Re: [qubes-devel] Wrong formula in gui-configuration doc?
-BEGIN PGP SIGNED MESSAGE- Hash: SHA512 On Tue, Apr 23, 2024 at 02:24:09PM +0200, Marek Marczykowski-Górecki wrote: > On Tue, Apr 23, 2024 at 11:47:42AM -, qubist wrote: > > I see this (essential lines only): > > > > # Only primary (4K) screen connected: > > > > user@dom0:~ > xrandr > > DP-1 connected primary 3840x2160+0+0 (normal left inverted right x axis y > > axis) 596mm x 335mm > >3840x2160 60.00*+ 29.9824.9924.00 > > > > # Only secondary (2K) screen connected w/ scale 2x2: > > # (note: No idea why the weird dimensions in mm, it's a big screen) > > > > DP-2 connected 3840x2160+0+0 (normal left inverted right x axis y axis) > > 16mm x 9mm > >1920x1080 60.00* 50.0059.9424.0023.98 > > > > # Both, side by side, 4K primary, 2K secondary w/ scale 2x2: > > > > DP-1 connected primary 3840x2160+0+0 (normal left inverted right x axis y > > axis) 596mm x 335mm > >3840x2160 60.00*+ 29.9824.9924.00 > >... > > DP-2 connected 3840x2160+3840+1080 (normal left inverted right x axis y > > axis) 16mm x 9mm > >1920x1080 60.00* 50.0059.9424.0023.98 > > > > > > What is the formula? > > (3840 + 3840) * 2160 * 4 / 1024 > > And even easier, you should have a top line in xrandr output with > "current ... x ..." - that's the total size you are after. > > > P.S. > > > > FWIW, the secondary (2K) screen is connected via HDMI, however xrandr > > always shows HDMI-1 and HDMI-2 as disconnected and "thinks" the > > secondary screen is on DP-2 (while there is only one physical > > DisplayPort). No idea if this is a bug or even related in any way. > > It's probably related how those connectors are routed, maybe there is > some internal converter. But could be also mislabeled outputs in the > driver. At least Intel GPUs only support DisplayPort. Those that have HDMI outputs have a protocol converter. - -- Sincerely, Demi Marie Obenour (she/her/hers) Invisible Things Lab -BEGIN PGP SIGNATURE- iQIzBAEBCgAdFiEEdodNnxM2uiJZBxxxsoi1X/+cIsEFAmYoOz0ACgkQsoi1X/+c IsEEhhAAsAvkG1j9TGZtH7Mi31Rf0nwuerC1A6c+gtMOgdylKzhsDiZK6xtu4VRS oDlyHcn/cLAlHVyUYD0Al0Viq5TIgm7VbIKFDVe+wBkg0snCPSgBRr8Glk2lBxCL 2Q1fl118FefAZMdbf58D0GJXylEccxlwOZgbimOkMIFDGUetMSP1o6uGJe8/ElLh JSpPAXkmTTE3gt67k7dU9dJ1DGkDBTmIz3O/MKg7xgUQ8ahqjQzrgcC48Hm8cSda KK4+m/3Ht/BcMfr7X6HZGZnVu01vMgQUV9YE+pK8yqAcKWYYycMOSjZ9BbfZoNCc 5tDMgGoR+F674BiJyqkh9FbnP08xt0AI8nXN9cyjQ9cgvXtuK8gFRoj6qJgUFjYy BEKda0ACwMTarQqomLj+HX2CMO/RWgt7hTqAx4RlY8Z30KbdvUApOLQOGkeiLo/+ CkFijoMSnMrKVbTPqLI9c1CIOX7lijQKzThEJYhVWxrvKnr/+1Go2HgW/JcSb/QO 58Qhg6D9NFPXO1HT+F/NtWpFb30s8GmTz4B5QhyY5UTfi9GmM2/w8AtDcG8v9B6s +n3200wOxVwn+4Hjnc9CmVXpWgs/6aHuKq6sxTL/NIG1fw7imF51l6FrSog3+EsP J6jdnYLapzDGFT3fOt0XBB51uHX4Dr/fTYPs73s/+fMNAEH2UFc= =zg/0 -END PGP SIGNATURE- -- You received this message because you are subscribed to the Google Groups "qubes-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to qubes-devel+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/qubes-devel/Zig7PZm1ROa_Xp-O%40itl-email.
