Summary: Screen dead after lid close-open-cycle (Dell Inspiron
Kernel Version: 2.6.13, 2.6.8 and 2.6.12-rc6-mm2
Most recent kernel where this bug did not occur: got no clue yet
Distribution: Debian Unstable with vanilla kernel
Hardware Environment: Dell Inspiron 6000, see appendix 1, BIOS version A07, ACPI
DSDT (acpidump), see appendix 3
Software Environment: gcc 4.0.2 20050821 (prerelease), 955resolution, i8kmon,
ipw2200 1.0.6 (as module), ieee80211 1.0.3 (from ieee80211.sf.net), kernel
config, see appendix 2
When booting the kernel without acpi disabled, i.e. no 'acpi=off' or not
compiling ACPI into the kernel at all, the screen does not come back after the
lid has been closed. The laptop is however not completly crashed, as it can
still be rebooted by CTRL-ALT-DELETE and accessed by SSH. The lid state
furthermore is correctly updated in /proc/acpi/button/lid/LID/state.
With acpi disabled, i.e. 'acpi=off' or not compiling it, it works correctly;
close lid -> screen out, open lid -> screen on. This also works in grub, so I
think it is the BIOS (or at least the hardware) itself which disables and
enables the screen. I can however not disable it in the BIOS.
The only drawback of the disabling of ACPI is the fact that cpu frequency
scaling does not work for me.
Steps to reproduce:
- boot without 'acpi=pff'
- close lid
- open lid
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