i915 on both systems. Also - disabling power management circumvents this
issue. So the bug appears to be related to power management with the
i915 driver.
Dell Studio 1558:
00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated
Graphics Controller (rev 12) (prog-if 00 [VGA controller])
Subsystem: Dell Device 0413
Flags: bus master, fast devsel, latency 0, IRQ 43
Memory at f0000000 (64-bit, non-prefetchable) [size=4M]
Memory at d0000000 (64-bit, prefetchable) [size=256M]
I/O ports at 1800 [size=8]
Expansion ROM at <unassigned> [disabled]
Capabilities: <access denied>
Kernel driver in use: i915
Kernel modules: i915
HP Pavillion p6367c:
00:02.0 VGA compatible controller: Intel Corporation 4 Series Chipset
Integrated Graphics Controller (rev 03) (prog-if 00 [VGA controller])
Subsystem: Hewlett-Packard Company Device 2a94
Flags: bus master, fast devsel, latency 0, IRQ 43
Memory at fe400000 (64-bit, non-prefetchable) [size=4M]
Memory at e0000000 (64-bit, prefetchable) [size=256M]
I/O ports at cc00 [size=8]
Expansion ROM at <unassigned> [disabled]
Capabilities: <access denied>
Kernel driver in use: i915
Kernel modules: i915
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https://bugs.launchpad.net/bugs/785841
Title:
Screen remains blank after waking up from screensaver
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