On Wed, 28 Jan 2015 12:21:57 +0200 Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx> wrote: > On Thu, Jan 22, 2015 at 02:57:29PM +0100, Antonio Ospite wrote: > > Hi, > > > > it looks like linux can't use the correct PCI host resources when using > > an overridden DSDT table, even with an _unmodified_ one. > > > > I am using 3.19-rc5 rather vanilla (no acpi changes anyways) on a Bay > > Trail tablet. > > > > When I override the DSDT table I get these messages, and most of the > > devices don't work anymore: > > [...] > Are you using the latest ACPICA? > acpica-tools 20141107 > > Can anyone else reproduce that? > > Nope, but I have done several times following: > > 1) Take the DSDT dump > 2) iasl -d DSDT > 3) iasl -tc DSDT.dsl > > (the above will make .hex file) > > 4) Edit your .config and add: > > CONFIG_STANDALONE=n > CONFIG_ACPI_CUSTOM_DSDT_FILE="/path/to/your/DSDT.hex" > > 5) Rebuild and reboot > > That typically works for me. OK, that was not necessary, the initrd method works just fine. Once I knew you couldn't replicate it, I redid all the steps and now it works. It was obviously something wrong on my side, the difference between a working an a non working DSDT in my case is basically this: - OperationRegion (GNVS, SystemMemory, 0x7C22BA98, 0x0334) + OperationRegion (GNVS, SystemMemory, 0x7BEBAA98, 0x0334) Probably I was using a dump from a firmware version different than the one I was trying to override. Sorry for the noise. BTW, in my previous attempts I also ended up patching the pin numbers in the original DSDT by hand and fixing up the checksum as an experiment, if anyone ever needed to do that here is a trivial tool to calculate and verify the checksum of a DSDT table: http://git.ao2.it/experiments/ACPI.git/blob/HEAD:/acpi_table_checksum.py Thanks, Antonio -- Antonio Ospite http://ao2.it A: Because it messes up the order in which people normally read text. See http://en.wikipedia.org/wiki/Posting_style Q: Why is top-posting such a bad thing? -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