Re: [qubes-devel] Wrong formula in gui-configuration doc?
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Re: [qubes-devel] Wrong formula in gui-configuration doc?
-BEGIN PGP SIGNED MESSAGE- Hash: SHA256 On Tue, Apr 23, 2024 at 11:47:42AM -, qubist wrote: > I see this (essential lines only): > > # Only primary (4K) screen connected: > > user@dom0:~ > xrandr > DP-1 connected primary 3840x2160+0+0 (normal left inverted right x axis y > axis) 596mm x 335mm >3840x2160 60.00*+ 29.9824.9924.00 > > # Only secondary (2K) screen connected w/ scale 2x2: > # (note: No idea why the weird dimensions in mm, it's a big screen) > > DP-2 connected 3840x2160+0+0 (normal left inverted right x axis y axis) 16mm > x 9mm >1920x1080 60.00* 50.0059.9424.0023.98 > > # Both, side by side, 4K primary, 2K secondary w/ scale 2x2: > > DP-1 connected primary 3840x2160+0+0 (normal left inverted right x axis y > axis) 596mm x 335mm >3840x2160 60.00*+ 29.9824.9924.00 >... > DP-2 connected 3840x2160+3840+1080 (normal left inverted right x axis y axis) > 16mm x 9mm >1920x1080 60.00* 50.0059.9424.0023.98 > > > What is the formula? (3840 + 3840) * 2160 * 4 / 1024 And even easier, you should have a top line in xrandr output with "current ... x ..." - that's the total size you are after. > P.S. > > FWIW, the secondary (2K) screen is connected via HDMI, however xrandr > always shows HDMI-1 and HDMI-2 as disconnected and "thinks" the > secondary screen is on DP-2 (while there is only one physical > DisplayPort). No idea if this is a bug or even related in any way. It's probably related how those connectors are routed, maybe there is some internal converter. But could be also mislabeled outputs in the driver. - -- Best Regards, Marek Marczykowski-Górecki Invisible Things Lab -BEGIN PGP SIGNATURE- iQEzBAEBCAAdFiEEhrpukzGPukRmQqkK24/THMrX1ywFAmYnqGkACgkQ24/THMrX 1ywg1gf9HJQJnkXOOXV/a7ttUlwm5lINhwZ7KSAqOqCX8rklWZqeVtal4ywDeld6 1G9jpL7u+yq3qZZgPYJPOoEK5VNfI5VTDFICN9xrelwJDZsZvLlrWc9qU4ddB+FW yEYcCoEGsK9GGYrieFhBQaVOtmSlcvyWVnfhLaHdiL8JfL0GTx8DiF7ZxJbDM28h 7VAdPJPsivunchjKdww+d5gvpFEv3ISxOR790EL8nOCmIypBpJ7cEvmz7/qF9DY1 iyggJ340yYHVyeRu9aHG2/KfHT04GFcHqN2YQBj/f3xj9H07Qm77DVD4mM59d7h9 ktWLlI0YQmGgNMXPeEk7Wa416g6o+w== =Icq+ -END PGP SIGNATURE- -- You received this message because you are subscribed to the Google Groups "qubes-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to qubes-devel+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/qubes-devel/ZieoaZRUcoEiKoz_%40mail-itl.
Re: [qubes-devel] Wrong formula in gui-configuration doc?
I see this (essential lines only): # Only primary (4K) screen connected: user@dom0:~ > xrandr DP-1 connected primary 3840x2160+0+0 (normal left inverted right x axis y axis) 596mm x 335mm 3840x2160 60.00*+ 29.9824.9924.00 # Only secondary (2K) screen connected w/ scale 2x2: # (note: No idea why the weird dimensions in mm, it's a big screen) DP-2 connected 3840x2160+0+0 (normal left inverted right x axis y axis) 16mm x 9mm 1920x1080 60.00* 50.0059.9424.0023.98 # Both, side by side, 4K primary, 2K secondary w/ scale 2x2: DP-1 connected primary 3840x2160+0+0 (normal left inverted right x axis y axis) 596mm x 335mm 3840x2160 60.00*+ 29.9824.9924.00 ... DP-2 connected 3840x2160+3840+1080 (normal left inverted right x axis y axis) 16mm x 9mm 1920x1080 60.00* 50.0059.9424.0023.98 What is the formula? P.S. FWIW, the secondary (2K) screen is connected via HDMI, however xrandr always shows HDMI-1 and HDMI-2 as disconnected and "thinks" the secondary screen is on DP-2 (while there is only one physical DisplayPort). No idea if this is a bug or even related in any way. -- You received this message because you are subscribed to the Google Groups "qubes-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to qubes-devel+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/qubes-devel/20240423114742.15501890%40localhost.
