i915: screen goes white, red, green or blue during suspend/resume or hibernation

[Colin Ian King]

Hardy kernel: i915 driver does not save/restore the AR and CR registers (AR14 in particular), and the screen goes white, red, green or blue during suspend/resume or hibernate cycles.

This is fixed with upstream commit 39273b58a409cd6d65c9732bdca00bacd1626672 (which flips the ARX register into index mode before restoring the AR registers) and commit a59e122a67b88925944d3bbf33d15229cf0fc3de (fix an off-by one save/restore index bug for the AR and CR registers)

[Colin Ian King (colin-king)]

Hardy SRU justification:

Impact: i915 video driver: screen goes white, red, green or blue during
suspend/resume or hibernation

Fix: Backport upstream commits 39273b58a409cd6d65c9732bdca00bacd1626672
and a59e122a67b88925944d3bbf33d152

These commits fix flips the ARX register into index mode before
restoring the AR registers fix an off-by one save/restore index bug for
the AR and CR registers.

Testcase: Without the attached patch, the screen occasionally goes
completely white, red, green or blue during suspend/resume and
hibernate. With patch the problem does not occur.

[Steve Langasek (vorlon)]

Accepted into hardy-proposed, please test and give feedback here. Please see https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you in advance!

[Danilo Piazzalunga (danilopiazza)]

I tried performing several hibernate/resume cycles on my machine. The screen used to go white some of the time; now the problem appears to be fixed.

I will perform more testing and report if anything still goes wrong.

[Leann Ogasawara (leannogasawara)]

These patches are already available in the 2.6.28-11.42 Jaunty kernel so I'm setting the actively developed linux task to Fix Released. For Hardy the kernel with these patches is still in hardy-proposed so I'll leave the Hardy nomination at Fix Committed. Thanks.

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux - 2.6.24-24.53

---------------
linux (2.6.24-24.53) hardy-proposed; urgency=low

  [Stefan Bader]

  * Rebuild of 2.6.24-24.51 with 2.6.24-23.52 security patches applied.

linux (2.6.24-24.51) hardy-proposed; urgency=low

  [Alessio Igor Bogani]

  * rt: Updated PREEMPT_RT support to rt27
    - LP: #324275

  [Steve Beattie]

  * fix apparmor memory leak on deleted file ops
    - LP: #329489

  [Upstream Kernel Changes]

  * KVM: MMU: Add locking around kvm_mmu_slot_remove_write_access()
    - LP: #335097, #333409
  * serial: 8250: fix shared interrupts issues with SMP and RT kernels
    - LP: #280821
  * 8250.c: port.lock is irq-safe
    - LP: #280821
  * ACPI: Clear WAK_STS on resume
    - LP: #251338

linux (2.6.24-24.50) hardy-proposed; urgency=low

  [Alok Kataria]

  * x86: add X86_FEATURE_HYPERVISOR feature bit
    - LP: #319945
  * x86: add a synthetic TSC_RELIABLE feature bit
    - LP: #319945
  * x86: vmware: look for DMI string in the product serial key
    - LP: #319945
  * x86: Hypervisor detection and get tsc_freq from hypervisor
    - LP: #319945
  * x86: Use the synthetic TSC_RELIABLE bit to workaround virtualization
    anomalies.
    - LP: #319945
  * x86: Skip verification by the watchdog for TSC clocksource.
    - LP: #319945
  * x86: Mark TSC synchronized on VMware.
    - LP: #319945

  [Colin Ian King]

  * SAUCE: Bluetooth USB: fix kernel panic during suspend while streaming
    audio to bluetooth headset
    - LP: #331106

  [James Troup]

  * XEN: Enable architecture specific get_unmapped_area_topdown
    - LP: #237724

  [Stefan Bader]

  * Xen: Fix FTBS after Vmware TSC updates.
    - LP: #319945

  [Upstream Kernel Changes]

  * r8169: fix RxMissed register access
    - LP: #324760
  * r8169: Tx performance tweak helper
    - LP: #326891
  * r8169: use pci_find_capability for the PCI-E features
    - LP: #326891
  * r8169: add 8168/8101 registers description
    - LP: #326891
  * r8169: add hw start helpers for the 8168 and the 8101
    - LP: #326891
  * r8169: additional 8101 and 8102 support
    - LP: #326891
  * Fix memory corruption in console selection
    - LP: #329007

linux (2.6.24-23.52) hardy-security; urgency=low

  [Stefan Bader]
  * rt: Fix FTBS caused by shm changes
    - CVE-2009-0859

  [Steve Beattie]

  * fix apparmor memory leak on deleted file ops
    - LP: #329489

  [Upstream Kernel Changes]

  * NFS: Remove the buggy lock-if-signalled case from do_setlk()
    - CVE-2008-4307
  * sctp: Avoid memory overflow while FWD-TSN chunk is received with bad
    stream ID
    - CVE-2009-0065
  * net: 4 bytes kernel memory disclosure in SO_BSDCOMPAT gsopt try #2
    - CVE-2009-0676
  * sparc: Fix mremap address range validation.
    - CVE-2008-6107
  * copy_process: fix CLONE_PARENT && parent_exec_id interaction
    - CVE-2009-0028
  * security: introduce missing kfree
    - CVE-2009-0031
  * eCryptfs: check readlink result was not an error before using it
    - CVE-2009-0269
  * dell_rbu: use scnprintf() instead of less secure sprintf()
    - CVE-2009-0322
  * drivers/net/skfp: if !capable(CAP_NET_ADMIN): inverted logic
    - CVE-2009-0675
  * Ext4: Fix online res...