I can try the new kernel, yes. Also, I have tried the Noveau driver as well as the Nvidia driver, so I don't think it's a problem with the driver.
I noticed this interesting output from dmesg - any suggestions after looking over it? Thanks so much for looking at this issue with me. mwhite@wt-tpad:~$ dmesg | grep -i acpi [ 2.543464] thinkpad_acpi: ThinkPad ACPI Extras v0.24 [ 2.543469] thinkpad_acpi: http://ibm-acpi.sf.net/ [ 2.543473] thinkpad_acpi: ThinkPad BIOS G4ET62WW (2.04 ), EC unknown [ 2.543476] thinkpad_acpi: Lenovo ThinkPad T530, model 2359CTO [ 2.544619] thinkpad_acpi: detected a 8-level brightness capable ThinkPad [ 2.544796] thinkpad_acpi: radio switch found; radios are enabled [ 2.544835] thinkpad_acpi: This ThinkPad has standard ACPI backlight brightness control, supported by the ACPI video driver [ 2.544838] thinkpad_acpi: Disabling thinkpad-acpi brightness events by default... [ 2.548379] thinkpad_acpi: rfkill switch tpacpi_bluetooth_sw: radio is unblocked [ 2.549805] Registered led device: tpacpi::thinklight [ 2.549876] Registered led device: tpacpi::power [ 2.549912] Registered led device: tpacpi::standby [ 2.549951] Registered led device: tpacpi::thinkvantage [ 2.549966] thinkpad_acpi: Standard ACPI backlight interface available, not loading native one [ 2.553198] thinkpad_acpi: Console audio control enabled, mode: monitor (read only) [ 2.555345] input: ThinkPad Extra Buttons as /devices/platform/thinkpad_acpi/input/input5 [ 2.589309] ACPI Warning: 0x0000000000000460-0x000000000000047f SystemIO conflicts with Region \_SB_.PCI0.LPC_.PMIO 1 (20120320/utaddress-251) [ 2.589323] ACPI: If an ACPI driver is available for this device, you should use it instead of the native driver [ 2.589332] ACPI Warning: 0x0000000000000428-0x000000000000042f SystemIO conflicts with Region \_SB_.PCI0.LPC_.PMIO 1 (20120320/utaddress-251) [ 2.589341] ACPI: If an ACPI driver is available for this device, you should use it instead of the native driver [ 2.589347] ACPI Warning: 0x0000000000000500-0x000000000000053f SystemIO conflicts with Region \_SB_.PCI0.LPC_.LPIO 1 (20120320/utaddress-251) [ 2.589355] ACPI: If an ACPI driver is available for this device, you should use it instead of the native driver [ 3.554695] nvidia 0000:01:00.0: power state changed by ACPI to D0 [ 3.554706] nvidia 0000:01:00.0: power state changed by ACPI to D0 [ 4.509651] ACPI Error: Field [TBF3] at 274432 exceeds Buffer [NULL] size 262144 (bits) (20120320/dsopcode-236) [ 4.509663] ACPI Error: Method parse/execution failed [\_SB_.PCI0.PEG_.VID_.GETB] (Node ffff880407466348), AE_AML_BUFFER_LIMIT (20120320/psparse-536) [ 4.509675] ACPI Error: Method parse/execution failed [\_SB_.PCI0.PEG_.VID_._ROM] (Node ffff880407466320), AE_AML_BUFFER_LIMIT (20120320/psparse-536) [ 6.327212] thinkpad_acpi: asked for hotkey mask 0x0070ffbf, but firmware forced it to 0x0070ffbb -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1083984 Title: Brightness control doesn't work on Lenovo Thinkpad T530 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1083984/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