Re: [qubes-devel] Wrong formula in gui-configuration doc?
-BEGIN PGP SIGNED MESSAGE- Hash: SHA256 On Tue, Apr 23, 2024 at 05:33:14AM -, qubist wrote: > On Mon, 22 Apr 2024 21:24:36 +0200 Marek Marczykowski-Górecki wrote: > > > It's about the pixel count as seen by the applications, which may not > > necessarily be the display resolution if scaling is involved. > > Are you saying that scaling means preserving the original pixel count > (i.e. apps draw on the original, unscaled canvas) and then the whole > thing is scaled down in real time? Is this how xrandr works? Let me clarify it this way: when using scaling, you will see for example eDP-1 connected primary 1920x1080+0+1200 (normal left inverted right x axis y axis) 309mm x 174mm 2560x1440 60.00*+ 59.9959.9959.9659.95 ... Use the 1920x1080 in the formula, not 2560x1440 - -- Best Regards, Marek Marczykowski-Górecki Invisible Things Lab -BEGIN PGP SIGNATURE- iQEzBAEBCAAdFiEEhrpukzGPukRmQqkK24/THMrX1ywFAmYnjHMACgkQ24/THMrX 1yy6PwgAiyBrVYEnreVgRyBq6/NNQUZR8rd3b5rjzixDdZMRrNfPZ7F1rX+ww+jn c3iROIcepGTzPogM7bBQJpco+Qa5jEcp5mfyN6z62D8IBvP6hZZNwcVY80o3lCzZ DhvVuvz49bA00CW98gppo9SjNT9v15YKW+NVVim7qtPsMTAglz1tNx9hbnsCtB9m oP2k816/AAbSvdaqAbcYqjP/T8Vcety+k3zH5bZ2ZAooQTXulZ49b74inl9nUFWJ KzKtPY7zkw+cyYwwYIVEpNSMkEePMhHUHaeQHgN7wsMHuP91SD2SB4DthvujIuqq BB9gOHSF8K5Vt2RJtjiDsG5EMW6hAQ== =Foc3 -END PGP SIGNATURE- -- You received this message because you are subscribed to the Google Groups "qubes-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to qubes-devel+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/qubes-devel/ZieMc8Qbi8JosCNr%40mail-itl.
Re: [qubes-devel] Wrong formula in gui-configuration doc?
On Mon, 22 Apr 2024 21:24:36 +0200 Marek Marczykowski-Górecki wrote: > It's about the pixel count as seen by the applications, which may not > necessarily be the display resolution if scaling is involved. Are you saying that scaling means preserving the original pixel count (i.e. apps draw on the original, unscaled canvas) and then the whole thing is scaled down in real time? Is this how xrandr works? -- You received this message because you are subscribed to the Google Groups "qubes-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to qubes-devel+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/qubes-devel/20240423053314.3360ab9d%40localhost.
Re: [qubes-devel] Wrong formula in gui-configuration doc?
-BEGIN PGP SIGNED MESSAGE- Hash: SHA256 On Mon, Apr 22, 2024 at 05:18:28PM -, qubist wrote: > Thanks. Had a closer look now. > > On Mon, 22 Apr 2024 18:42:16 +0200 Marek Marczykowski-Górecki wrote: > > > What matters is the pixel count, not pixel size. > > But which pixel count? > > The pixel count reported by xrandr with the 2 screens side by side (4K > primary) is: > > user@dom0:~ > xrandr --verbose | grep "Screen 0" | sed -e 's/.*current//' -e > 's/\,.*//' > 7680 x 2160 (which means 64800 KiB for gui-videoram-min) > > which is different from 3840 * 2160 + 1920 * 1080 (i.e. 48600 KiB). > > So, the 2 formulas in the doc still give different result and it is not > clear which one is correct. It's about the pixel count as seen by the applications, which may not necessarily be the display resolution if scaling is involved. - -- Best Regards, Marek Marczykowski-Górecki Invisible Things Lab -BEGIN PGP SIGNATURE- iQEzBAEBCAAdFiEEhrpukzGPukRmQqkK24/THMrX1ywFAmYmuXQACgkQ24/THMrX 1yx0zgf/UbIX8w0XBGy0iqObsS8A/jWjtj4c3aCvLCgWfxhnWyUjyyyKZYMpEwqT lT98KrrFUynnjCW0c3ywzuR9T2ESV7NQqsoj85tRSLEnDHAG4wjgw0x6RyMbqPrN undP4RWV/sdO60a8u3t55lfxxnnbjeXmaNHNWgNtRiqAixjJiFbhlJ3FT8/NYcd9 YJQ67RRDj4GdPbCQptzYlvoepTiQ3nxkaKakPv92/tKGntIDvfyVz3tiyiSnY+zD AMXV+TIAB6pf26mwpja551WyEq3eB3iNzFIpSrrKAPD5I5kHrlNfrrqPoh+OdN5T dnugSim2/6x2ku7XP7ekW+vYapl4gA== =+ylP -END PGP SIGNATURE- -- You received this message because you are subscribed to the Google Groups "qubes-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to qubes-devel+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/qubes-devel/Zia5dA7uLNN8MDbJ%40mail-itl.
