Hello,
On Fri, Sep 21, 2018 at 02:13:27PM -0300, felipe wrote: > Tested again with experimental kernel 4.19-rc4 and the result is the same > (not able to find firmware) as with 4.19-rc3 > and 4.19-rc2. > > Tried reinstalling the firmware-amd-graphics and firmware-linux packages. > > Booting with kernel parameters 'radeon.si_support=0 amdgpu.si_support=1' and > kernel 4.19.rc-4 the system bails and > cannot find the required firmware which is located at '/lib/firmware/radeon'. > > If I copy the contents of '/lib/firmware/radeon' to '/lib/firmware/amdgpu' > and restart, the system boots, loads the > firmware and works. > > Since previous kernels (4.17, 4.18) the system had no problem finding the > correct firmware inside '/lib/firmware/radeon' > when using amdgpu driver. > Yeah that's introduced by commit https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8eaf2b1faaf4358c6337785f2192055c6ef41e0d Instead of copying all the content of /lib/firmware/radeon into /lib/firmware/amdgpu, could you: 1. Uninstall firmware-amd-graphics properly so /lib/firmware/radeon and /lib/firmware/amdgpu are empty 2. Re-install firmware-amd-graphics properly from archives (so, basically, these two steps undo your changes) 3. Copy only /lib/firmware/radeon/pitcairn_mc.bin to /lib/firmware/amdgpu/pitcairn_mc.bin Does this work for you ? Otherwise try to find messages in dmesg complaining about missing firmware for your amdgpu driver, then copy the right missing firmwares from /lib/firmware/radeon to /lib/firmware/amdgpu and then once it works, please paste a list here. Thanks in advance, Regards, Romain > > > > On 9/13/18 1:44 PM, felipe wrote: > > Today I had some spare time and I did some tests. > > > > On kernel 4.17 and 4.18 I can switch from radeonsi to amdgpu using/removing > > 'radeon.si_support=0 amdgpu.si_support=1' > > and the system finds and loads the relevant firmware in > > /lib/firmware/radeon, giving this system a boost in performance, > > correct HDMI output and no crashes. > > > > Booting kernel 4.19, the system could not load the relevant firmware when I > > tried to use amdgpu, but booted using radeonsi. > > > > Today I did copy all the firmware in '/lib/firmware/radeon' to > > '/lib/firmware/amdgpu' and the system booted in a working > > state and has been stable for the last hour. > > > > Since it is possible to use amdgpu with older GCN cards, the kernel should > > also look for the firmware inside > > '/lib/firmware/radeon' when using 'amdgpu' driver. > > > > > > '$ cat /var/log/syslog' of this working session with kernel 4.19-rc3 and > > 'cp /lib/firmware/radeon/* /lib/firmware/amdgpu'
