drm] ib test on ring 3 succeeded in 0 usecs
[ 162.030450] [drm] ib test on ring 5 succeeded
[ 162.048802] snd_hda_intel 0000:01:00.1: Enabling via VGA-switcheroo
[ 162.063426] [drm] radeon: finishing device.
[ 162.072813] [TTM] Finalizing pool allocator
[ 162.072823] [TTM] Finalizing DMA pool allocator
[ 162.072976] [TTM] Zone kernel: Used memory at exit: 0 kiB
[ 162.072983] [drm] radeon: ttm finalized
[ 162.072991] vga_switcheroo: disabled
[ 162.073830] vgaarb: device changed decodes: PCI:0000:00:02.0,olddecodes=none,decodes=io+mem:owns=io+mem
[ 162.116658] pci_bus 0000:01: busn_res: [bus 01] is released
[ 162.144719] pci_bus 0000:04: Allocating resources
[ 162.144741] i915 0000:00:02.0: BAR 6: [??? 0x00000000 flags 0x2] has bogus alignment
[ 162.144749] pci 0000:00:1e.0: PCI bridge to [bus 04]
[ 162.144756] pci 0000:00:1e.0: bridge window [io 0x3000-0x3fff]
[ 162.144763] pci 0000:00:1e.0: bridge window [mem 0xd0000000-0xd01fffff]
[ 162.144769] pci 0000:00:1e.0: bridge window [mem 0xd0200000-0xd03fffff 64bit pref]
[ 162.145274] i915 0000:00:02.0: BAR 6: [??? 0x00000000 flags 0x2] has bogus alignment
[ 162.145280] pci 0000:00:1e.0: PCI bridge to [bus 04]
[ 162.145285] pci 0000:00:1e.0: bridge window [io 0x3000-0x3fff]
[ 162.145293] pci 0000:00:1e.0: bridge window [mem 0xd0000000-0xd01fffff]
[ 162.145300] pci 0000:00:1e.0: bridge window [mem 0xd0200000-0xd03fffff 64bit pref]
[ 162.145373] i915 0000:00:02.0: BAR 6: [??? 0x00000000 flags 0x2] has bogus alignment
[ 162.145378] pci 0000:00:1e.0: PCI bridge to [bus 04]
[ 162.145384] pci 0000:00:1e.0: bridge window [io 0x3000-0x3fff]
[ 162.145392] pci 0000:00:1e.0: bridge window [mem 0xd0000000-0xd01fffff]
[ 162.145398] pci 0000:00:1e.0: bridge window [mem 0xd0200000-0xd03fffff 64bit pref]
[ 162.145466] i915 0000:00:02.0: BAR 6: [??? 0x00000000 flags 0x2] has bogus alignment
[ 162.145471] pci 0000:00:1e.0: PCI bridge to [bus 04]
[ 162.145476] pci 0000:00:1e.0: bridge window [io 0x3000-0x3fff]
[ 162.145485] pci 0000:00:1e.0: bridge window [mem 0xd0000000-0xd01fffff]
[ 162.145491] pci 0000:00:1e.0: bridge window [mem 0xd0200000-0xd03fffff 64bit pref]
[ 162.145518] i915 0000:00:02.0: BAR 6: [??? 0x00000000 flags 0x2] has bogus alignment
[ 162.145523] pci 0000:00:1e.0: PCI bridge to [bus 04]
[ 162.145528] pci 0000:00:1e.0: bridge window [io 0x3000-0x3fff]
[ 162.145536] pci 0000:00:1e.0: bridge window [mem 0xd0000000-0xd01fffff]
[ 162.145542] pci 0000:00:1e.0: bridge window [mem 0xd0200000-0xd03fffff 64bit pref]
[ 162.145731] pci_bus 0000:02: Allocating resources
[ 162.145772] pci_bus 0000:03: Allocating resources
[ 162.145789] i915 0000:00:02.0: BAR 6: [??? 0x00000000 flags 0x2] has bogus alignment
[ 162.145795] pci 0000:00:1e.0: PCI bridge to [bus 04]
[ 162.145800] pci 0000:00:1e.0: bridge window [io 0x3000-0x3fff]
[ 162.145808] pci 0000:00:1e.0: bridge window [mem 0xd0000000-0xd01fffff]
[ 162.145813] pci 0000:00:1e.0: bridge window [mem 0xd0200000-0xd03fffff 64bit pref]
[ 162.146003] i915 0000:00:02.0: BAR 6: [??? 0x00000000 flags 0x2] has bogus alignment
[ 162.146007] pci 0000:00:1e.0: PCI bridge to [bus 04]
[ 162.146012] pci 0000:00:1e.0: bridge window [io 0x3000-0x3fff]
[ 162.146018] pci 0000:00:1e.0: bridge window [mem 0xd0000000-0xd01fffff]
[ 162.146023] pci 0000:00:1e.0: bridge window [mem 0xd0200000-0xd03fffff 64bit pref]
[ 162.146175] [Firmware Bug]: Duplicate ACPI video bus devices for the same VGA controller, please try module parameter "video.allow_duplicates=1"if the current driver doesn't work.