Re: [qubes-devel] Wrong formula in gui-configuration doc?
Thanks. Had a closer look now. On Mon, 22 Apr 2024 18:42:16 +0200 Marek Marczykowski-Górecki wrote: > What matters is the pixel count, not pixel size. But which pixel count? The pixel count reported by xrandr with the 2 screens side by side (4K primary) is: user@dom0:~ > xrandr --verbose | grep "Screen 0" | sed -e 's/.*current//' -e 's/\,.*//' 7680 x 2160 (which means 64800 KiB for gui-videoram-min) which is different from 3840 * 2160 + 1920 * 1080 (i.e. 48600 KiB). So, the 2 formulas in the doc still give different result and it is not clear which one is correct. -- You received this message because you are subscribed to the Google Groups "qubes-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to qubes-devel+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/qubes-devel/20240422171828.4f819e65%40localhost.
Re: [qubes-devel] Wrong formula in gui-configuration doc?
-BEGIN PGP SIGNED MESSAGE- Hash: SHA256 On Mon, Apr 22, 2024 at 04:37:54PM -, qubist wrote: > On Mon, 22 Apr 2024 15:48:02 +0200 Marek Marczykowski-Górecki wrote: > > > If you don't set the value at all, VM will allocate based on currently > > connected displays. > > Hm. This raises a few questions: > > 1. Does it mean https://www.qubes-os.org/doc/gui-configuration/ is > irrelevant/outdated? No, please read the text leading to the formula, not just the formula itself... > 2. What happens with allocation if one switches from one display setup > to another while VM(s) are running?o Read that page... > 3. What about headless VMs (no guivm)? Is video memory allocated for > them too? (thus wasting resources) No. > 4. A somewhat difficult setup: > > Due to both displays having different resolutions and because I have > been unable to find a way to set different DPI per display, currently, > it is necessary to do this when switching to the only-2K display or > dual-screen setup: > > xrandr --output DP-2 --scale 2x2 > > Without that, everything on the 2K screen is overscaled and working > side-by-side is not possible. > > Does that somehow influence the formula in the docs (because > effectively the pixels on DP-2 become x4 less)? What matters is the pixel count, not pixel size. - -- Best Regards, Marek Marczykowski-Górecki Invisible Things Lab -BEGIN PGP SIGNATURE- iQEzBAEBCAAdFiEEhrpukzGPukRmQqkK24/THMrX1ywFAmYmk2gACgkQ24/THMrX 1yxhQgf/aUFI437ylLXN16RLu64tg+wUPR6xt8Vl/xwNKdZzW5HjEp7Beuo/ew3A oa1ZdP0mIZTV/bRXRNw0wjnFYgNrb58Eq+N7whw0z5l61ZCrojIRDY7/yfOzPh9+ +x7uCUEYwytpsRftjZUwzyeq2jza3GeMup0Ql5f4C6nEOcDcJDqbGvqnx3h1V3yq DExNy+3x2M9Ag/ttWbvsHc0+uqEl+Z/tzsPrjrTHFMALwlQWn7q7QHKoHeWtkc9J 2YBWLcUeWoGV3fsZBk+hTT1DW81/buqH1ABnymVPYEQXzhJXHV868G+bahpZIEK7 yJICgk1FMilShTsIpglERVdSAr/2Zg== =XwaZ -END PGP SIGNATURE- -- You received this message because you are subscribed to the Google Groups "qubes-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to qubes-devel+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/qubes-devel/ZiaTaLen3bvxg85m%40mail-itl.
