Comment 63 for bug 320813

I also found these nasty lines in my dmesg after testing with all three patches:

[ 759.736511] [drm:i915_get_vblank_counter] *ERROR* trying to get vblank count for disabled pipe 1

[ 779.816019] Corrupted low memory at ffff88000000d348 (d348 phys) = 400000000000
[ 779.816029] ------------[ cut here ]------------
[ 779.816032] WARNING: at /build/buildd/linux-2.6.28/arch/x86/kernel/setup.c:719 check_for_bios_corruption+0xdd/0xe0()
[ 779.816034] Memory corruption detected in low memory
[ 779.816035] Modules linked in: i915 drm binfmt_misc bnep ipt_MASQUERADE iptable_nat nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack ipt_REJECT xt_tcpudp iptable_filter ip_tables x_tables bridge stp kvm_intel kvm acpi_cpufreq input_polldev video output ppdev parport_pc lp parport joydev snd_hda_intel snd_pcm_oss snd_mixer_oss snd_pcm snd_seq_dummy snd_seq_oss snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device snd soundcore snd_page_alloc intel_agp usbhid psmouse iTCO_wdt pcspkr iTCO_vendor_support serio_raw pata_it8213 r8169 mii ehci_hcd uhci_hcd fbcon tileblit font bitblit softcursor fuse
[ 779.816078] Pid: 0, comm: swapper Not tainted 2.6.28-7-generic #20-Ubuntu
[ 779.816080] Call Trace:
[ 779.816081] <IRQ> [<ffffffff8024d857>] warn_slowpath+0xb7/0xf0
[ 779.816089] [<ffffffff8052217d>] ? usb_submit_urb+0xdd/0x270
[ 779.816093] [<ffffffff8067f320>] ? printk+0x67/0x6f
[ 779.816097] [<ffffffff8025980f>] ? __mod_timer+0xbf/0xe0
[ 779.816100] [<ffffffff802168dd>] check_for_bios_corruption+0xdd/0xe0
[ 779.816102] [<ffffffff802168e0>] ? periodic_check_for_corruption+0x0/0x40
[ 779.816105] [<ffffffff802168e9>] periodic_check_for_corruption+0x9/0x40
[ 779.816108] [<ffffffff80258db9>] run_timer_softirq+0x179/0x260
[ 779.816112] [<ffffffff8027066f>] ? clockevents_program_event+0x4f/0x90
[ 779.816114] [<ffffffff802539fc>] __do_softirq+0x9c/0x170
[ 779.816117] [<ffffffff80213d8c>] call_softirq+0x1c/0x30
[ 779.816120] [<ffffffff80214ffd>] do_softirq+0x5d/0xa0
[ 779.816123] [<ffffffff8025377d>] irq_exit+0x8d/0xa0
[ 779.816126] [<ffffffff80224828>] smp_apic_timer_interrupt+0x88/0xc0
[ 779.816129] [<ffffffff80213668>] apic_timer_interrupt+0x88/0x90
[ 779.816130] <EOI> [<ffffffff8022b866>] ? native_safe_halt+0x6/0x10
[ 779.816137] [<ffffffff804670ee>] ? acpi_safe_halt+0x3a/0x55
[ 779.816139] [<ffffffff80467c79>] ? acpi_idle_do_entry+0x1b/0x2b
[ 779.816142] [<ffffffff80467cf1>] ? acpi_idle_enter_c1+0x68/0x8d
[ 779.816145] [<ffffffff80571385>] ? cpuidle_idle_call+0xa5/0x100
[ 779.816148] [<ffffffff80210e85>] ? cpu_idle+0x65/0xc0
[ 779.816151] [<ffffffff8066dd7c>] ? rest_init+0x5c/0x70
[ 779.816153] ---[ end trace 8faa7fd8cd7a6ddd ]---
[ 906.658683] [drm:i915_get_vblank_counter] *ERROR* trying to get vblank count for disabled pipe 1
[ 912.087777] [drm:i915_get_vblank_counter] *ERROR* trying to get vblank count for disabled pipe 1
[ 938.758016] [drm:i915_get_vblank_counter] *ERROR* trying to get vblank count for disabled pipe 1