ubuntu-x-swat team mailing list archive

[Bryce Harrington <727620@xxxxxxxxxxxxxxxxxx>]

I've updated the title and description based on recent findings.

Hybrid graphics switching support is still fairly embryonic upstream and
I don't feel it is yet stable or reliable enough yet for us to support
in Ubuntu, so I am setting the importance of the X task here to
Wishlist.

However, even aside from switching graphics, the kernel should not be
failing with this particular hardware configuration, even if it is not
able to properly switch; it should pick one driver or the other and not
load both, even if it just has to pick at random.  So I'm leaving the
kernel task here open, in hopes that some fix can at least paper over
the crash.

** Description changed:

- Binary package hint: xserver-xorg-video-ati
+ [Problem]
+ On hybrid graphics hardware with this ATI chip and another (e.g. Intel), a failure occurs resulting in a black screen and errors from the radeon kernel module, as shown below.
  
- I'm running natty, and every since the upgrade to 6.14.0 I've been
- unable to consistently boot.  After some discussion in the forums, I
- tried repeatedly to boot into recovery mode.  In most cases, I got a
- black screen.  One time though, when I was able to successfully increase
- the brightness, I saw some errors from the radeon module.  I took a
- photo (available at http://i.imgur.com/P0bQ0.jpg), and here's the stack
- and call trace, as best as I can read it:
+ [Cause]
+ From upstream developer:
+ 
+ "The switcheroo code needs more work to switch properly on some systems
+ it seems.  There are a set acpi methods required to  activate/deactivate
+ the respective gpus.  The drivers need to load and initialize active hw.
+ If the hw is not active when the driver loads, then the hw is not set up
+ properly and it won't work.  Probably some ordering issues in how the
+ switcheroo acpi methods are called."
+ 
+ [Workarounds]
+ Several options:
+ 
+ 1. If your BIOS includes functionality to disable the Intel card, use
+ BIOS settings to select which chip to load.
+ 
+ 2. Disable KMS by adding `radeon.modeset=0` in the boot line.  Note that
+ the default radeon gallium driver only works with KMS, so YMMV.
+ 
+ [Original Report]
+ I'm running natty, and every since the upgrade to 6.14.0 I've been unable to consistently boot.  After some discussion in the forums, I tried repeatedly to boot into recovery mode.  In most cases, I got a black screen.  One time though, when I was able to successfully increase the brightness, I saw some errors from the radeon module.  I took a photo (available at http://i.imgur.com/P0bQ0.jpg), and here's the stack and call trace, as best as I can read it:
  