Re: [qubes-devel] Wrong formula in gui-configuration doc?
On Mon, 22 Apr 2024 15:48:02 +0200 Marek Marczykowski-Górecki wrote: > If you don't set the value at all, VM will allocate based on currently > connected displays. Hm. This raises a few questions: 1. Does it mean https://www.qubes-os.org/doc/gui-configuration/ is irrelevant/outdated? 2. What happens with allocation if one switches from one display setup to another while VM(s) are running? 3. What about headless VMs (no guivm)? Is video memory allocated for them too? (thus wasting resources) 4. A somewhat difficult setup: Due to both displays having different resolutions and because I have been unable to find a way to set different DPI per display, currently, it is necessary to do this when switching to the only-2K display or dual-screen setup: xrandr --output DP-2 --scale 2x2 Without that, everything on the 2K screen is overscaled and working side-by-side is not possible. Does that somehow influence the formula in the docs (because effectively the pixels on DP-2 become x4 less)? -- You received this message because you are subscribed to the Google Groups "qubes-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to qubes-devel+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/qubes-devel/20240422163754.07bb8c6c%40localhost.
Re: [qubes-devel] Wrong formula in gui-configuration doc?
-BEGIN PGP SIGNED MESSAGE- Hash: SHA256 On Mon, Apr 22, 2024 at 01:23:11PM -, qubist wrote: > Thanks for explaining. > > If only one of the displays is currently in use (and the whole desktop > fits in it), does it make sense to reduce the the allocated video RAM > to its requirements only (the qvm feature value)? > > I am asking because this can be done through a simple script in dom0, > triggered by a shortcut key (e.g. one switches from display1 to > display2, or to dual screen and back). If you don't set the value at all, VM will allocate based on currently connected displays. But changing the value requires restarting relevant VMs, so if you care about connecting external display without restarting all VMs, then no, you cannot lower it. But if you don't care about the need to restart, then you may not need to set the value manually at all. - -- Best Regards, Marek Marczykowski-Górecki Invisible Things Lab -BEGIN PGP SIGNATURE- iQEzBAEBCAAdFiEEhrpukzGPukRmQqkK24/THMrX1ywFAmYmapIACgkQ24/THMrX 1yy7IggAi7ksQ5QEG3hrwZIAvrZWeC3gvpfhw0iyqXxpnWo87IgfjSeElT5QHh8H 8WCQmj3BahldgcSfWvJeGJ5wuPiB+qpVQeX5emydC2XfENmyG8b3lfrVIn14uxvg 4rCW6GbRP24UZmU0Ed+1WRGE/4MkFjMfTg+na8NUE7mwUJJQOoHwoJzDjvuf4/oh vm1wzwwvugieV+EsCA4c+a/qfrYWFMxwqXQbv85OzLiSCDMKW4jSf/DX4Jw2KUHn 4AJh7hy3lBcME6bjLbq+Cippkbm7xb8Jlu87uUbRIKCiJZdW5VOPuOUe8CTOH+yQ 86oB1V6CxQqMw+3cEQeC01vjS3+9ow== =am77 -END PGP SIGNATURE- -- You received this message because you are subscribed to the Google Groups "qubes-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to qubes-devel+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/qubes-devel/ZiZqkrqODC-N-TWu%40mail-itl.
Re: [qubes-devel] Wrong formula in gui-configuration doc?
Thanks for explaining. If only one of the displays is currently in use (and the whole desktop fits in it), does it make sense to reduce the the allocated video RAM to its requirements only (the qvm feature value)? I am asking because this can be done through a simple script in dom0, triggered by a shortcut key (e.g. one switches from display1 to display2, or to dual screen and back). -- You received this message because you are subscribed to the Google Groups "qubes-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to qubes-devel+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/qubes-devel/20240422132311.361331f3%40localhost.
Re: [qubes-devel] Wrong formula in gui-configuration doc?
