>From lspci:
00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile 4 Series
Chipset Integrated Graphics Controller
[8086:2a42] (rev 07)
Subsystem: Gateway 2000 Device [107b:0390]
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B- DisINTx+
Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort-
<MAbort- >SERR- <PERR- INTx-
Latency: 0
Interrupt: pin A routed to IRQ 2298
Region 0: Memory at f0000000 (64-bit, non-prefetchable) [size=4M]
Region 2: Memory at d0000000 (64-bit, prefetchable) [size=256M]
Region 4: I/O ports at 1800 [size=8]
Capabilities: <access denied>
So this is not an nvidia chip (as expected), so the problem is unrelated
to bug #277589.
And the lshal output shows a laptop_panel device is present and
recognized, so it's also not bug #345531.
And you've said that the brightness applet also doesn't work (including
in the Ubuntu liveCD), so it's not a hotkey issue.
I'll poke around in the lshal output a bit more, but it looks like this
might be a kernel problem.
--
Brightness Applet/Brightness Keys Do Not Work In Gateway M-7315u Laptop
https://bugs.launchpad.net/bugs/280518
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