On Fri, Nov 28, 2014 at 09:05:08PM +0000, Ken Moffat wrote: > On Fri, Nov 28, 2014 at 07:26:43PM +0000, Ken Moffat wrote: > > Just to add to Bruce's answer, this is what I have on my A4 > > (Aruba): > > CONFIG_PREVENT_FIRMWARE_BUILD=y > > # CONFIG_FIRMWARE_IN_KERNEL is not set > > CONFIG_EXTRA_FIRMWARE="radeon/BTC_rlc.bin radeon/ARUBA_me.bin > > radeon/ARUBA_pfp.bin radeon/ARUBA_rlc.bin radeon/TAHITI_uvd.bin" > > CONFIG_EXTRA_FIRMWARE_DIR="/lib/firmware" > > > > This is the machine where I've had to add more firmware over its > > life, ISTR that I did not initially need TAHITI. Hence my initial > > comment that it might take a few builds to get it all nailed down. > > > Of course, now I have posted, I've thought a little more about > this (while checking a slackware config.gz trying to work out what > is wrong with my own cnfig for an LFS qemu guest). I used to build > the firmware in (stage one : find build options which let me use > Xorg; stage two : do not change what works) and have obviously now > moved away from that. > > The CONFIG_EXTRA_FIRMWARE line is almost-certainly NOT required: > just dump all the radeon firmware in /lib/firmware/radeon and let > the kernel decide. > > Apologies to people who have probably told me that over the past > year, but I'm reluctant to break what worked. Will try to schedule > a build to check that. > And now, I withdraw those apologies.
I've just built the 3.18-rc6 kernel, and at first I thought I'd stumbled on a kernel regression. Without the firmware, this AMD A4 boots - but from the initial 80x25 console it does not switch to a framebuffer, nor load my 12x22 console font which requires a framebuffer. For people who do not care about penguins, nor readable fonts (without pretending to have a smaller screen using e.g. video=1024x768) there is a further problem: Xorg will not start, with an error message something like "kms is not implemented" (the A4 has a radeon chipset, kms is required). Reinstating the firmware, and changing the firmware directory back to /lib/firmware (it seems to default to 'firmware' in the kernel tree when the extra firmware is unset), has given me a working system. So, for _recent_ radeons (r600 and newer, no idea about r300, I used to have an r200 which did not need firmware) the extra firmware DOES need to be specified in the kernel config, at least in my experience. ĸen -- Nanny Ogg usually went to bed early. After all, she was an old lady. Sometimes she went to bed as early as 6 a.m. -- http://lists.linuxfromscratch.org/listinfo/blfs-support FAQ: http://www.linuxfromscratch.org/blfs/faq.html Unsubscribe: See the above information page