-BEGIN PGP SIGNED MESSAGE- Hash: SHA256 On Mon, Apr 22, 2024 at 01:01:55PM -, qubist wrote: > On Mon, 22 Apr 2024 13:31:03 +0200 Marek Marczykowski-Górecki wrote: > > > VMs do not see nor care what display is connected. > > But what I am pasting is from dom0. Or are you saying it doesn't see it > either? The formula on https://www.qubes-os.org/doc/gui-configuration/#video-ram-adjustment-for-high-resolution-displays is about informing VMs how much memory they need to allocate for video ram. I know it's a bit unintuitive as the value is set on dom0, but it's because the value on dom0 is the default for all VMs, so you can set it once instead of on every VM separately. > It is still not clear whether if it is possible to use 10/30-bit color. You can use such display, but VMs won't see wider color space, they will still use 8 bits per color (and dom0 will covert to whatever format your display uses). - -- Best Regards, Marek Marczykowski-Górecki Invisible Things Lab -BEGIN PGP SIGNATURE- iQEzBAEBCAAdFiEEhrpukzGPukRmQqkK24/THMrX1ywFAmYmY7sACgkQ24/THMrX 1yw2SwgAie0fWITCQGUo2kOFHJePtSRF1FNAHpEe/09MNSPvdk8YXmSLhtL7AAtX L7c2kpQt21TeA6v871T4mc43pkWVY/5Q7utnQamP0gtHx/8lmXQBfZJb96J1bIWy v8e9ek/Z/2fbHD4xdYyKnfOvVon7QqTO02bNBH9cnuD+iPEzjXpe7fsIU9hZZB8u aKFcduKCuA6kGvUcE6FUzRGeRAF1JYAyr4rUBNlSnLjZ5rTz28UfBQmpgDTHoAyF nXH8aw3TfiD7DOugJGpxWph5pLXe5QYj2Pk1wuApPLL1BX4XUWstNLW/jQwrvK8G ohuSCGRZzGG1fu45Vcvcc2UcRa/RmQ== =wGMh -END PGP SIGNATURE- -- You received this message because you are subscribed to the Google Groups "qubes-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to qubes-devel+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/qubes-devel/ZiZju9bCqh64p0Dc%40mail-itl.
Re: [qubes-devel] Wrong formula in gui-configuration doc?
On Mon, 22 Apr 2024 13:31:03 +0200 Marek Marczykowski-Górecki wrote: > VMs do not see nor care what display is connected. But what I am pasting is from dom0. Or are you saying it doesn't see it either? It is still not clear whether if it is possible to use 10/30-bit color. Should I ask somewhere else? -- You received this message because you are subscribed to the Google Groups "qubes-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to qubes-devel+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/qubes-devel/20240422130155.3f768ad5%40localhost.
Re: [qubes-devel] Wrong formula in gui-configuration doc?
-BEGIN PGP SIGNED MESSAGE- Hash: SHA256 On Mon, Apr 22, 2024 at 10:38:56AM -, qubist wrote: > On Mon, 22 Apr 2024 00:01:30 +0200 Marek Marczykowski-Górecki wrote: > > > It doesn't matter what your display is using, the memory allocated in > > VM for the frame buffer is 32-bits per pixel. > > When using a 4K 10-bit display (note the bpp): > > root@dom0:~ # grep bpp /sys/kernel/debug/dri/0/i915_display_info > pipe src=3840x2160+0+0, dither=no, bpp=30 > pipe src=0x0+0+0, dither=no, bpp=0 > pipe src=0x0+0+0, dither=no, bpp=0 > > When using a 2K 8-bit display: > > root@dom0:~ # grep bpp /sys/kernel/debug/dri/0/i915_display_info > pipe src=0x0+0+0, dither=no, bpp=0 > pipe src=1920x1080+0+0, dither=no, bpp=24 > pipe src=0x0+0+0, dither=no, bpp=0 > > Also, according to 'xrandr --verbose", max bpc is 12. > > How do you read this? > > If it is always 32 bits, it would mean 2-bit alpha for 10-bit display. > Or does Qubes OS even support 10/30-bit color? VMs do not see nor care what display is connected. From the VM point of view it's always 32 bits per pixel (3x8 + 8 padding, as alpha is not supported). - -- Best Regards, Marek Marczykowski-Górecki Invisible Things Lab -BEGIN PGP SIGNATURE- iQEzBAEBCAAdFiEEhrpukzGPukRmQqkK24/THMrX1ywFAmYmSncACgkQ24/THMrX 1yxtzwf8CShXlR8j4651qFqPti6tHfL2gs9Jred4yvi3xdoZ9KLnGMZYUFoR/QN/ yZlfklge0foJHDDpOUcB+Q+Ku2SfS0Did6yUMaHQVwGH1X8zXkcLYOwIICOR2FDv 9uwdqpLEVLZK3Qmsu9RDGSs83dlub1KXzWtPaW1eMfDbxrYj5OJGjPpqsB4dT4MI YroowdXAV3+7pWt7Snb6MhRMgUKRHrXlxjLa5yl+CKZaB0eIfDMh2Dbs+0X581S9 z0j9JyUWte/BdQc6E0+EwCSpvn3qZfNazFC4hDb83J/mHlf7Uu5hT4oYBmPPsshq LztovCmualC9aA+w6Sbm0HGLMg/wkw== =Dgxd -END PGP SIGNATURE- -- You received this message because you are subscribed to the Google Groups "qubes-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to qubes-devel+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/qubes-devel/ZiZKdy_6k4bqDzbg%40mail-itl.