  Stack:
-  ffff880149eb8000 ffff880149eb8000 0000000000000011 0000000000000911
-  00000000fffffff4 ffff88014b6c7800 ffff88014b0f7b58 ffffffffa022aba0
-  ffff8801460f7b58 ffff880149eb8000 0000000000000000 0000000000410028
+  ffff880149eb8000 ffff880149eb8000 0000000000000011 0000000000000911
+  00000000fffffff4 ffff88014b6c7800 ffff88014b0f7b58 ffffffffa022aba0
+  ffff8801460f7b58 ffff880149eb8000 0000000000000000 0000000000410028
  Call Trace:
-  [<ffffffffa022aba0>] evergreen_cp_resume+0x3a0/0x630 [radeon]
-  [<ffffffffa022c8b7>] evergreen_startup+0x157/0x260 [radeon]
-  [<ffffffffa01fe8a0>] ? r600_pcie_gart_init+0x60/0x70 [radeon]
-  [<ffffffffa022dbec>] evergreen_init+0x1ac/0x2d0 [radeon]
-  [<ffffffffa01a5a69>] radeon_device_init+0x409/0x490 [radeon]
-  [<ffffffffa01a7142>] radeon_driver_load_kms+0xb2/0x1a0 [radeon]
-  [<ffffffffa007fb2e>] drm_get_pci_dev+0x18e/0x300 [drm]
-  [<ffffffff8115426f>] ? kmem_cache_alloc_trace+0xff/0x120
-  [<ffffffffa023790e>] radeon_pci_probe+0xb2/0xba [radeon]
-  [<ffffffff812fea7f>] local_pci_probe+0x5f/0xd0
-  [<ffffffff81300369>] pci_device_probe+0x119/0x120
-  [<ffffffff813b8eca>] ? driver_sysfs_add+0x7a/0xb0
-  [<ffffffff813b8ff8>] really_probe+0x68/0x190
-  [<ffffffff813b9305>] driver_probe_device+0x45/0x70
-  [<ffffffff813b93db>] __driver_attach+0xab/0xb0
-  [<ffffffff813b9330>] ? __driver_attach+0x0/0xb0
-  [<ffffffff813b817e>] bus_for_each_dev+0x5e/0x90
-  [<ffffffff813b8e4e>] driver_attach+0x1e/0x20
-  [<ffffffff813b89b5>] bus_add_driver+0xc5/0x280
-  [<ffffffffa0013000>] ? radeon_init+0x0/0x1000 [radeon]
-  [<ffffffff813b9676>] driver_register+0x76/0x140
-  [<ffffffffa0013000>] ? radeon_init+0x0/0x1000 [radeon]
-  [<ffffffff812ff126>] __pci_register_driver+0x56/0xd0
-  [<ffffffffa0080044>] drm_pci_init+0xe4/0xf0 [drm]
-  [<ffffffff815bf36e>] ? mutex_lock+0x1e/0x50
-  [<ffffffffa0013000>] ? radeon_init+0x0/0x1000 [radeon]
-  [<ffffffffa0077688>] drm_init+0x58/0x70 [drm]
-  [<ffffffffa00130c4>] radeon_init+0xc4/0x1000 [radeon]
-  [<ffffffff81002195>] do_one_initcall+0x45/0x190
-  [<ffffffff810a4573>] sys_init_module+0x103/0x260
-  [<ffffffff8100c002>] system_call_fastpath+0x16/0x1b
+  [<ffffffffa022aba0>] evergreen_cp_resume+0x3a0/0x630 [radeon]
+  [<ffffffffa022c8b7>] evergreen_startup+0x157/0x260 [radeon]
+  [<ffffffffa01fe8a0>] ? r600_pcie_gart_init+0x60/0x70 [radeon]
+  [<ffffffffa022dbec>] evergreen_init+0x1ac/0x2d0 [radeon]
+  [<ffffffffa01a5a69>] radeon_device_init+0x409/0x490 [radeon]
+  [<ffffffffa01a7142>] radeon_driver_load_kms+0xb2/0x1a0 [radeon]
+  [<ffffffffa007fb2e>] drm_get_pci_dev+0x18e/0x300 [drm]
+  [<ffffffff8115426f>] ? kmem_cache_alloc_trace+0xff/0x120
+  [<ffffffffa023790e>] radeon_pci_probe+0xb2/0xba [radeon]
+  [<ffffffff812fea7f>] local_pci_probe+0x5f/0xd0
+  [<ffffffff81300369>] pci_device_probe+0x119/0x120
+  [<ffffffff813b8eca>] ? driver_sysfs_add+0x7a/0xb0
+  [<ffffffff813b8ff8>] really_probe+0x68/0x190
+  [<ffffffff813b9305>] driver_probe_device+0x45/0x70
+  [<ffffffff813b93db>] __driver_attach+0xab/0xb0
+  [<ffffffff813b9330>] ? __driver_attach+0x0/0xb0
+  [<ffffffff813b817e>] bus_for_each_dev+0x5e/0x90
+  [<ffffffff813b8e4e>] driver_attach+0x1e/0x20
+  [<ffffffff813b89b5>] bus_add_driver+0xc5/0x280
+  [<ffffffffa0013000>] ? radeon_init+0x0/0x1000 [radeon]
+  [<ffffffff813b9676>] driver_register+0x76/0x140
+  [<ffffffffa0013000>] ? radeon_init+0x0/0x1000 [radeon]
+  [<ffffffff812ff126>] __pci_register_driver+0x56/0xd0
+  [<ffffffffa0080044>] drm_pci_init+0xe4/0xf0 [drm]
+  [<ffffffff815bf36e>] ? mutex_lock+0x1e/0x50
+  [<ffffffffa0013000>] ? radeon_init+0x0/0x1000 [radeon]
+  [<ffffffffa0077688>] drm_init+0x58/0x70 [drm]
+  [<ffffffffa00130c4>] radeon_init+0xc4/0x1000 [radeon]
+  [<ffffffff81002195>] do_one_initcall+0x45/0x190
+  [<ffffffff810a4573>] sys_init_module+0x103/0x260
+  [<ffffffff8100c002>] system_call_fastpath+0x16/0x1b
  Code: 00 45 8b 84 24 e4 0a 00 00 45 85 c0 0f 8e c7 09 00 00 41 8b 84 24 d4 0a 00 00 89 c2 83 c0 01 40 c1 e2 02 49 03 94 24 c8 0a 00 00 <c7> 02 00 44 05 c0 41 8b 94 24 e4 0a 00 00 41 23 84 24 f4 0a 00
  RIP  [<ffffffffa0227ad7>] evergreen_cp_start+0x57/0xc80 [radeon]
-  RSP <ffff88014b0f7af8>
+  RSP <ffff88014b0f7af8>
  CRZ: ffffc90411ce1ffc
  ---[ end trace 37702c56f2e23247 ]---
  udevd-work[94]: '/sbin/modprobe -bv pci:v00001002d000068C1sv0000103Csd00001436bc03sc00i00' unexpected exit with status 0x0009
  
  There is also some register info dumped at the top of the screen visible
  in the photo, that I didn't bother to write, as I'd most certainly get
  something wrong.

** Summary changed:

- [Radeon HD 5650 and 5470] Driver crash during recovery boot and in normal boot (Regression from 2.6.38-3 to -4)
+ [Radeon HD 5650 and 5470] Driver crash during recovery boot and in normal boot (Hybrid graphics)

** Changed in: xserver-xorg-video-ati (Ubuntu)
   Importance: High => Wishlist

** Changed in: xserver-xorg-video-ati (Ubuntu)
       Status: Confirmed => Triaged

** Summary changed:

- [Radeon HD 5650 and 5470] Driver crash during recovery boot and in normal boot (Hybrid graphics)
+ [Radeon HD 5650 and 5470] Kernel BUG during recovery boot and in normal boot (Hybrid graphics)

** Changed in: linux (Ubuntu)
   Importance: Undecided => High

-- 
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https://bugs.launchpad.net/bugs/727620

Title:
  [Radeon HD 5650 and 5470] Kernel BUG during recovery boot and in
  normal boot (Hybrid graphics)