[ 162.146196] pci 0000:00:01.0: [8086:0045] type 01 class 0x060400
[ 162.146242] pci 0000:00:01.0: PME# supported from D0 D3hot D3cold
[ 162.146501] pci 0000:01:00.0: [1002:68e0] type 00 class 0x030000
[ 162.146521] pci 0000:01:00.0: reg 0x10: [mem 0xe0000000-0xe7ffffff 64bit pref]
[ 162.146533] pci 0000:01:00.0: reg 0x18: [mem 0xdc400000-0xdc41ffff 64bit]
[ 162.146541] pci 0000:01:00.0: reg 0x20: [io 0x5000-0x50ff]
[ 162.146554] pci 0000:01:00.0: reg 0x30: [mem 0xfffe0000-0xffffffff pref]
[ 162.146593] pci 0000:01:00.0: supports D1 D2
[ 162.146665] vgaarb: device added: PCI:0000:01:00.0,decodes=io+mem,owns=none,locks=none
[ 162.146669] vgaarb: device changed decodes: PCI:0000:00:02.0,olddecodes=io+mem,decodes=none:owns=io+mem
[ 162.146700] pci 0000:01:00.1: [1002:aa68] type 00 class 0x040300
[ 162.146718] pci 0000:01:00.1: reg 0x10: [mem 0xdc420000-0xdc423fff 64bit]
[ 162.146786] pci 0000:01:00.1: supports D1 D2
[ 162.146830] pci 0000:01:00.1: System wakeup disabled by ACPI
[ 162.146899] pci 0000:00:01.0: PCI bridge to [bus 01]
[ 162.146904] pci 0000:00:01.0: bridge window [io 0x5000-0x5fff]
[ 162.146908] pci 0000:00:01.0: bridge window [mem 0xdc400000-0xdc4fffff]
[ 162.146914] pci 0000:00:01.0: bridge window [mem 0xe0000000-0xefffffff 64bit pref]
[ 162.146921] pci_bus 0000:01: Allocating resources
[ 162.146930] pci 0000:01:00.0: can't claim BAR 6 [mem 0xfffe0000-0xffffffff pref]: no compatible bridge window
[ 162.146936] i915 0000:00:02.0: BAR 6: [??? 0x00000000 flags 0x2] has bogus alignment
[ 162.146941] pci 0000:00:1e.0: PCI bridge to [bus 04]
[ 162.146945] pci 0000:00:1e.0: bridge window [io 0x3000-0x3fff]
[ 162.146951] pci 0000:00:1e.0: bridge window [mem 0xd0000000-0xd01fffff]
[ 162.146956] pci 0000:00:1e.0: bridge window [mem 0xd0200000-0xd03fffff 64bit pref]
[ 162.146967] pci 0000:01:00.0: BAR 6: assigned [mem 0xdc440000-0xdc45ffff pref]
[ 162.146970] pci 0000:00:01.0: PCI bridge to [bus 01]
[ 162.146972] pci 0000:00:01.0: bridge window [io 0x5000-0x5fff]
[ 162.146975] pci 0000:00:01.0: bridge window [mem 0xdc400000-0xdc4fffff]
[ 162.146978] pci 0000:00:01.0: bridge window [mem 0xe0000000-0xefffffff 64bit pref]
[ 162.147669] [drm] initializing kernel modesetting (CEDAR 0x1002:0x68E0 0x1025:0x0359).
[ 162.147692] [drm] register mmio base: 0xDC400000
[ 162.147694] [drm] register mmio size: 131072
[ 162.147697] vga_switcheroo: enabled
[ 162.147758] ATPX version 1, functions 0x000000bf
[ 162.179303] ATOM BIOS: Acer
[ 162.179384] radeon 0000:01:00.0: VRAM: 512M 0x0000000000000000 - 0x000000001FFFFFFF (512M used)
[ 162.179387] radeon 0000:01:00.0: GTT: 1024M 0x0000000020000000 - 0x000000005FFFFFFF
[ 162.179389] [drm] Detected VRAM RAM=512M, BAR=128M
[ 162.179390] [drm] RAM width 64bits DDR
[ 162.179491] [TTM] Zone kernel: Available graphics memory: 1856954 kiB
[ 162.179493] [TTM] Initializing pool allocator
[ 162.179497] [TTM] Initializing DMA pool allocator
[ 162.179521] [drm] radeon: 512M of VRAM memory ready
[ 162.179522] [drm] radeon: 1024M of GTT memory ready.
