{"action":"created","issue":{"url":"https://api.github.com/repos/voidlinux/void-packages/issues/2916","repository_url":"https://api.github.com/repos/voidlinux/void-packages","labels_url":"https://api.github.com/repos/voidlinux/void-packages/issues/2916/labels{/name}","comments_url":"https://api.github.com/repos/voidlinux/void-packages/issues/2916/comments","events_url":"https://api.github.com/repos/voidlinux/void-packages/issues/2916/events","html_url":"https://github.com/voidlinux/void-packages/issues/2916","id":115646785,"number":2916,"title":"Graphics very slow on AMD G-Series Jaguar/Radeon HD 8400E GPU","user":{"login":"nkcyham","id":5639294,"avatar_url":"https://avatars.githubusercontent.com/u/5639294?v=3","gravatar_id":"","url":"https://api.github.com/users/nkcyham","html_url":"https://github.com/nkcyham","followers_url":"https://api.github.com/users/nkcyham/followers","following_url":"https://api.github.com/users/nkcyham/following{/other_user}","gists_url":"https://api.github.com/users/nkcyham/gists{/gist_id}","starred_url":"https://api.github.com/users/nkcyham/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/nkcyham/subscriptions","organizations_url":"https://api.github.com/users/nkcyham/orgs","repos_url":"https://api.github.com/users/nkcyham/repos","events_url":"https://api.github.com/users/nkcyham/events{/privacy}","received_events_url":"https://api.github.com/users/nkcyham/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/voidlinux/void-packages/labels/Bug","name":"Bug","color":"eb6420"}],"state":"closed","locked":false,"assignee":null,"milestone":null,"comments":9,"created_at":"2015-11-07T08:26:13Z","updated_at":"2016-06-22T13:43:36Z","closed_at":"2016-06-22T13:43:36Z","body":"Hi\r\n\r\nI eventually replaced my failed desktop box with a fit-PC4 from Compulab, I deleted the original Linux Mint installation and installed Void. All is well, except that graphics are very slow, at least with one of\r\nmy applications, xnec2c, which calculates antenna radiation patterns and displays in a window as a wire frame. The slowness is apparent when the wireframe display is rotated by dragging it with the pointer. Normally the wire frame follows the pointer in real time but with Void on the fitPC4 the wire frame movement can only follow the pointer if it is moved very slowly.\r\n\r\nI downloaded a Debian Live Amateur Radio spin which contains xnec2c and tried it there, the wire frame movement is quite fast, following the pointer. I compared the time it takes for xnec2c to complete the antenna simulation and it is about 20 secs on both Void and Debian, so it is not an issue with the huge amount of floating point calculations needed. It seems to be an issue with the GPU system, perhaps Xorg or driver issue, possibly compile time configuration.\r\n\r\nFurther data: I installed Debian Live Amateur Radio on a spare partition and the above situation changed: In order to enable iwlwifi, I copied non-free firmware from void to debian (from-to /lib/firmware): The result was that xnec2c slowed down considerably, just as in Void. Eventually I found that by deleting the KABINI/kabini files in lib/firmware/radeon and rebooting debian, the problem is fixed. So its the radeon firmware that causes the problem!\r\n\r\nI tried to do the same thing in Void, but rebuilding the initrd with dracut I then cannot boot, as I have apparently no video driver for the console? Both amdgpu and radeom drivers will not work without the kabini firmware, although debian seems to work without them, apparently a lot better! If I can find a way to boot void without radeon/kabini firmware, I could verify the problem on void too - but I couldn't!\r\n\r\nAny ideas please?\r\n\r\np.s. same problem with archlinux."},"comment":{"url":"https://api.github.com/repos/voidlinux/void-packages/issues/comments/227747442","html_url":"https://github.com/voidlinux/void-packages/issues/2916#issuecomment-227747442","issue_url":"https://api.github.com/repos/voidlinux/void-packages/issues/2916","id":227747442,"user":{"login":"nkcyham","id":5639294,"avatar_url":"https://avatars.githubusercontent.com/u/5639294?v=3","gravatar_id":"","url":"https://api.github.com/users/nkcyham","html_url":"https://github.com/nkcyham","followers_url":"https://api.github.com/users/nkcyham/followers","following_url":"https://api.github.com/users/nkcyham/following{/other_user}","gists_url":"https://api.github.com/users/nkcyham/gists{/gist_id}","starred_url":"https://api.github.com/users/nkcyham/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/nkcyham/subscriptions","organizations_url":"https://api.github.com/users/nkcyham/orgs","repos_url":"https://api.github.com/users/nkcyham/repos","events_url":"https://api.github.com/users/nkcyham/events{/privacy}","received_events_url":"https://api.github.com/users/nkcyham/received_events","type":"User","site_admin":false},"created_at":"2016-06-22T13:43:36Z","updated_at":"2016-06-22T13:43:36Z","body":"It now looks like mesa+libGL does not or cannot use hardware acceleration when the KABINI firmware blobs are loaded, slowing down a lot Cairo rendering. I veryfied this by:\r\n\r\n1. Removing the kabini blobs from /lib/firmware/ and rebuilding the initrd. The result is that\r\nCairo rendering is much faster and processor workload is very much reduced. However the console goes blank but I can log in blind and start my X desktop.\r\n\r\n2. With the kabini blobs in place, I installed nvidia-libs in place of libGL and Cairo rendering again is much faster and processor workload much reduced.\r\n\r\n3. I installed catalyst-libs in place of libGL and again as above I have much faster rendering etc.\r\n\r\nSo I will file a bug report to the mesa3d devs, hopefully they may do something about it."}}
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