I have a Thinkpad L520 which had this problem in 12.10. I have also had
this problem on an Asus machine a while back. I tried the solution I
found for the Asus on my Thinkpad and it worked. This is what I did:
Create a file /etc/pm/sleep.d/20_custom_ehci_hcd containing:
#!/bin/sh
# File: "/etc/pm/sleep.d/20_custom-ehci_hcd".
case "${1}" in
hibernate|suspend)
# Unbind ehci_hcd for first device 0000:00:1a.0:
echo -n "0000:00:1a.0" | tee /sys/bus/pci/drivers/ehci_hcd/unbind
# Unbind ehci_hcd for second device 0000:00:1d.0:
echo -n "0000:00:1d.0" | tee /sys/bus/pci/drivers/ehci_hcd/unbind
;;
resume|thaw)
# Bind ehci_hcd for first device 0000:00:1a.0:
echo -n "0000:00:1a.0" | tee /sys/bus/pci/drivers/ehci_hcd/bind
# Bind ehci_hcd for second device 0000:00:1d.0:
echo -n "0000:00:1d.0" | tee /sys/bus/pci/drivers/ehci_hcd/bind
;;
esac
Set it 755 and owned by root. Now the display returns after sleep
without problems.
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https://bugs.launchpad.net/bugs/966744
Title:
[i965] Resume from suspend leaves me with black screen or a screen of
the desktop before it suspended. Compiz hung in
intel_update_renderbuffers() from intel_prepare_render() from
brw_draw_prims()
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https://bugs.launchpad.net/compiz/+bug/966744/+subscriptions
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