[ 162.179535] [drm] Loading CEDAR Microcode
[ 162.179542] [drm] Internal thermal controller with fan control
[ 162.184385] [drm] radeon: dpm initialized
[ 162.184499] [drm] GART: num cpu pages 262144, num gpu pages 262144
[ 162.187590] [drm] PCIE GART of 1024M enabled (table at 0x000000000025E000).
[ 162.187739] radeon 0000:01:00.0: WB enabled
[ 162.187743] radeon 0000:01:00.0: fence driver on ring 0 use gpu addr 0x0000000020000c00 and cpu addr 0xffff880099009c00
[ 162.187745] radeon 0000:01:00.0: fence driver on ring 3 use gpu addr 0x0000000020000c0c and cpu addr 0xffff880099009c0c
[ 162.188678] radeon 0000:01:00.0: fence driver on ring 5 use gpu addr 0x000000000005c418 and cpu addr 0xffffc90019f9c418
[ 162.188688] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[ 162.188689] [drm] Driver supports precise vblank timestamp query.
[ 162.188691] radeon 0000:01:00.0: radeon: MSI limited to 32-bit
[ 162.188731] radeon 0000:01:00.0: radeon: using MSI.
[ 162.188759] [drm] radeon: irq initialized.
[ 162.205589] [drm] ring test on 0 succeeded in 2 usecs
[ 162.205600] [drm] ring test on 3 succeeded in 5 usecs
[ 162.381860] [drm] ring test on 5 succeeded in 2 usecs
[ 162.381871] [drm] UVD initialized successfully.
[ 162.382330] [drm] ib test on ring 0 succeeded in 0 usecs
[ 162.382380] [drm] ib test on ring 3 succeeded in 0 usecs
[ 163.032446] [drm] ib test on ring 5 succeeded
[ 163.037787] [drm] Radeon Display Connectors
[ 163.037791] [drm] Connector 0:
[ 163.037793] [drm] LVDS-2
[ 163.037796] [drm] DDC: 0x6460 0x6460 0x6464 0x6464 0x6468 0x6468 0x646c 0x646c
[ 163.037797] [drm] Encoders:
[ 163.037799] [drm] LCD1: INTERNAL_UNIPHY
[ 163.037801] [drm] Connector 1:
[ 163.037802] [drm] HDMI-A-1
[ 163.037804] [drm] HPD1
[ 163.037807] [drm] DDC: 0x6430 0x6430 0x6434 0x6434 0x6438 0x6438 0x643c 0x643c
[ 163.037808] [drm] Encoders:
[ 163.037810] [drm] DFP1: INTERNAL_UNIPHY1
[ 163.037811] [drm] Connector 2:
[ 163.037813] [drm] VGA-2
[ 163.037816] [drm] DDC: 0x64d8 0x64d8 0x64dc 0x64dc 0x64e0 0x64e0 0x64e4 0x64e4
[ 163.037817] [drm] Encoders:
[ 163.037819] [drm] CRT1: INTERNAL_KLDSCP_DAC1
[ 163.156621] radeon 0000:01:00.0: No connectors reported connected with modes
[ 163.156628] [drm] Cannot find any crtc or sizes - going 1024x768
[ 163.157939] [drm] fb mappable at 0xE045F000
[ 163.157941] [drm] vram apper at 0xE0000000
[ 163.157941] [drm] size 3145728
[ 163.157942] [drm] fb depth is 24
[ 163.157943] [drm] pitch is 4096
[ 163.158075] radeon 0000:01:00.0: fb1: radeondrmfb frame buffer device
[ 163.158237] [drm] Initialized radeon 2.40.0 20080528 for 0000:01:00.0 on minor 2
[ 163.158403] snd_hda_intel 0000:01:00.1: Handle VGA-switcheroo audio client
[ 163.158605] pci_bus 0000:04: Allocating resources
[ 163.158623] i915 0000:00:02.0: BAR 6: [??? 0x00000000 flags 0x2] has bogus alignment
[ 163.158632] pci 0000:00:1e.0: PCI bridge to [bus 04]
[ 163.158638] pci 0000:00:1e.0: bridge window [io 0x3000-0x3fff]
[ 163.158645] pci 0000:00:1e.0: bridge window [mem 0xd0000000-0xd01fffff]
[ 163.158651] pci 0000:00:1e.0: bridge window [mem 0xd0200000-0xd03fffff 64bit pref]
[ 163.159292] i915 0000:00:02.0: BAR 6: [??? 0x00000000 flags 0x2] has bogus alignment
[ 163.159303] pci 0000:00:1e.0: PCI bridge to [bus 04]
