linux-kernel - Re: resume problem with i915/drm

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Message-Id: <200808072208.05887.rjw@sisk.pl>
Date:	Thu, 7 Aug 2008 22:08:05 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Charles@...wieters.org
Cc:	linux-kernel@...r.kernel.org,
	Jesse Barnes <jbarnes@...tuousgeek.org>
Subject: Re: resume problem with i915/drm

On Wednesday, 6 of August 2008, Charles@...wieters.org wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> 
> Hi--
> 
>   I'm having a problem resuming (from RAM) if the i915 and drm modules
> are loaded (these are needed for running X on my machine). Vanilla
> kernel versions 2.6.25.x and 2.6.26.x. I get the same behavior with
> Debian linux-image-2.6.25-2-686 kernel. I can't believe I'm the first to
> encounter this.

Can you retest with 2.6.27-rc2, please?

> suspend-to-ram and resuming works fine with earlier kernels
> (e.g. 2.6.17), but I haven't tested exhaustively.
> 
> Possibly related is a failure in modprobe -r i915 after it is
> loaded. The message printed is
> 
> Aug  5 21:39:47 oaf kernel: WARNING: at fs/proc/generic.c:799 remove_proc_entry+0xf9/0x115()
> Aug  5 21:39:47 oaf kernel: Modules linked in: drm(-) binfmt_misc rfcomm l2cap bluetooth lp nfsd exportfs nfs lockd nfs_acl sunrpc deflate zlib_deflate zlib_inflate ctr twofish twofish_common camellia serpent blowfish des_generic cbc aes_i586 aes_generic xcbc sha256_generic sha1_generic md5 crypto_null af_key fuse dm_crypt crypto_blkcipher dm_snapshot dm_mirror dm_log dm_mod eeprom i2c_core snd_intel8x0 snd_ac97_codec ac97_bus snd_pcm_oss snd_pcm snd_mixer_oss snd_seq_dummy snd_seq_oss snd_seq_midi snd_rawmidi pcmcia crc32 snd_seq_midi_event snd_seq snd_timer snd_seq_device ipw2200 snd ieee80211 ieee80211_crypt soundcore 8250_pnp firmware_class yenta_socket rsrc_nonstatic 8250_pci snd_page_alloc pcspkr parport_pc psmouse 8250 pcmcia_core parport e100 serial_core cdrom iTCO_wdt fan bay dock ehci_hcd toshiba_acpi backlight thermal battery ac uhci_hcd processor button usbcore intel_agp agpgart unix [last unloaded: i915]
> Aug  5 21:39:47 oaf kernel: Pid: 3890, comm: modprobe Not tainted 2.6.26.1 #9
> Aug  5 21:39:47 oaf kernel:  [<c0114778>] warn_on_slowpath+0x40/0x79
> Aug  5 21:39:47 oaf kernel:  [<c0110b90>] check_preempt_wakeup+0x8f/0xc3
> Aug  5 21:39:47 oaf kernel:  [<c01220d5>] autoremove_wake_function+0xd/0x2d
> Aug  5 21:39:47 oaf kernel:  [<c010ff37>] __wake_up_common+0x2d/0x52
> Aug  5 21:39:47 oaf kernel:  [<c010ff6b>] __wake_up+0xf/0x15
> Aug  5 21:39:47 oaf kernel:  [<c0114cee>] wake_up_klogd+0x2b/0x2d
> Aug  5 21:39:47 oaf kernel:  [<c0144237>] vma_merge+0x1a3/0x23a
> Aug  5 21:39:47 oaf kernel:  [<c0179649>] remove_proc_entry+0xf9/0x115
> Aug  5 21:39:47 oaf kernel:  [<c014260c>] free_pgtables+0x67/0x7b
> Aug  5 21:39:47 oaf kernel:  [<dff46f7b>] drm_core_exit+0xc/0x2a [drm]
> Aug  5 21:39:47 oaf kernel:  [<c012df88>] sys_delete_module+0x193/0x1eb
> Aug  5 21:39:47 oaf kernel:  [<c014345b>] remove_vma+0x43/0x48
> Aug  5 21:39:47 oaf kernel:  [<c0144046>] do_munmap+0x1ba/0x1d4
> Aug  5 21:39:47 oaf kernel:  [<c0102a55>] sysenter_past_esp+0x6a/0x91
> Aug  5 21:39:47 oaf kernel:  =======================
> Aug  5 21:39:47 oaf kernel: ---[ end trace dd188b4354a41352 ]---
> 
> For 2.6.26.1, if I don't start X, I have the following list of modules
> 


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