Attachment 117653 Details for Bug 91618 – The patch to fix the problem

The patch to fix the problem

0001-drm-i915-gen3-work-around-hang-during-hibernation.patch (text/plain), 1.90 KB, created by Eugene A. Shatokhin on 2015-08-12 17:05:09 UTC

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Creator: Eugene A. Shatokhin

Created: 2015-08-12 17:05:09 UTC

Size: 1.90 KB

patch

obsolete

>From 20a7dbb5a4935e3f37ceeebd72fa5c21b3db0430 Mon Sep 17 00:00:00 2001
>From: Eugene Shatokhin <eugene.shatokhin@rosalab.ru>
>Date: Wed, 12 Aug 2015 19:47:25 +0300
>Subject: [PATCH] drm/i915: gen3: work around hang during hibernation
>
>On ASUS EeePC 1015PE with kernel 3.18 and newer, there is a problem
>very similar to the one fixed for Lenovo by commit ab3be73fa7b4
>("drm/i915: gen4: work around hang during hibernation").
>
>The laptop has Atom N455 CPU and an integrated graphics controller (PCI
>ID: 8086-a011-1043-83ac) managed by i915 module.
>
>When I try to put the system to hibernation, the hibernation image is
>created, the screen turns off but the laptop does not turn off after
>that (the fan continues to work, the leds are on, etc.) and the system
>seems to hang.
>
>This patch fixes the problem.
>
>Signed-off-by: Eugene Shatokhin <eugene.shatokhin@rosalab.ru>
>---
> drivers/gpu/drm/i915/i915_drv.c | 14 ++++++++++----
> 1 file changed, 10 insertions(+), 4 deletions(-)
>
>diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
>index 884b4f9..4de24b6 100644
>--- a/drivers/gpu/drm/i915/i915_drv.c
>+++ b/drivers/gpu/drm/i915/i915_drv.c
>@@ -689,11 +689,17 @@ static int i915_drm_suspend_late(struct drm_device *drm_dev, bool hibernation)
> 	 * power down the device properly. Platforms where this was seen:
> 	 * Lenovo Thinkpad X301, X61s
> 	 */
>-	if (!(hibernation &&
>-	      drm_dev->pdev->subsystem_vendor == PCI_VENDOR_ID_LENOVO &&
>-	      INTEL_INFO(dev_priv)->gen == 4))
>-		pci_set_power_state(drm_dev->pdev, PCI_D3hot);
>+	if (hibernation &&
>+	    drm_dev->pdev->subsystem_vendor == PCI_VENDOR_ID_LENOVO &&
>+	    INTEL_INFO(dev_priv)->gen == 4)
>+		return 0;
>+
>+	/* A similar problem was found on some ASUS systems with GEN3. */
>+	if (drm_dev->pdev->subsystem_vendor == PCI_VENDOR_ID_ASUSTEK &&
>+	    INTEL_INFO(dev_priv)->gen == 3)
>+		return 0;
> 
>+	pci_set_power_state(drm_dev->pdev, PCI_D3hot);
> 	return 0;
> }
> 
>-- 
>2.3.2
>

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