Hi,
On 3.6, I've got a problem with my video driver after resuming from suspend-to-disk: the lower part of the display flickers, rapidly but irregularly (think of a neon sign in a bad film noir), flicking between the correct display and... something else, it's hard to see what.
Shutting the lid of the machine (to trigger a suspend-to-ram) and waking it up again fixes the flicker.
In syslogs, I have nothing obvious on suspend, and this warning on resume:
Oct 4 19:53:04 ruth kernel: [ 2892.184086] ------------[ cut here ]------------ Oct 4 19:53:04 ruth kernel: [ 2892.184114] WARNING: at drivers/gpu/drm/i915/intel_display.c:1225 intel_crtc_disable+0x52/0x86 [i915]() Oct 4 19:53:04 ruth kernel: [ 2892.184115] Hardware name: 0196CTO Oct 4 19:53:04 ruth kernel: [ 2892.184117] pipe B assertion failure (expected off, current on) Oct 4 19:53:04 ruth kernel: [ 2892.184188] Modules linked in: cpufreq_powersave cpufreq_userspace cpufreq_stats cpufreq_conservative rfcomm bnep binfmt_misc uinput nfsd auth_rpcgss nfs_acl nfs lockd fscache sunrpc ext4 jbd2 mbcache loop arc4 iwldvm mac80211 snd_hda_codec_hdmi snd_hda_codec_conexant coretemp i915 snd_hda_intel snd_hda_codec drm_kms_helper iwlwifi snd_hwdep snd_pcm snd_page_alloc joydev snd_seq snd_seq_device snd_timer kvm_intel drm i2c_algo_bit thinkpad_acpi acpi_cpufreq nvram btusb bluetooth kvm crc16 cfg80211 microcode psmouse evdev i2c_i801 video rfkill wmi mperf i2c_core snd battery ac processor soundcore button btrfs crc32c libcrc32c zlib_deflate sha256_generic ablk_helper cryptd aes_x86_64 aes_generic cbc dm_crypt dm_mod sd_mod crc_t10dif ums_realtek usb_storage uas thermal thermal_sys ahci libahci libata uhci_hcd scsi_mod ehci_hcd r8169 mii usbcore usb_common Oct 4 19:53:04 ruth kernel: [ 2892.184198] Pid: 4117, comm: kworker/u:3 Not tainted 3.6.0 #14 Oct 4 19:53:04 ruth kernel: [ 2892.184199] Call Trace: Oct 4 19:53:04 ruth kernel: [ 2892.184207] [<ffffffff8102bdc5>] ? warn_slowpath_common+0x78/0x8c Oct 4 19:53:04 ruth kernel: [ 2892.184213] [<ffffffff8104afd3>] ? async_schedule+0xc/0xc Oct 4 19:53:04 ruth kernel: [ 2892.184216] [<ffffffff8102be71>] ? warn_slowpath_fmt+0x45/0x4a Oct 4 19:53:04 ruth kernel: [ 2892.184221] [<ffffffff8104afd3>] ? async_schedule+0xc/0xc Oct 4 19:53:04 ruth kernel: [ 2892.184238] [<ffffffffa03fdae0>] ? intel_crtc_disable+0x52/0x86 [i915] Oct 4 19:53:04 ruth kernel: [ 2892.184245] [<ffffffffa0273e47>] ? drm_helper_disable_unused_functions+0xd0/0xfb [drm_kms_helper] Oct 4 19:53:04 ruth kernel: [ 2892.184250] [<ffffffffa027461e>] ? drm_helper_resume_force_mode+0xf1/0xff [drm_kms_helper] Oct 4 19:53:04 ruth kernel: [ 2892.184254] [<ffffffff8104afd3>] ? async_schedule+0xc/0xc Oct 4 19:53:04 ruth kernel: [ 2892.184264] [<ffffffffa03dc17f>] ? i915_drm_thaw+0xd4/0x10b [i915] Oct 4 19:53:04 ruth kernel: [ 2892.184274] [<ffffffffa03dc4fc>] ? i915_resume+0x3b/0x50 [i915] Oct 4 19:53:04 ruth kernel: [ 2892.184279] [<ffffffff81193f21>] ? pci_legacy_resume+0x39/0x39 Oct 4 19:53:04 ruth kernel: [ 2892.184284] [<ffffffff812196f7>] ? dpm_run_callback.isra.5+0x26/0x54 Oct 4 19:53:04 ruth kernel: [ 2892.184289] [<ffffffff81219fe1>] ? device_resume+0xd0/0x110 Oct 4 19:53:04 ruth kernel: [ 2892.184292] [<ffffffff8121a035>] ? async_resume+0x14/0x38 Oct 4 19:53:04 ruth kernel: [ 2892.184296] [<ffffffff8104b070>] ? async_run_entry_fn+0x9d/0x175 Oct 4 19:53:04 ruth kernel: [ 2892.184300] [<ffffffff81041a1a>] ? process_one_work+0x184/0x2a3 Oct 4 19:53:04 ruth kernel: [ 2892.184304] [<ffffffff810426f1>] ? worker_thread+0x1fe/0x29f Oct 4 19:53:04 ruth kernel: [ 2892.184307] [<ffffffff810424f3>] ? manage_workers+0x223/0x223 Oct 4 19:53:04 ruth kernel: [ 2892.184310] [<ffffffff810424f3>] ? manage_workers+0x223/0x223 Oct 4 19:53:04 ruth kernel: [ 2892.184315] [<ffffffff81045adf>] ? kthread+0x67/0x6f Oct 4 19:53:04 ruth kernel: [ 2892.184319] [<ffffffff812fe774>] ? kernel_thread_helper+0x4/0x10 Oct 4 19:53:04 ruth kernel: [ 2892.184324] [<ffffffff81045a78>] ? kthread_freezable_should_stop+0x3c/0x3c Oct 4 19:53:04 ruth kernel: [ 2892.184327] [<ffffffff812fe770>] ? gs_change+0xb/0xb Oct 4 19:53:04 ruth kernel: [ 2892.184328] ---[ end trace 4e63ed9ed8ebc493 ]---
Hardware is a Lenovo Thinkpad Edge13, lspci says:
00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07)
aka
00:02.0 0300: 8086:2a42 (rev 07)
Let me know if you need more information. I can probably manage a bisect if necessary -- it's easily repeatable as a bug.
Hugo.