I just experimented with a few different kernel versions, older and newer, from the mainline builds and from Karmic. Turns out that I get the problems described above with all kernels > 2.6.32 I tried.
The youngest kernel I found where everything works properly is linux- image-2.6.31-22-generic, which I got from http://packages.ubuntu.com/karmic/linux-image-2.6.31-22-generic. With linux-image-2.6.32-020632-generic from mainline the UI for entering the HD encryption key doesn't appear (just the framebuffer console with a lonely blinking cursor), but I can enter the key and later the display works fine. Starting from 2.6.32-02063201 the screen stays completely dark. The key can be entered and the OS itself seems to boot, but the display stays black. I can do a clean reboot with Ctrl-Alt-Del. >From some point on (or depending on the build, I don't know what the differences between the various mainline builds are), the UI is shown, but the display turns on and off. In all versions, the problems can be worked around by booting with "nomodeset" ("vga=normal" isn't even necessary). If I do that, the display doesn't blink and sleep mode works. For reference, here are the notes I took during testing: linux-image-2.6.31-11-rt - OK - Lucid linux-image-2.6.31-02063113-generic - OK - Karmic Mainline linux-image-2.6.31-22-generic - OK - Karmic linux-image-2.6.32-020632-generic - almost OK - Mainline - no UI für HD encryption visible, but display works later linux-image-2.6.32-02063201-generic - NOK - Mainline - display stays black linux-image-2.6.32-02063202-generic - NOK - Mainline - display stays black linux-image-2.6.32-02063205-generic - NOK - Mainline - display stays black linux-image-2.6.32-02063209-generic - NOK - Lucid Mainline - display stays black linux-image-2.6.32-02063215-generic - NOK - Lucid Mainline - display stays black linux-image-2.6.32-21-generic - NOK - Lucid - display blinks linux-image-2.6.32-22-generic - NOK - Lucid - display blinks linux-image-2.6.32-23-generic - NOK - Lucid - display blinks linux-image-2.6.32-24-generic - NOK - Lucid - display blinks linux-image-2.6.34-020634-generic - NOK - Lucid Mainline - display blinks linux-image-2.6.36-020636rc4-generic - NOK - Lucid Mainline - display blinks -- Thinkpad SL510 LCD switches on/off every second due to wrong button/lid events https://bugs.launchpad.net/bugs/637729 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