[ 163.159310] pci 0000:00:1e.0: bridge window [io 0x3000-0x3fff]
[ 163.159321] pci 0000:00:1e.0: bridge window [mem 0xd0000000-0xd01fffff]
[ 163.159330] pci 0000:00:1e.0: bridge window [mem 0xd0200000-0xd03fffff 64bit pref]
[ 163.159432] i915 0000:00:02.0: BAR 6: [??? 0x00000000 flags 0x2] has bogus alignment
[ 163.159438] pci 0000:00:1e.0: PCI bridge to [bus 04]
[ 163.159444] pci 0000:00:1e.0: bridge window [io 0x3000-0x3fff]
[ 163.159454] pci 0000:00:1e.0: bridge window [mem 0xd0000000-0xd01fffff]
[ 163.159463] pci 0000:00:1e.0: bridge window [mem 0xd0200000-0xd03fffff 64bit pref]
[ 163.159562] i915 0000:00:02.0: BAR 6: [??? 0x00000000 flags 0x2] has bogus alignment
[ 163.159570] pci 0000:00:1e.0: PCI bridge to [bus 04]
[ 163.159577] pci 0000:00:1e.0: bridge window [io 0x3000-0x3fff]
[ 163.159588] pci 0000:00:1e.0: bridge window [mem 0xd0000000-0xd01fffff]
[ 163.159596] pci 0000:00:1e.0: bridge window [mem 0xd0200000-0xd03fffff 64bit pref]
[ 163.159633] i915 0000:00:02.0: BAR 6: [??? 0x00000000 flags 0x2] has bogus alignment
[ 163.159639] pci 0000:00:1e.0: PCI bridge to [bus 04]
[ 163.159646] pci 0000:00:1e.0: bridge window [io 0x3000-0x3fff]
[ 163.159655] pci 0000:00:1e.0: bridge window [mem 0xd0000000-0xd01fffff]
[ 163.159665] pci 0000:00:1e.0: bridge window [mem 0xd0200000-0xd03fffff 64bit pref]
[ 163.159912] pci_bus 0000:02: Allocating resources
[ 163.159961] pci_bus 0000:03: Allocating resources
[ 163.159983] i915 0000:00:02.0: BAR 6: [??? 0x00000000 flags 0x2] has bogus alignment
[ 163.159990] pci 0000:00:1e.0: PCI bridge to [bus 04]
[ 163.159997] pci 0000:00:1e.0: bridge window [io 0x3000-0x3fff]
[ 163.160008] pci 0000:00:1e.0: bridge window [mem 0xd0000000-0xd01fffff]
[ 163.160016] pci 0000:00:1e.0: bridge window [mem 0xd0200000-0xd03fffff 64bit pref]
[ 163.164586] input: HDA ATI HDMI HDMI/DP,pcm=3 as /devices/pci0000:00/0000:00:01.0/0000:01:00.1/sound/card1/input36
Searching for similar messages, I came across some tips, and I ended up trying boot option pci=noacpi first and noacpi later. They solve the problem, but unfortunately both make my USB mouse not working (I didn't tested for other external USB devices).
What's the problem here? Why 12.04 works flawlessly? How can I solve it while keep my mouse and other USB devices working?
Thank you.
UPDATE: After further researches, I found it can be related to the double switchable graphics on my laptop, which looks broken on 15.04 updated kernel:
https://bugs.freedesktop.org/show_bug.cgi?id=88927
https://bugzilla.kernel.org/show_bug.cgi?id=79701
I solved with the radeon.runpm=0 boot option, but now dynamic turn on/off of the discrete graphic card is not working, so my system is hotter and battery life is shorter.
After reporting my issue on the Xorg and the Linux kernel Bugzilla, I was invited to test a kernel patch (this is the patch, posted for this bug).
After compiling and installing the patched kernel, the problem looks gone, and the dynamic turn on/off of the discrete graphic card is working again.
I have to thanks kernel developers for pointing me to the right direction, but unfortunately this is not a quick and easy solution. I hope they can ship the fix soon in next kernel releases.