Re: [qubes-devel] Wrong formula in gui-configuration doc?
On Mon, 22 Apr 2024 00:01:30 +0200 Marek Marczykowski-Górecki wrote: > It doesn't matter what your display is using, the memory allocated in > VM for the frame buffer is 32-bits per pixel. When using a 4K 10-bit display (note the bpp): root@dom0:~ # grep bpp /sys/kernel/debug/dri/0/i915_display_info pipe src=3840x2160+0+0, dither=no, bpp=30 pipe src=0x0+0+0, dither=no, bpp=0 pipe src=0x0+0+0, dither=no, bpp=0 When using a 2K 8-bit display: root@dom0:~ # grep bpp /sys/kernel/debug/dri/0/i915_display_info pipe src=0x0+0+0, dither=no, bpp=0 pipe src=1920x1080+0+0, dither=no, bpp=24 pipe src=0x0+0+0, dither=no, bpp=0 Also, according to 'xrandr --verbose", max bpc is 12. How do you read this? If it is always 32 bits, it would mean 2-bit alpha for 10-bit display. Or does Qubes OS even support 10/30-bit color? -- You received this message because you are subscribed to the Google Groups "qubes-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to qubes-devel+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/qubes-devel/20240422103856.3677c9d6%40localhost.
Re: [qubes-devel] Wrong formula in gui-configuration doc?
-BEGIN PGP SIGNED MESSAGE- Hash: SHA256 On Sun, Apr 21, 2024 at 06:30:37PM -, qubist wrote: > Hi, > > Is the formula in https://www.qubes-os.org/doc/gui-configuration/ both > wrong and incomplete? > > The correct calculation (for 8-bit displays) seems to be: > > (3840 * 2160 + 1920 * 1080) * 4 / 1024 = 40500 > > If e.g. the 4K screen is 10-bit, this means 1.25 bytes, i.e. > > ((3840 * 2160) * 1.25 + ( 1920 * 1080 )) * 4 / 1024 = 48600 > > The doc does not address 10-bit displays. It doesn't matter what your display is using, the memory allocated in VM for the frame buffer is 32-bits per pixel. - -- Best Regards, Marek Marczykowski-Górecki Invisible Things Lab -BEGIN PGP SIGNATURE- iQEzBAEBCAAdFiEEhrpukzGPukRmQqkK24/THMrX1ywFAmYljLoACgkQ24/THMrX 1yyBjQf/dtV0qWxhSK0CXl+YSe5CxeZRygU8fyWikqHFfvd3z61Um7z7YFAMyJES SzW18+VzTZEVWqjvlnX5h34L4VZ2KenXr+4kuP33vRFS0B583cLvwEAvJ8f+3ddR P5Xc4IyvZTOJ/PL4RKeLOSM5SSCh8yayPOKWntGruhny1BccIkuCKnV/npVclfR5 tJVXoUCeV/ic+/L1rVo1Y7F4qHmLFmS7QQLoiyPT6pbWTQDJwdnChrRk+fAQr8QA KGcYMZ56Omtp8Qjox6WNzo0+gYBchXrLgJEuWwEiIP0hJEqxtkGWNRygkCh3qp6S miAnRC85zcHveqiJN24GbLX3qI8csA== =Htm+ -END PGP SIGNATURE- -- You received this message because you are subscribed to the Google Groups "qubes-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to qubes-devel+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/qubes-devel/ZiWMuncw2fwM9xzE%40mail-itl.